DDR memory

June 29, 2009 at 09:48:43
Specs: Windows XP, 2G/2G
Hi
My motherboard has 2 DDR ram slots. It can take up to 1G in each. At present I have 2, identical, but not matched 512M DDR sticks. If I run memory test with either stick in either slot no problems. If I run both sticks together (1G) total the memory test eventually fails, after about 10 minutes.
I'm starting to think its a 3.3v PSU problem.
Anybody got any ideas.

See More: DDR memory

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#1
June 29, 2009 at 09:52:38
Which memory test program are you using? Are you sure both sticks are identical? Did you manually configure the RAM settings in the BIOS or are you just accepting the defaults?

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#2
June 29, 2009 at 10:14:04
Hi
I'm using the windows Usoft one. I found it on the Web and
its down loaded onto a floppy which you insert prior to boot
up. It looks OK and picks up the memory size. It does
comprehensive tests. I have not touched the BIOS didn't
know it involved memory. Both sticks are corsair 512M 3200.

Regards


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#3
June 29, 2009 at 11:26:28
"Both sticks are corsair 512M 3200"

Both have the same timings & voltage requirements? Verify that the BIOS is detecting them correctly.

Try memtest86, memtest86+ or Windows Memory Diagnostic.


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Related Solutions

#4
June 29, 2009 at 12:17:15
Hi
Its windows diags which is picking up the ram errors. Ive
rechecked my ram. Both sticks are 512M 3200. One is a
VS512MB400, and the other is VS 512MB400C3. There is
a difference in the latency but would this cause failure when
the sticks are working together. Als noted on other posts that
there is a question about using a graphics card. Well I do but
the PSU is rated at 400W so this should not be a problem.
Any ideas.

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#5
June 29, 2009 at 12:39:46
A bit more on my DDR problrm. The CPU is an AMD 2800
DKV4D. This is quoted as having a FSB as 333MHZ.
The board has a clock switch. On = 100/200, Off = 166/333.
Mine is set to off. The DDRs are 400. I have always believed
that this is just the upper speed that they can handle. It will
not care that the board supplies data at 166MH.
(166 x 2 = 333). Any comments.

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#6
June 29, 2009 at 15:26:08
The DKV4D CPU runs at 166MHz frequency (aka 333MHz FSB). The RAM should run at the same speed even though it's rated to run higher. Go into the BIOS, change the RAM setting from AUTO to Manual, then configure the RAM to run at 166MHz (DDR333). Manually set the timing to 2.5-3-3-11 & set the RAM voltage to ?? (2.5v, 2.6v, 2.7v). I don't know which voltage your RAM is supposed to run at...either check the label or the Corsair website.

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#7
June 29, 2009 at 17:15:28
Thanks that makes sense.
regards

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#8
June 29, 2009 at 18:59:38
jam, check your PM.

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#9
June 30, 2009 at 03:53:51
Went to my PM centre. nothing there.

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#10
June 30, 2009 at 04:49:24
What is your motherboard make/model?

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#11
June 30, 2009 at 07:49:32
Gigabyte GA 7VM400AM.

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#12
June 30, 2009 at 17:19:45
OK, nothing strange going on with the motherboard. Try your voltage settings at 2.7v; follow the instructions jam gave in Response Number 6. Seems 2.7v might be required for this stuff?

http://forum.corsair.com/v3/showthr...

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#13
June 30, 2009 at 18:00:32
Thats a good link. All your answers made me think, and I may
have cracked this prob. I had a VS512MB400, with a
VS512MB400C3. Ive now changed to two VS512MB400. My
system has not crashed since. I am still letting the BIOS use
default SPD to sort out the timing and voltage. If the probs
has really gone I will leave it. If it returns I will change to
manual and adjust as suggested. Never realised that
matching memory sticks was so important.
Many thanks for all the support
Regards.

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