E8400 overclocking on P5N-D motherboard problem

[hurricaneice]

Well here is the problem I am having. When overclocking my e8400 to 10%, 20% or higher (15% works) I usually get a black screen during boot that will not load windows. However if I do get booted into windows i usually get memory errors and/or it runs disk checks when im booting. I can overclock 5% without a problem and 15%. My cpu isnt running hot so I believe the issue may be my motherboard or possible ram timings/voltage. My question is what could be the problem and is there known issues I don't know about with this motherboard. BTW my motherboard bios is up to date and my RAM timings are on auto for this ram but apparently are specced at 5-5-5-18. Anyway here are the specs of my comp.

ASUS P5N-D LGA 775 NVIDIA nForce 750i SLI ATX Intel Motherboard - motherboard
Intel Core 2 Duo E8400 Wolfdale 3.0GHz LGA 775 65W Dual-Core - processor
- ZALMAN CNPS9700 LED 110mm 2 Ball CPU Cooler - cooler
CORSAIR XMS2 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 - ram
EVGA 512-P3-N801-AR GeForce 8800 GT 512MB - video card
Rosewill RP600V2-S-SL 600W ATX12V v2.01 SLI - power supply
Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA - hardrive



Thanks, would appreciate anyone's opinion/comments

 

[theAnimal]

Have you read the How To sticky?

 

[hurricaneice]

No, I will do that. Thanks