 |
|
 |
|
Next: Gigabyte P35-DS3P
|
| Author |
Message |
External

Since: Jun 07, 2005 Posts: 300
|
(Msg. 1) Posted: Sat Jan 19, 2008 2:03 am
Post subject: You say megabyte, I say mebibyte Archived from groups: alt>comp>hardware (more info?)
|
|
|
Consider this excerpt from the Intel D845HV/WN product guide:
| The boards supports system memory as defined below:
|
| • Up to three 168-pin SDRAM Dual Inline Memory Modules
| (DIMMs) with gold-plated contacts
|
| • PC133 SDRAM only
|
| • 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
| following memory configurations:
| - 32 MB to 384 MB (64 Mbit technology)
| - Up to 768 MB (128 Mbit technology)
| - Up to 1.5 GB (256 Mbit technology)
I have a module with only these markings:
M111301A
32*64813MC16*8M133Mh
There's probably supposed to be a "z" on the end of that second line,
but the font is small and it fills the tiny sticker from edge to edge.
The module has 16 chips, 8 per side, and was purported to be 256MiB. It
shows up as 128MiB in the motherboard above.
From what's been said, I can guess that it's a "64 Mbit technology"
module, but how can I tell that from just an inspection of the unit?
This is a specific question, but I'm also interested in some background
on memory module density, as my current understanding is:
<Frankenstein>High density memory bad</Frankenstein> >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jan 03, 2004 Posts: 7693
|
(Msg. 2) Posted: Sat Jan 19, 2008 2:03 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
On Sat, 19 Jan 2008 04:08:00 GMT, Grinder
<grinder DeleteThis @no.spam.maam.com> wrote:
>Consider this excerpt from the Intel D845HV/WN product guide:
>
>| The boards supports system memory as defined below:
>|
>| • Up to three 168-pin SDRAM Dual Inline Memory Modules
>| (DIMMs) with gold-plated contacts
>|
>| • PC133 SDRAM only
>|
>| • 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
>| following memory configurations:
>| - 32 MB to 384 MB (64 Mbit technology)
>| - Up to 768 MB (128 Mbit technology)
>| - Up to 1.5 GB (256 Mbit technology)
>
>I have a module with only these markings:
>
>M111301A
>32*64813MC16*8M133Mh
>
>There's probably supposed to be a "z" on the end of that second line,
>but the font is small and it fills the tiny sticker from edge to edge.
>The module has 16 chips, 8 per side, and was purported to be 256MiB. It
>shows up as 128MiB in the motherboard above.
When even the memory manufacturers themselves call capacity
megabit and megabyte, trying to declare you want it to be
mebibyte and then claiming megabyte means something else is
just a waste of time. The industry created the term to
apply to a specific value and it is not "you" or "me" that
has anything to say about it. A word can in fact mean
different things in different context. Giga, mega, do as
well when used with binary suffix in the computer field.
Even the hard drive manufacturers are wrong in their misuse
because the terms existed in the field before this segment
of the industry made and mislabled their drives' capacity. >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Oct 09, 2004 Posts: 2479
|
(Msg. 3) Posted: Sat Jan 19, 2008 2:08 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
Grinder wrote:
> Consider this excerpt from the Intel D845HV/WN product guide:
>
> | The boards supports system memory as defined below:
> |
> | • Up to three 168-pin SDRAM Dual Inline Memory Modules
> | (DIMMs) with gold-plated contacts
> |
> | • PC133 SDRAM only
> |
> | • 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
> | following memory configurations:
> | - 32 MB to 384 MB (64 Mbit technology)
> | - Up to 768 MB (128 Mbit technology)
> | - Up to 1.5 GB (256 Mbit technology)
>
> I have a module with only these markings:
>
> M111301A
> 32*64813MC16*8M133Mh
>
> There's probably supposed to be a "z" on the end of that second line,
> but the font is small and it fills the tiny sticker from edge to edge.
> The module has 16 chips, 8 per side, and was purported to be 256MiB. It
> shows up as 128MiB in the motherboard above.
>
> From what's been said, I can guess that it's a "64 Mbit technology"
> module, but how can I tell that from just an inspection of the unit?
>
> This is a specific question, but I'm also interested in some background
> on memory module density, as my current understanding is:
>
> <Frankenstein>High density memory bad</Frankenstein>
The table on page 23, extends even further than shown. There weren't
any large DIMMs to test when the board was released.
ftp://download.intel.com/support/motherboards/desktop/d845hv/A6513601.pdf
The 82845 three slot SDRAM based controller is here. Table 12 on
page 109, shows it can handle a 1GB SDRAM. Your 256MB should be
well away from any density issue. (I have 3x512MB on my 82845
based board, installed when it was new, and 1.5GB is reported.)
http://download.intel.com/design/chipsets/datashts/29072502.pdf
If you can boot a version of Windows that can run it, I'd try CPUZ.
It has a tab in the display for memory, and selecting the slot where
the particular stick is located, should dump info on it. If
nothing is displayed, it means there is no SPD chip (small, 8 pins or
less, serial PROM with speed and capacity info). Or it could mean
that CPUZ couldn't manage to find the SMBUS, to do the necessary
reads. That doesn't seem to get reported too often. so this should
be a good tool. At startup, be patient. It takes about
30 seconds on my current machine, before the CPUZ window appears.
http://www.cpuid.com/cpuz.php
The descriptive labels for memory, used in advertisements, are
not precise enough for figuring out what is going on. If you
really need to know, take the part number off the top of a
memory chip, and Google it. You may discover its base
capacity, like 16Mx8, and 16 of those would give 256MB.
The density issue has to do with available row and column
address bits, and comes into play when modules larger than
were intended, show up. On the 440BX, where 128MB DIMMs might
have been expected, you can run 256MB DIMMs if they are
"low density". If the 256MB DIMM had 16 chips, the number
of row/column is one less, than if the DIMM had 8 chips.
Each of the 8 chips would have double the amount of memory
("higher density") and need an extra address bit when
accessing the memory array inside. Failure to solve the density
issue, may result in only half the memory being detected. (BIOS
detects by attempted probes to memory, and some of the probes
failing due to the mismatch on addressing.)
An example of another chipset with a density issue, might be
an Nforce2. A 1GB with 16 chips (two banks), using 64Mx8 chips
would work properly. The "Ebay memory" config of 1GB DDR, which
is 16 chips (but only one bank), using 128Mx4 chips, is only
half detected. The "128M" dimensions in that case, require the
extra (missing) address bit. Note that this case doesn't work
like the one quoted for 440BX. In this case, both 1GB DDR have
16 chips, so unless the seller is honest and tells you there
are 128Mx4 chips being used, you'd actually have to get the
memory chip part number, to figure it out. (Nobody includes
the SPD table in a memory sales advertisement  The
SPD contents, if you decoded them, would also be a dead
giveaway.)
Paul >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jun 07, 2005 Posts: 300
|
(Msg. 4) Posted: Sat Jan 19, 2008 5:06 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
Paul wrote:
> Grinder wrote:
>> Consider this excerpt from the Intel D845HV/WN product guide:
>>
>> | The boards supports system memory as defined below:
>> |
>> | • Up to three 168-pin SDRAM Dual Inline Memory Modules
>> | (DIMMs) with gold-plated contacts
>> |
>> | • PC133 SDRAM only
>> |
>> | • 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
>> | following memory configurations:
>> | - 32 MB to 384 MB (64 Mbit technology)
>> | - Up to 768 MB (128 Mbit technology)
>> | - Up to 1.5 GB (256 Mbit technology)
>>
>> I have a module with only these markings:
>>
>> M111301A
>> 32*64813MC16*8M133Mh
>>
>> There's probably supposed to be a "z" on the end of that second line,
>> but the font is small and it fills the tiny sticker from edge to edge.
>> The module has 16 chips, 8 per side, and was purported to be 256MiB.
>> It shows up as 128MiB in the motherboard above.
>>
>> From what's been said, I can guess that it's a "64 Mbit technology"
>> module, but how can I tell that from just an inspection of the unit?
>>
>> This is a specific question, but I'm also interested in some
>> background on memory module density, as my current understanding is:
>>
>> <Frankenstein>High density memory bad</Frankenstein>
>
> The table on page 23, extends even further than shown. There weren't
> any large DIMMs to test when the board was released.
>
> ftp://download.intel.com/support/motherboards/desktop/d845hv/A6513601.pdf
>
> The 82845 three slot SDRAM based controller is here. Table 12 on
> page 109, shows it can handle a 1GB SDRAM. Your 256MB should be
> well away from any density issue. (I have 3x512MB on my 82845
> based board, installed when it was new, and 1.5GB is reported.)
>
> http://download.intel.com/design/chipsets/datashts/29072502.pdf
>
> If you can boot a version of Windows that can run it, I'd try CPUZ.
> It has a tab in the display for memory, and selecting the slot where
> the particular stick is located, should dump info on it. If
> nothing is displayed, it means there is no SPD chip (small, 8 pins or
> less, serial PROM with speed and capacity info). Or it could mean
> that CPUZ couldn't manage to find the SMBUS, to do the necessary
> reads. That doesn't seem to get reported too often. so this should
> be a good tool. At startup, be patient. It takes about
> 30 seconds on my current machine, before the CPUZ window appears.
CPU-Z 1.41 reports:
Memory tab
General frame
Type: SDRAM
Size: 256 MBytes
Bank Interleave: none
Timings frame
Frequency: 100.0 MHz
tCL: 3.0 clocks
tRCD: 3 clocks
tRP: 3 clocks
tRAS: 6 clocks
all other fields on this tab are disabled
SPD tab
only Slot #1 shows as populated, with SDRAM
Module Size: 128 MBytes
Max Bandwidth: PC133 (133 MHz)
Manufacturer: Samsung
Part Number: M366S1723BTS-C75
Serial Number: FFFFFFFF
Correction: None
Registered: no
Buffered: no
Week/Year: 255 / 255
Timings Table frame
Frequency: 133 MHz
tCL: 3.0
tRCD: 3
tRP: 3
tRAS: 6
- - - - - - - - - - - - - - - - -
How is it that my only memory module has a "Module Size" of 128 MBytes,
yet my system memory reports (and memtests) as 256 MBytes? >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Oct 09, 2004 Posts: 2479
|
(Msg. 5) Posted: Sat Jan 19, 2008 5:20 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
Grinder wrote:
> Paul wrote:
>> Grinder wrote:
>>> Consider this excerpt from the Intel D845HV/WN product guide:
>>>
>>> | The boards supports system memory as defined below:
>>> |
>>> | • Up to three 168-pin SDRAM Dual Inline Memory Modules
>>> | (DIMMs) with gold-plated contacts
>>> |
>>> | • PC133 SDRAM only
>>> |
>>> | • 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
>>> | following memory configurations:
>>> | - 32 MB to 384 MB (64 Mbit technology)
>>> | - Up to 768 MB (128 Mbit technology)
>>> | - Up to 1.5 GB (256 Mbit technology)
>>>
>>> I have a module with only these markings:
>>>
>>> M111301A
>>> 32*64813MC16*8M133Mh
>>>
>>> There's probably supposed to be a "z" on the end of that second line,
>>> but the font is small and it fills the tiny sticker from edge to
>>> edge. The module has 16 chips, 8 per side, and was purported to be
>>> 256MiB. It shows up as 128MiB in the motherboard above.
>>>
>>> From what's been said, I can guess that it's a "64 Mbit technology"
>>> module, but how can I tell that from just an inspection of the unit?
>>>
>>> This is a specific question, but I'm also interested in some
>>> background on memory module density, as my current understanding is:
>>>
>>> <Frankenstein>High density memory bad</Frankenstein>
>>
>> The table on page 23, extends even further than shown. There weren't
>> any large DIMMs to test when the board was released.
>>
>> ftp://download.intel.com/support/motherboards/desktop/d845hv/A6513601.pdf
>>
>> The 82845 three slot SDRAM based controller is here. Table 12 on
>> page 109, shows it can handle a 1GB SDRAM. Your 256MB should be
>> well away from any density issue. (I have 3x512MB on my 82845
>> based board, installed when it was new, and 1.5GB is reported.)
>>
>> http://download.intel.com/design/chipsets/datashts/29072502.pdf
>>
>> If you can boot a version of Windows that can run it, I'd try CPUZ.
>> It has a tab in the display for memory, and selecting the slot where
>> the particular stick is located, should dump info on it. If
>> nothing is displayed, it means there is no SPD chip (small, 8 pins or
>> less, serial PROM with speed and capacity info). Or it could mean
>> that CPUZ couldn't manage to find the SMBUS, to do the necessary
>> reads. That doesn't seem to get reported too often. so this should
>> be a good tool. At startup, be patient. It takes about
>> 30 seconds on my current machine, before the CPUZ window appears.
>
> CPU-Z 1.41 reports:
>
> Memory tab
>
> General frame
> Type: SDRAM
> Size: 256 MBytes
> Bank Interleave: none
>
> Timings frame
> Frequency: 100.0 MHz
> tCL: 3.0 clocks
> tRCD: 3 clocks
> tRP: 3 clocks
> tRAS: 6 clocks
>
> all other fields on this tab are disabled
>
> SPD tab
>
> only Slot #1 shows as populated, with SDRAM
> Module Size: 128 MBytes
> Max Bandwidth: PC133 (133 MHz)
> Manufacturer: Samsung
> Part Number: M366S1723BTS-C75
> Serial Number: FFFFFFFF
> Correction: None
> Registered: no
> Buffered: no
> Week/Year: 255 / 255
>
> Timings Table frame
> Frequency: 133 MHz
> tCL: 3.0
> tRCD: 3
> tRP: 3
> tRAS: 6
>
> - - - - - - - - - - - - - - - - -
>
> How is it that my only memory module has a "Module Size" of 128 MBytes,
> yet my system memory reports (and memtests) as 256 MBytes?
Not a clue. I ran that part number, and the first hit says it is
a 128MB stick.
http://www.pinnaclemicro.com/frames/computer/parts.php?g=M366S1723BTS-C75&page=1
The actual Samsung site is hard to find stuff on. Not all the archived
pages work right. Again, that part number seems to be a 128MB, complete
with a typo for that particular entry (chip type and number are not
correct). One poster in Google with that part number, mentions the
RAM is single sided, so it is likely (  16Mx8. (I.e. Eight pieces
of 128Megabit technology.) Now, you say it has 16 chips, so something
isn't right. Maybe the module has the wrong SPD chip soldered to it ?
http://web.archive.org/web/20010709003225/http://samsungelectronics.co...emicond
The chips themselves have part numbers on them, but my odds of finding
them on Samsung aren't very good. I was lucky that the above
archived page even rendered. Many of them do not.
Paul >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jul 13, 2005 Posts: 637
|
(Msg. 6) Posted: Mon Jan 21, 2008 7:05 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
"kony" <spam RemoveThis @spam.com> wrote in message
news:b413p3t8cn3uppcilqtafvv0l6288r0lpc@4ax.com...
> On Sat, 19 Jan 2008 04:08:00 GMT, Grinder
> <grinder RemoveThis @no.spam.maam.com> wrote:
>
>>Consider this excerpt from the Intel D845HV/WN product guide:
>>
>>| The boards supports system memory as defined below:
>>|
>>| . Up to three 168-pin SDRAM Dual Inline Memory Modules
>>| (DIMMs) with gold-plated contacts
>>|
>>| . PC133 SDRAM only
>>|
>>| . 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
>>| following memory configurations:
>>| - 32 MB to 384 MB (64 Mbit technology)
>>| - Up to 768 MB (128 Mbit technology)
>>| - Up to 1.5 GB (256 Mbit technology)
>>
>>I have a module with only these markings:
>>
>>M111301A
>>32*64813MC16*8M133Mh
>>
>>There's probably supposed to be a "z" on the end of that second line,
>>but the font is small and it fills the tiny sticker from edge to edge.
>>The module has 16 chips, 8 per side, and was purported to be 256MiB. It
>>shows up as 128MiB in the motherboard above.
>
> When even the memory manufacturers themselves call capacity
> megabit and megabyte, trying to declare you want it to be
> mebibyte and then claiming megabyte means something else is
> just a waste of time. The industry created the term to
> apply to a specific value and it is not "you" or "me" that
> has anything to say about it. A word can in fact mean
> different things in different context. Giga, mega, do as
> well when used with binary suffix in the computer field.
> Even the hard drive manufacturers are wrong in their misuse
> because the terms existed in the field before this segment
> of the industry made and mislabled their drives' capacity.
I must bite my tongue! >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jul 13, 2005 Posts: 637
|
(Msg. 7) Posted: Mon Jan 21, 2008 10:05 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
"kony" <spam DeleteThis @spam.com> wrote in message
news:b413p3t8cn3uppcilqtafvv0l6288r0lpc@4ax.com...
> On Sat, 19 Jan 2008 04:08:00 GMT, Grinder
> <grinder DeleteThis @no.spam.maam.com> wrote:
>
>>Consider this excerpt from the Intel D845HV/WN product guide:
>>
>>| The boards supports system memory as defined below:
>>|
>>| . Up to three 168-pin SDRAM Dual Inline Memory Modules
>>| (DIMMs) with gold-plated contacts
>>|
>>| . PC133 SDRAM only
>>|
>>| . 64 Mbit, 128 Mbit, and 256 Mbit technologies for the
>>| following memory configurations:
>>| - 32 MB to 384 MB (64 Mbit technology)
>>| - Up to 768 MB (128 Mbit technology)
>>| - Up to 1.5 GB (256 Mbit technology)
>>
>>I have a module with only these markings:
>>
>>M111301A
>>32*64813MC16*8M133Mh
>>
>>There's probably supposed to be a "z" on the end of that second line,
>>but the font is small and it fills the tiny sticker from edge to edge.
>>The module has 16 chips, 8 per side, and was purported to be 256MiB. It
>>shows up as 128MiB in the motherboard above.
>
> When even the memory manufacturers themselves call capacity
> megabit and megabyte, trying to declare you want it to be
> mebibyte and then claiming megabyte means something else is
> just a waste of time. The industry created the term to
> apply to a specific value and it is not "you" or "me" that
> has anything to say about it. A word can in fact mean
> different things in different context. Giga, mega, do as
> well when used with binary suffix in the computer field.
> Even the hard drive manufacturers are wrong in their misuse
> because the terms existed in the field before this segment
> of the industry made and mislabled their drives' capacity.
Nope, I couldn't do it... Sorry Kony I have to argue again!
In the computing field, a network line rated at 1 megabit refers to
1,000,000 bits. So 8 megabits = 8,000,000 bits. There are 8 bits in a byte
so 8 megabits = 1 megabyte. Therefore 1 megabyte = 8,000,000 bits or
1,000,000 bytes. This agrees with the definition of mega, which is 1
million, or 10 to the power 6. There is no scientific definition of mega
where it means 1,024,000 - this is wrong. This definition of mega is widely
used (and dare I say accepted) by some in computing. There are even websites
that state mega = 1,024,000, or 2 to the power 10, but it is wrong. Mega is
a scientific, mathematical term meaning 10 to the power 6. >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jan 03, 2004 Posts: 7693
|
(Msg. 8) Posted: Mon Jan 21, 2008 1:46 pm
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
On Mon, 21 Jan 2008 10:16:37 -0000, "GT"
<ContactGT_remove_.DeleteThis@hotmail.com> wrote:
>Mega is
>a scientific, mathematical term meaning 10 to the power 6.
>
.... and in the computer industry it is a different value
when referring to a binary value with byte or bit
Like I already wrote, terms can mean different things. Like
I already wrote, even the memory manufacturers themselves
use the term to mean something specific in a binary system. >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Nov 16, 2005 Posts: 186
|
(Msg. 9) Posted: Tue Jan 22, 2008 12:54 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
In message <00ebbed0$0$25813$c3e8da3@news.astraweb.com> "GT"
<ContactGT_remove_.TakeThisOut@hotmail.com> wrote:
>There is no scientific definition of mega
>where it means 1,024,000 - this is wrong. This definition of mega is widely
>used (and dare I say accepted) by some in computing.
No, it's not.
>There are even websites
>that state mega = 1,024,000, or 2 to the power 10, but it is wrong.
If you're trying to discuss one megabyte, 1,024,000 is just wrong either
way, as is 2 to the power of 10.
1,000,000 is correct in normal metric units.
1,048,576 is correct in established binary computation.
2^20 is also correct in established binary computation.
Is it consistent? No. Is that a problem? Sometimes.
>Mega is
>a scientific, mathematical term meaning 10 to the power 6.
Like billion is a scientific, mathematic term, right? >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jul 13, 2005 Posts: 637
|
(Msg. 10) Posted: Tue Jan 22, 2008 7:05 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
"kony" <spam.RemoveThis@spam.com> wrote in message
news:j1q9p3t33rphfj26mrs30viui371ej91fo@4ax.com...
> On Mon, 21 Jan 2008 10:16:37 -0000, "GT"
> <ContactGT_remove_.RemoveThis@hotmail.com> wrote:
>
>>Mega is
>>a scientific, mathematical term meaning 10 to the power 6.
>>
>
> ... and in the computer industry it is a different value
> when referring to a binary value with byte or bit
>
> Like I already wrote, terms can mean different things. Like
> I already wrote, even the memory manufacturers themselves
> use the term to mean something specific in a binary system.
It doesn't matter what number base you are operating in. A quantity is a
quantity. 10 bits is the same quantity as 10 cars. 1000 houses is the same
quantity as 1000 bytes. 1 kilometre (1000 metres) is the same quantity as 1
kilobyte (1000 bytes).
1,000 = 1 thousand = kilo = 10^3
1,000,000 = 1 million = mega = 10^6
1,048,576 = 1.048576 million = a number derived from raising 2 to the power
20. It happens to be quite close to 1,000,000, but it does not change the
basic mathematics system. A quantity described as 'mega' is 1,000,000 units
(bits, bytes, apples, cars, atoms) and we cannot use any other number in
place of 1,000,000 when talking about 'mega'. To do so would render all
calculations based upon it as unreliable and wrong. >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jul 13, 2005 Posts: 637
|
(Msg. 11) Posted: Tue Jan 22, 2008 7:05 am
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
"DevilsPGD" <spam_narf_spam DeleteThis @crazyhat.net> wrote in message
news:4h5bp3l5vp2ahgg1t3ja3tqseocoanpf9d@4ax.com...
> In message <00ebbed0$0$25813$c3e8da3@news.astraweb.com> "GT"
> <ContactGT_remove_ DeleteThis @hotmail.com> wrote:
>
> [trimmed]
> If you're trying to discuss one megabyte...
>
> 1,000,000 is correct in normal metric units.
>
> 1,048,576 is correct in established binary computation.
No. That figure is incorrect, but accepted by some in the computer industry.
It doesn't matter what base you are working in. mega is 10^6.
> 2^20 is also correct in established binary computation.
Nope - not correct, just a number that is misused in the computing field -
nothing to do with binary computation! 2^20 is not even a binary number!
2^20 is a decimal number used by some in the computing field to represent
mega as it conveniently equates to a number close to the actual mega figure.
It is simply an approximation to mega and any calculations or statements
made using it are inherrantly unreliable - as demonstrated below! Please
don't be sucked in by a wikipedia reference!! mega is a term used to
describe quantity and that quantity is 1,000,000. There are no other
meanings of mega.
> Is it consistent? No. Is that a problem? Sometimes.
Consistency is not an issue/question - correctness is the problem here
making it a big problem. As established centuries ago and now used in every
walk of life, including some areas of computing mega means 10^6 or
1,000,000.
In datacomms for example, the correct meaning of mega is used and a line
capable of 1 megabit can transfer 1,000,000 bits per second. So 8 megabits
is 8,000,000 bits per second. As there are 8 bits in a byte, 1 megabyte = 8
megabits. So 1 megabyte = 8,000,000 bits or 1,000,000 bytes per second.
Simple, mathematically correct and reliable.
Lets ignore stop and start and parity bits. On this 1 megabyte connection,
the line can transfer 1,000,000 bytes per second. If everyone in the
computing field used the correct meaning of mega, then to fill up 256MB of
RAM, this would take 256 seconds. However in memory terms, 256MB of RAM
isn't taken to mean 256,000,000 bytes. When we in the computing field refer
to 256MB of RAM, we are actually talking about 268.4MB!! So filling the
memory at 1,000,000 bytes per second will actually take 268.43 seconds! An
apparent extra 12.43 seconds came from the incorrect use of MB.
Anyone choosing to use 1,048,576 for mega will find that equations fail to
add up! They will discover that they don't have as much space as they
thought on a hard disk for example!!
There is a term invented for this 1,048,576 figure that everyone keeps
quoting - see the subject of this topic, but it certainly isn't 'mega'! >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jan 03, 2004 Posts: 7693
|
(Msg. 12) Posted: Tue Jan 22, 2008 2:51 pm
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
On Tue, 22 Jan 2008 10:54:17 -0000, "GT"
<ContactGT_remove_.TakeThisOut@hotmail.com> wrote:
>"kony" <spam.TakeThisOut@spam.com> wrote in message
>news:j1q9p3t33rphfj26mrs30viui371ej91fo@4ax.com...
>> On Mon, 21 Jan 2008 10:16:37 -0000, "GT"
>> <ContactGT_remove_.TakeThisOut@hotmail.com> wrote:
>>
>>>Mega is
>>>a scientific, mathematical term meaning 10 to the power 6.
>>>
>>
>> ... and in the computer industry it is a different value
>> when referring to a binary value with byte or bit
>>
>> Like I already wrote, terms can mean different things. Like
>> I already wrote, even the memory manufacturers themselves
>> use the term to mean something specific in a binary system.
>
>It doesn't matter what number base you are operating in. A quantity is a
>quantity. 10 bits is the same quantity as 10 cars. 1000 houses is the same
>quantity as 1000 bytes. 1 kilometre (1000 metres) is the same quantity as 1
>kilobyte (1000 bytes).
Wrong, and even the memory manufacturers themselves agree.
Write to every memory manufacturer and have them follow your
system and then you begin to be right. Until that happens
all the evidence is against you, that giga, mega, etc -byte
or -bit are not purely decimal system values.
How can this be hard to understand? Do you need to take
another look at a memory module's capacity for confirmation?
Different number system, different industry, different
value.
BTW, scientists DO consider gigabyte to mean what the
computer industry long ago defined because the industry
CREATED THE TERM SPECIFICALLY TO MEAN A CERTAIN VALUE.
You don't have to like the how or why, that's just the way
it is. >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jul 13, 2005 Posts: 637
|
(Msg. 13) Posted: Tue Jan 22, 2008 10:33 pm
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
"kony" <spam.RemoveThis@spam.com> wrote in message
news:a4icp3hn0hl6dephofo08qhsbd4jru3ouu@4ax.com...
> On Tue, 22 Jan 2008 10:54:17 -0000, "GT"
> <ContactGT_remove_.RemoveThis@hotmail.com> wrote:
>
>>"kony" <spam.RemoveThis@spam.com> wrote in message
>>news:j1q9p3t33rphfj26mrs30viui371ej91fo@4ax.com...
>>> On Mon, 21 Jan 2008 10:16:37 -0000, "GT"
>>> <ContactGT_remove_.RemoveThis@hotmail.com> wrote:
>>>
>>>>Mega is
>>>>a scientific, mathematical term meaning 10 to the power 6.
>>>>
>>>
>>> ... and in the computer industry it is a different value
>>> when referring to a binary value with byte or bit
>>>
>>> Like I already wrote, terms can mean different things. Like
>>> I already wrote, even the memory manufacturers themselves
>>> use the term to mean something specific in a binary system.
>>
>>It doesn't matter what number base you are operating in. A quantity is a
>>quantity. 10 bits is the same quantity as 10 cars. 1000 houses is the same
>>quantity as 1000 bytes. 1 kilometre (1000 metres) is the same quantity as
>>1
>>kilobyte (1000 bytes).
Kony, every day in the this group I bow to your knowledge in the hardware
field, but we are just never going to agree on this one!
> Wrong, and even the memory manufacturers themselves agree.
Of course they would agree - they invented the misinterpretation!
> Write to every memory manufacturer and have them follow your
> system and then you begin to be right. Until that happens
> all the evidence is against you, that giga, mega, etc -byte
> or -bit are not purely decimal system values.
I don't need to write to anyone as it isn't my system. Its called
mathematics and everyone else in the world seems to manage it without
difficultly - its only some in the computing field that have a problem
understanding the terms!
> How can this be hard to understand?
Precisely my point: Mega means million, not 1.048576 million!! Not hard to
understand at all, so why can't everyone grasp this!
> Do you need to take
> another look at a memory module's capacity for confirmation?
>
> Different number system, different industry, different
> value.
Its not a different number system - why do you insist on quoting number
systems - this is irrelevant. There is no number system when you are
counting things. We are measuring quantity and happen to be counting it in
decimal (not binary). A quantity is a quantity. Your argument is empty until
you can explain how is 1000 bytes is a larger quantity than 1000 apples? Its
not. 1 kilo is 1 kilo is 1000. End of story.
> BTW, scientists DO consider gigabyte to mean what the
> computer industry long ago defined because the industry
> CREATED THE TERM SPECIFICALLY TO MEAN A CERTAIN VALUE.
You are wrong on a vital point there - the industry didn't *create* the
term!! And I don't know a single scientists who abandons scientific terms
and gets their 'sums' wrong! The term kilo, mega etc were devised centuries
before computing industry existed. Some in the industry incorrectly adjusted
the term and has been misused it ever since. Unfortunately, many people and
companies played along and now it has stuck, yet there are those of us who
refuse to accept the incorrect interpretation of these clearly defined and
well established terms.
> You don't have to like the how or why, that's just the way
> it is.
Absolutely! >> Stay informed about: You say megabyte, I say mebibyte |
|
| Back to top |
|
 |  |
External

Since: Jan 03, 2004 Posts: 7693
|
(Msg. 14) Posted: Wed Jan 23, 2008 5:19 pm
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
|
|
| Back to top |
|
 |  |
External

Since: Jun 07, 2005 Posts: 300
|
(Msg. 15) Posted: Wed Jan 23, 2008 6:03 pm
Post subject: Re: You say megabyte, I say mebibyte [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
|
|
|
|
|
| Back to top |
|
 |  |
| Related Topics: | Get the Serial Number with Visual Basic - Hi folks, I have to write a Visual Basic 6.0 Program and need to uniquely identify a computer in a network and the user mustn't be able to change that id while my program is running. So the Volume Serial Number of the HDD isn't a possibility, because yo...
which one to get? - I'm looking for a DVD +/- R/RW. These two seem to be a pretty good value. Which one should I get? Plextor PX-708A http://www.plextor.com/english/products/708A.html or Sony DRU510A..
questions about DVD-RAM and 2 sided DVDs - The guy I spoke to at my local Futureshop showed me that LG dvd burner they had that supported DVD-RAM and that some type of DVD-RAM media you could write on both sides. He told me he didn't have them though. I've made a few phone calls at my local..
Subject: Another Slow Hard Drive Issue - Ack, I am having a problem. Access to my hard drive is a tad slow. I am running win 2K sp4, on a 1gig hz machine 768meg ram. I have a Maxtor 200gig hard drive on the second IDE channel. It is plugged into a removable tray. I recently went to device...
Maxtor One Touch USB NTFS Failure - I bought two Maxtor One Touch USB drives and both failed on the NTFS format under Windows XP Home (all current updates applied) The formatting meter gets to 100% but then an error displays that the format failed. Can anyone help? TIA, Dan |
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
|
|
|
 |
|
|