system fails to POST if I add the second pair of RAM

Correct -works fine with one matched pair ( 2 x 1 GB), but adding a second
matched pair of identical RAM (4 x 1 GB) -it does not POST -using either
auto or manual settings.

Each pair seperately works.


"kernel77" wrote in message

> I'm a tad confused about the RAM. It works okay with a matched pair of 1
> GB sticks, but will not work when you add another matched pair of 1 GB
> sticks? If all the RAM is matched, I'd think it ought to work. But, here
> are to forums where you are likely to get expert advice (this forum has
> gotten real quiet):
>
> http://forums.anandtech.com/categories.aspx?catid=29&forumid=1
>
> http://www.tomshardware.com/forum/forum-30-194.html
>
>
> "Keith" wrote in message
>
>>
>> I am stuck:
>>
>> My new system has no difficulty running a single matched pair of RAM (1 x
>> 1 GB) at 4-4-4-12 at 2.1 Volts, but fails to POST if I add the second
>> pair of RAM (4 x 1 GB).
>>
>> Motherboard : Gigabyte GA-P35DS3L
>> CPU Intel E6850 socket 775
>> Memory : Corsair TWIN2X2048-6400C4
>>
>>
>
>
 >> Stay informed about: system fails to POST if I add the second pair of RAM 

kernel77 wrote:
> I'm a tad confused about the RAM. It works okay with a matched pair of 1 GB
> sticks, but will not work when you add another matched pair of 1 GB sticks?
> If all the RAM is matched, I'd think it ought to work. But, here are to
> forums where you are likely to get expert advice (this forum has gotten real
> quiet):
>
> http://forums.anandtech.com/categories.aspx?catid=29&forumid=1
>
> http://www.tomshardware.com/forum/forum-30-194.html
>

I'd test each pair by themselves first, to make sure all is well
with them. No sense trying four, if a particular pair is not
healthy. Once at least a single good pair is identified, then
move them to the other two slots (as long as the manual allows
it - some of the boards with fancy fan control, sometimes have
a note in the manual, about a preferred slot being
used). Another thing you can try, for a laugh, is a three
stick config - that should work on an Intel chipset board.
When three works but four doesn't, then it's a BIOS issue.

Next item, is to check for BIOS updates, like ones that improved
memory compatibility. I wasn't able to get to the Gigabyte site
earlier, so couldn't check. (I'm having occasional trouble with
stuff in that part of the world, and since I get a "reset connection"
message, it could be the networking equipment at my ISP.)

There have been cases, where the memory map on a motherboard BIOS
is messed up, and stuff was overlapping. This caused strange things
to happen, like bogus "USB overcurrent" messages and the like.

You'd really need to find a private forum that specializes in Gigabyte
boards, to find out something like that. USENET doesn't have the
same concentration of effort, that some of the private forums do.
For example, Asus hosts vip.asus.com, and each motherboard model
has a forum. Some forums have very little traffic (not worth
visiting), while others have 4000 threads and are a gold mine.
That is the kind of thing every motherboard company should have.
(The Asus vip server is dog slow, so not every aspect of the thing
is wonderful. Some days, I just have to leave it alone, because
it is like being on dialup all over again. The web designers should
have bought a commercial web BBS package, instead of rolling their
own.)

Paul

>
> "Keith" wrote in message
>
>> I am stuck:
>>
>> My new system has no difficulty running a single matched pair of RAM (1 x
>> 1 GB) at 4-4-4-12 at 2.1 Volts, but fails to POST if I add the second pair
>> of RAM (4 x 1 GB).
>>
>> Motherboard : Gigabyte GA-P35DS3L
>> CPU Intel E6850 socket 775
>> Memory : Corsair TWIN2X2048-6400C4
>>
>>
>
>
 >> Stay informed about: system fails to POST if I add the second pair of RAM