My pc turns off unexpectedly while playing Cod4

Hi there,

Got a strange problem with cod 4, while playing the game on certain maps my pc will suddenly turn off. as if someone has reefed out the power cord.
The only thing that seems to prevent it is playing cod4 in the games "safe mode"
Only other information i can give is that my keyboard/mouse are still lit up after this happens as if the pc was still on.

My computers specs are.

Asus Striker 2 Formula motherboard
2 * 2 Gig DDR2-800 Corsair XMS2 ram
NVIDIA GeForce 9800 GX2
Supreme FX 2 Sound Card
840 watt shaw p4s6 Power supply
Dual Core Intel Pentium D 945, 3400 MHz CPU

OS - Windows XP PRO Sp3
OS hard drive is a 250gig seagate barrucuda 7200

Temps are:
GPU - 74C - under pressure
CPU - 50C normal, 60C under pressure
motherboard - 44 C
hard drives are all around 33C-40C

All drivers are completely up to date and any programs that could conflict are disabled while i play.

anyone got any ideas? this is a regular thing whenever i play cod4 not in safe mode.

thanks for the input, that is quite a possible solution. however, i can run games that have MUCH higher requirements that put alot more stress on my computers components without any lag or any complications, like my computer turning off, considering that anything else you can think of?

Yeah the shaw was just a quick fix to power my new graphics card when the old one died/didnt have appropriate connectors, didnt event think about brand at the time =/

Ah hi again guys,

I have the option of using a 700 watt ATX12v PSU
model number is m12 700 (brand is sea sonic)

The thing is, my dad tried to use this PSU in his quad core q9550 setup with a high end graphics card (geforce 9600). When he tried to use the above power supply the computer would only run 1 hard drive and 1 dvd drive
if anything else was plugged in he would lose video or it would simply not boot. Ended up having to use a 512mb graphics card instead to run all of his HDD's.

Would this PSU have enough power to run my rig? (details in first post)
I have 3 hard drives internally, (Two 500gig seagate barrucadas, one 250 gig seagate barracuda), 2 DVD RW drives.

As for the comment about Demigod, im actually playing it at the moment and havnt had a single problem.

Thanks

do u get the BSOD? i a plying the game too but i crash every like 5 hours. so i crash sometimes. i just put up the system fans for my GPU and cpu. it helps. i use to crash every 1 hourwithout high fans. try that. alot of ppl have been having his also its not just you. i freeze in game sometimes and i cant get out so i have to restart computer.. get back at me if u find a solution

Best advice so far has been PSU related.

I would seriously entertain the idea that your PSU does not have proper amperage per rail to run your current setup. Look into grabbing a bit larger PSU with proper ratings per amp/rail.

Also, check all of your connections just to be sure something isn't shorting out--and check that your motherboard is securely seated.

In all honesty, this sounds just like a PSU issue I cured for my cousin recently. He built a PC with a mid to low end PSU, and it would do the exact same thing your machine is doing (shut off instantly during gaming). I slapped in a new PSU with proper ratings and it works great now.

Try to turn off the sound. sometimes it is a culprit.