EVGA mobo or Memory crashing my computer?

[ERay1288]

I just recently bought a new motherboard, the EVGA nForce 750i FTW along with two sticks of OCZ (2 gigs, 1066 mhz) of DDR2 ram. I used to run my same system on the MSI P6N Diamond with 3 gigs of Ballistix Tracer (1 gig, 800mhz) of ram with no problems. However, since "upgrading" the mobo and to 4 gigs of 1066 I've been experiencing some crashes, most notably after playing games (company of heroes) after about 30-45 minutes. Also, when I'm watching videos it starts to stutter 30-45 minutes in and I'll have to reboot my computer to get it running again. Is this a problem with the motherboard? Memory? I have not over clocked or touched FSB/Voltage, as I left everything on "Auto" in the bios. As far as I know, from SpeedFan, my computer is not over heating. The hottest core is at 51C and the GPUs are around 55-60.

The rest of my specs are:
Q6600 quad core 2.4ghz
XFS GeForce 8800GT (X2)
600 watt Rosewill SLI ready power supply
Windows Vista 32bit

Thanks, let me know if you need more information.

 

[roofus]

did you manually set your memory voltage and timings by chance?

 

[ERay1288]

Nope, I left it on Auto.

 

[roofus]

if its crashing, i would bet your running too light on your RAM voltage. the EVGA boards default at a lower RAM voltage than most of the performance memory you buy. on the package your RAM came it it should state the required voltage and timings.

 

[ERay1288]

Thanks! I raised the voltage a bit, and I was able to finish an entire movie and it ran as smooth as butter. I haven't tried running a game yet, but I'll try that tomorrow. So far, so good.