I purchased 4 4gb ddr2 sticks. All four work but not at the same time.

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J

jdonalds2001

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Oct 3, 2014
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I purchased 4 4gb ddr2 sticks. All four work but not at the same time.

I tested the sticks by plugging them in 2 at a time and they work for a week with no problems. So all 4 sticks are good.

I've tried 2 of the 4gb sticks with 2 of my older 2gb sticks for a total of 12gb and the computer works fine. Take out those 2 4gb sticks and plug in the other 2 and it still works fine.

I can plug in any 3 of 4gb sticks and 1 2gb stick and the computer continues to work fine with 14gb total.

Whenever I plug in all 4 4gb sticks the computer runs but blue screens about once an hour.

Any ideas on what the problem might be?

Thanks,
John
 
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Tradesman1

Tradesman1

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Jun 5, 2013
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Couple of thing probably 1) did all four sticks come in a single package? If not they may need adjustments to play nice together, and 2) to run 16GB w/ four sticks might have a weaker MC (memory controller) (this is very common on AMD rigs, not so much on Intel, but it happens, may need a bit of extra voltage to the DRAM or the MC - What mobo, CPU and model #(s) of the DRAM?
 
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J

jdonalds2001

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Thanks so much for answering.

They were all in the same package. I do have an AMD motherboard. How would I crank up the voltage? Is that something that can be done form the BIOS?

Motherboard: M2N78-LA (Violet)
CPU: Phenom X4 9750
DRAMS: Samsung 16GB 4X4GB DDR2-800MHz PC2-6400 240PIN PC6400 for AMD CPU Motherboard (361131163192 )
 
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jdonalds2001

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Interesting. This page shows it supports 16gb. The computer model is HP p6130f

http://support.hp.com/us-en/product/HP-Pavilion-p6000-Desktop-PC-series/3942799/model/3998968/document/c01775369/

And here also

http://support.hp.com/us-en/product/HP-Pavilion-p6000-Desktop-PC-series/3942799/model/3998968/document/c01635734

Two web pages on the same motherboard- two different memory configurations.

Computer properties shows 14GB installed so it recognizes more than 8gb.

Windows Task Manager (Windows 7 Home Premium) shows Total physical memory 14335 MB. The Resource Monitor shows Installed 14336 MB


 
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J

jdonalds2001

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Well there was a BIOS update but there are no controls for timing or voltages. I guess I'm stuck with a max of 14 GB, but that's not bad. I have noticed a performance improvement since upgrading from 8 GB.

I do believe it is a power issue. I'll bet with the four 4 GB modules plugged in there's just enough additional current required to pull down the 1.8V. Too bad I can't do anything about it.
 
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