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PC stable with one dimm but not two.

post #1 of 9
Thread Starter 
Hi guys,

I'm seeking some advice in regard to my PC.

Spec: Amd Bulldozer 8150 @ stock
Mobo: Gigabyte 970A-D3
Memory: Kingston DDR3 1333mhz 9-9-9-24 or 25 (iirc the timings correctly).

I have two PCs of identical spec, there's no issue with the first. However, with the second if I use the two 4GB dimms the pc is unstable and reboots without any BBCode (Anything from 25 minutes to 15 hours)- There is also nothing in event log either. The system is stable (24 hours of prime95) using either DIMM in a combination of the different slots.

I'm a little confused as to what might be causing this?
I'm thinking of taking the dimms from the stable PC and using them in the unstable PC to see if the result is the same?
The reboots only seem to happen under load - The Pc was on and stable for about 5 days idling.
post #2 of 9
Stupid question,

You are putting them in their respective slots (I.E they don't go into slots next to each other)

Also, have you overclocked the machine at all?

If it's a no to the overclocking then i'd say push through stock volts and try again. Also, check your northbridge settings to make sure they are identical.

Comps
post #3 of 9
Thread Starter 
Sorry that post was cut a bit short was at the end of my break at work. Thank you for your reply.

They are in the correct slots (dual channel) 2x white and 2x blue slots 1/3 are blue I think and 2/4 are white.
If I put the memory into the blue slots the PC fails to post (no bleeping codes either)

Both machines are using identical bios and bios settings // There are no overclocks on either machine.

The memory is running at 1.5v which is the stock settings. would it be worth me bumping it up to 1.55v just to ensure that it's getting enough voltage?
Also is it worth me increasing my NB voltage very slightly?

Cheers,

Ben.
post #4 of 9
Thread Starter 
Sorry that post was cut a bit short was at the end of my break at work. Thank you for your reply.

They are in the correct slots (dual channel) 2x white and 2x blue slots 1/3 are blue I think and 2/4 are white.
If I put the memory into the blue slots the PC fails to post (no bleeping codes either)

Both machines are using identical bios and bios settings // There are no overclocks on either machine.

The memory is running at 1.5v which is the stock settings. would it be worth me bumping it up to 1.55v just to ensure that it's getting enough voltage?
Also is it worth me increasing my NB voltage very slightly?

Cheers,

Ben.
post #5 of 9
Thread Starter 
Sorry that post was cut a bit short was at the end of my break at work. Thank you for your reply.

They are in the correct slots (dual channel) 2x white and 2x blue slots 1/3 are blue I think and 2/4 are white.
If I put the memory into the blue slots the PC fails to post (no bleeping codes either)

Both machines are using identical bios and bios settings // There are no overclocks on either machine.

The memory is running at 1.5v which is the stock settings. would it be worth me bumping it up to 1.55v just to ensure that it's getting enough voltage?
Also is it worth me increasing my NB voltage very slightly?

Cheers,

Ben.
post #6 of 9
Thread Starter 
Sorry that post was cut a bit short was at the end of my break at work. Thank you for your reply.

They are in the correct slots (dual channel) 2x white and 2x blue slots 1/3 are blue I think and 2/4 are white.
If I put the memory into the blue slots the PC fails to post (no bleeping codes either)

Both machines are using identical bios and bios settings // There are no overclocks on either machine.

The memory is running at 1.5v which is the stock settings. would it be worth me bumping it up to 1.55v just to ensure that it's getting enough voltage?
Also is it worth me increasing my NB voltage very slightly?

Cheers,

Ben.
post #7 of 9
Wow,

a quadruple post, epic.

No, take the memory out of the machine that's working, put it into the machine that isn't, if that fails, it's the board, if it doesn't fail it's the memory.

Comps
post #8 of 9
Thread Starter 
omg, the work pcs all run from the network and are terribly slow I'll remove the others lol.
post #9 of 9

If nothing happens in those blue slots, one or more of those two slots may be simply dead.

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