PC crashing after new ram.

I recently installed new Motherboard (ASUS p5n-d 750i) and got a new CPU Intel core 2 quad 2.66GHz.

it was running with ddr2 667 ram just fine i did the prime95 torture test for hours my cpu never went over 50c and pc didnt crash. so when i got my DDR2 800 mushkin blackline ram 4-4-4-12 timings. a few minutes of playing farcry2 or world of warcraft it would completely freeze and ill have to reset with power button. any ideas what the problem could be?

PSU: OCZ StealthXStream OCZ600SXS 600W ATX12V / EPS12V SLI Ready Active PFC Power Supply
Mobo: ASUS P5N-D LGA 775 NVIDIA nForce 750i SLI ATX Intel Motherboard
CPU: Intel Core2 Quad Q9400 2.66GHz 6MB L2 Cache LGA 775 95W Quad-Core Processor
Ram: Mushkin Enhanced Blackline 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit

if any further info is needed plz ask :). really want pc to start working properly already thnx.
3 answers Last reply
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  1. Probably the ram voltage needs increased.
  2. ive never OC or messed around with the bios for increased performance.

    i know my way around the bios ive messed around the menus just to see what ppl are talking about but never actually applied any settings.

    how high should voltage start at?
  3. hmm i saw this feature on my bios settings and it says OC by 5, 10 ,15, 20% so i selected 10% and SO FAR it hasnt frozen Completely *crosses fingers* prob mobo fix something with ram but hopefully it stays that way
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