Comp crashes playing high end games

Hey guys,

Recently my computer has been crashing when I have been playing graphically intensive games (Company of Heroes, Call of Duty 4, Crysis, etc.) I either get the blue screen of death that announces that the “physical memory is being dumped” or it just freezes. This has been a recent development, before I could run all these games at maximum settings. When I posted about this before most of the replies I got said that I should check for overheating. I checked that all my fans are working properly, cleaned out all the dust from my case, and I even took off the side panel of my case and blew cool air into my comp, but still the same results. I ran a few stress tests on my computer and confirmed that both my CPU graphics card are within a safe temperature (my GPU was the hottest, but it never gets past 80C). Here are my specs

ASUS P5B Deluxe/WiFi-AP Socket T (LGA 775)
Conroe e6600
SAPPHIRE Radeon X1900XT 100149 Video Card
Segate Barracuda 7200.10 320GB 7200 RPM 16MB Cache SATA(x2)
CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
Samsung 204B
NeoPower 550W
Antec P-180B Case


My friend mentioned that this might have something to do with my RAM, but I have no idea how to find out. Also I did have to ship my computer through FedEx, So I wouldn’t be suprized if that has something to do with it (I did check all my parts and wire and everything seems ok though).Thanks for the help,

Bryant

i had a similar problem at one time and it turned out to be my power supply

http://www.memtest86.com/

this should help with the ram although you could try lowering timings, speed and what not first to see if that helps, my ram is screwed and runs at lower timings as i also got BSOD's. Strangely enough that was over a year ago and i have never gotten around to buying more.

Monitor the 12V+ voltage while you stress the cpu and video card. If the voltage drops significantly below 12V, something like 11.5V or lower, then your psu is probably failing. You can use Speedfan to check the voltages. Just look for the one that reads close to 12V while idle.

Im having a similar sort of issue, my x1900 xtx has always overheated periodically but its started crashing to a chequered screen in almost every 3d application after some time. More stressful 3d applications cause it to crash quicker but the temperature climbs to above 90 degrees C pretty quickly. I checked my voltage on speedfan, and the +12V never goes above 1v let alone drop below 11.5V. All the fans are unobstructed and clean, performance feels unaffected although when playing Planetside the GPU makes a small whistling noise which becomes more audible as larger renderable environments come into view.

Any ideas? Cheers.