Memory Conflict with all slots filled

[CAD-man]

Hello,

I just upgraded my work computer by adding a P67A-D3-B3 Rev 01 MB, i5-2500k cpu & 16GB Corsair Vengeance (4X 4GB 1600) DRAM. All Bios settings are at default running Bios version F5. Other key components are LSP Ultra 750W PSU and GeForce 460 GTX Video with 768 mb GRAM. Running Win 7 Pro with all updates.

With all slots populated, if I'm lucky, Windows will run for a few minutes before the blue screen of death. It actually ran long enough one time to run Passmark, but following that, it quickly got so Windows would not completely start before the blue screen, even in safe mode. The system runs pretty well with two slots empty (8 GB), though I did get one blue screen.  It seems most stable with three slots filled (12 GB) and no blue screens so far. I saw on one post somewhere that I havent't been able to find again that the memory voltage needs to be increased if all four slots are filled. Could someone please confirm this? If anyone has any other suggestions, I would apprecite it. I do mostly CAD work and solid modeling and need all the computing horsepower I can get.

Thanks

[Aussie Allan]

  Welcome CAD-man

  It really does sound like a duff memory module  mixed in there somewhere.

  Memtest in slot one......one stick at a time.....10 full passes each......I think you'll find just one will fail but check all.

 Post back with your results, and two!.....are you using a XMP profile or just bunging them in the slots and firing up the PC ?

 Aussie Allan

[Dark Mantis]

Hi and welcome.

You are quite correct in what you read previously about the voltage but it is not quite as simple as that. If we assume just for the moment that all your memory modules are working correctly then you will need to enter all thew timings and default voltage into the BIOS. These settings should be printed on the side of the modulkes or packet they came in.

Once completed go to the DRAM voltage and increase that from 1.5v (default) to 1.55v. Then find the QPI/Vtt setting and make sure that it is within 0.5v of the DRAM voltage otherwise damage to your controller(CPU) will occur. Save and boot.

If you have any problems then try increasing the QPI/Vtt setting a touch and then try again.