Kt7A and Sempron 2400+ FSB333

Hi,

I need to update my Duron 1600 processor due to constant lock-ups
whenever I do any DVD processing work (I was unlucky that I was sent the
'brown' MIXIB duron since I have read that there are problems with this
version of the processor, however I hear that the 'green' MIUHB version
is very good).

My question is what would be the best FSB settings in the bios to
maximise the speed of the Sempron 2400+, bearing in mind that the
Sempron has a FSB of 167/333 MHz and of course the KT7A has only 133/266
MHz.
For example, if I set the "CPU FSB Plus (MHz)" to 27 and the "CPU
FSB/PCI Clock" to 140/35MHz what effect will this have on the memory
speed (I'm using 1 stick of Crucial PC133 512MB).
Also, is the Sempron 2400+ multiplier locked and if so is there a method
to get round this.

My current setup is:
KT7A version 1.1 with 7N bios
Duron 1600 MIXIB processor
Crucial PC133 512MB
Seagate 160GB hard drive
Radeon 9200 256MB
MSI DVD rewriter
sound/network/modem (ISA)/TV tuner cards
500W P.S.
Win XP Pro SP1

Regards,
Tony

On Mon, 02 Jan 2006 22:18:58 +0000, Tony Foreman wrote:

> I need to update my Duron 1600 processor due to constant lock-ups
> whenever I do any DVD processing work (I was unlucky that I was sent the
> 'brown' MIXIB duron since I have read that there are problems with this
> version of the processor, however I hear that the 'green' MIUHB version
> is very good).
>
The color means nothing. You've got an Athlon XP Tbred B core with the
cache set for 64K instead of 256K. I don't have a problem running mine at
12x185 @1.7v in a K7S8X-R3 Asrock board.

> My question is what would be the best FSB settings in the bios to
> maximise the speed of the Sempron 2400+, bearing in mind that the
> Sempron has a FSB of 167/333 MHz and of course the KT7A has only 133/266
> MHz.

Forget using a Sempron with a KT7A. If you really want to upgrade the CPU,
get an XP-M, which has a default 133MHz FSB. If bit 5 (AJ27) isn't pulled
high, pull it high, set the multiplier to 9, which will be 17x and set the
FSB to 133Mhz, vcore about 1.70v should do it for a fast stable 2260MHz
with 512K cache.

> For example, if I set the "CPU FSB Plus (MHz)" to 27 and the "CPU
> FSB/PCI Clock" to 140/35MHz what effect will this have on the memory
> speed (I'm using 1 stick of Crucial PC133 512MB).

What you will have is a system that won't boot. And even if it did would
still only run about 1667 MHz. The most FSB you can get out of the KT7A is
about 150MHz if you're lucky. Probably won't be very stable there either.

> Also, is the Sempron 2400+ multiplier locked and if so is there a method
> to get round this.
>
Yes, it's locked. With luck, you might be able to turn it into an XP-M,
but it will still have the smaller cache. Don't waste your time or money.

> My current setup is:
> KT7A version 1.1 with 7N bios
> Duron 1600 MIXIB processor
> Crucial PC133 512MB
> Seagate 160GB hard drive
> Radeon 9200 256MB
> MSI DVD rewriter
> sound/network/modem (ISA)/TV tuner cards 500W P.S. Win XP Pro SP1
>
I don't know what's causing your lockups, but a new cpu probably won't fix
it. Have you checked the caps on the MB. They're notorious for failure
with leaking and bulging. Sometimes a better PSU wiil compensate for this,
but if you have a cap problem, it's better to either fix it or get a new
board (what I'd do). Actually, at that point, you might as well go to
socket 754 or 939 and sell the old stuff on ebay. Socket A is dead. Let it
die.

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