I have a Corsair PC3200 matched pair (Pt # CMX512-3299C2PT). I was having
all kinds of stability issues. I tried moving the memory to differnent
slots with no luck. I moved the DDR voltage up one step. No effect. When
I take out one memory stick and run with only one everything works fine. I
tried this with both sticks to make sure nothing is wrong with one of them.
They both work fine by themselves. Of course I am not getting the full
benefit of my memory because I am only using half, and only getting half the
speed. I would appreciate any help.

Thanks

On Sat, 22 May 2004 10:46:33 -0400, "Floyd Berry" <(E-Mail Removed)>
wrote:

>I have a Corsair PC3200 matched pair (Pt # CMX512-3299C2PT). I was having
>all kinds of stability issues. I tried moving the memory to differnent
>slots with no luck. I moved the DDR voltage up one step. No effect. When
>I take out one memory stick and run with only one everything works fine. I
>tried this with both sticks to make sure nothing is wrong with one of them.
>They both work fine by themselves. Of course I am not getting the full
>benefit of my memory because I am only using half, and only getting half the
>speed. I would appreciate any help.
>
>Thanks
>


Are you running the ram in sync with the FSB?
Have you tried changing ram timings to higher latency settings?
You shouldn't need to raise dimm voltage to run them at stock speed.

I have 2 dual kits (corsair). After testing each stick separately I
found 2 of the 4 sticks (1 stick from each kit) couldn't run stable at
their rated timings under load, so memtest was basically useless as it
showed all 4 sticks were just fine, where as Prime95 instantly showed an
error! I ended up running 3 sticks at 2-3-2-6 instead of 2-2-2-6 and the
system has been rock solid for just over a year now.

Good luck,
Ed

Ed wrote:
> On Sat, 22 May 2004 10:46:33 -0400, "Floyd Berry"
> <(E-Mail Removed)> wrote:
>
>> I have a Corsair PC3200 matched pair (Pt # CMX512-3299C2PT). I was
>> having all kinds of stability issues. I tried moving the memory to
>> differnent slots with no luck. I moved the DDR voltage up one step.
>> No effect. When I take out one memory stick and run with only one
>> everything works fine. I tried this with both sticks to make sure
>> nothing is wrong with one of them. They both work fine by
>> themselves.

First, flash your BIOS to the very latest version.

Try all combinations in all slots - my TwinMOS 512MB sticks won't work in
slot 1 (!)

Use MemTest and Prime95 to verify stability.

>> Of course I am not getting the full benefit of my
>> memory because I am only using half, and only getting half the
>> speed.

Not exactly. The performance boost from dual-channel, is approximately zero.
But it's obviously better to have the full 1GB of memory, than just 512MB

> Are you running the ram in sync with the FSB?

If not, then do so.

Leave all the other timings on auto/aggressive/optimal. Manually increase
them if need be.