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Memory timings

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June 17, 2009 10:20:41 PM

I am not sure how to get my system to accept these memory sticks and remain stable for more than 20 minutes. I have:
(2 x 1GB)DDR 400 (PC 3200) http://www.newegg.com/Product/Product.aspx?Item=N82E168... and
(2 x 512MB)DDR 400 (PC 3200) http://www.newegg.com/Product/Product.aspx?Item=N82E168...

sticks installed in my http://www.newegg.com/Product/Product.aspx?Item=N82E168... motherboard with 32bit windows. I recently purchased the 2x1 GB sticks to add them into my machine. One of my questions is, which slots do I put which memory? Originally I had the 512 sticks with one empty slot between them. Now I have them in alternating order, 512, 1024, 512, 1024.

Also what should I put the voltage and timings at? Or at least, what do you recommend I try.

More about : memory timings

June 17, 2009 10:39:04 PM

Download and run CPUZ. Select the SPD tab and cycle through your sticks of memory. You should see at least a couple different settings for each, see if there is a setting that they all share.

Did you immediately go into the manual settings after installing? If you reset the board it will find settings for the RAM that should be compatible. After finding a base setting for them you can then try and manually improve the settings.

The JEDEC specification for DDR 400 is 2.6v so that's where I would start.
a b } Memory
a b V Motherboard
June 18, 2009 4:44:34 AM

moejoe22 said:
I am not sure how to get my system to accept these memory sticks and remain stable for more than 20 minutes. I have:
(2 x 1GB)DDR 400 (PC 3200) http://www.newegg.com/Product/Product.aspx?Item=N82E168... and
(2 x 512MB)DDR 400 (PC 3200) http://www.newegg.com/Product/Product.aspx?Item=N82E168...

sticks installed in my http://www.newegg.com/Product/Product.aspx?Item=N82E168... motherboard with 32bit windows. I recently purchased the 2x1 GB sticks to add them into my machine. One of my questions is, which slots do I put which memory? Originally I had the 512 sticks with one empty slot between them. Now I have them in alternating order, 512, 1024, 512, 1024.

Also what should I put the voltage and timings at? Or at least, what do you recommend I try.


Try increasing voltage to at least 2.80V.
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June 20, 2009 4:53:53 AM

The CPU-Z application is crashing my computer when I'm on the page to view the different slots of memory, any idea why? The computer is stable otherwise.
June 20, 2009 12:47:09 PM

moejoe22 said:
The CPU-Z application is crashing my computer when I'm on the page to view the different slots of memory, any idea why? The computer is stable otherwise.


I've had that happen before, I would suggest uninstalling it and reinstalling it.
August 5, 2009 12:13:08 PM

i don't think u can run different size sticks like that. if you are going to run 4 sticks of memory. they need to be the same size, such a 4x1gb or 4x512 .
a b } Memory
a b V Motherboard
August 5, 2009 8:13:57 PM

KOne said:
i don't think u can run different size sticks like that. if you are going to run 4 sticks of memory. they need to be the same size, such a 4x1gb or 4x512 .


Nah, you can run 2x1GB and 2x512MB to get 3GB, lots of people do it. But you can have motherboard problems running "any" set of four modules, since it's harder to get four modules stable.
August 6, 2009 6:18:51 PM

Not directly related to your hardware, but this reminds me of two similar cases in the past.

Intel's i815ep has 3 Ram slots, offers CL2 and CL3 timings, but the data sheet tells that the Bios should switch to CL3 if it detects 3 Ram modules, as the i815ep's buffers can't move heavy loads that fast. I don't know which mobo manufacturer followed the recommendation then. You could have a look at the P45's data sheet.

Asus did a nasty trick on the falsely praised TUSL2-C (with said i815ep). As soon as the user put the FSB over ~145MHz in the Bios (instead of 133MHz) the Bios switched the Ram to 3-3-3-7 and the AGP to 2x, without any remedy within the Bios' settings. Tweaking had to be done from special Windows applications.
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