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Paul Smith,
Yeovil, UK.
Microsoft MVP Windows Shell/User.
http://www.dasmirnov.net/blog/
http://www.windowsresource.net/
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Use the NVidia monitor that comes with your motherboard to monitor the GPU
Temperature. The 8800 GTX runs hot as it is. You should also set it to run
under direct control, 100% speed, to help cool it. 9 times out of ten, if the
system's shutting down (not crashing) it's to stop the card from overheating
and prevent it from being damaged.
> > under a load, i have never seen my processor go above 78*C , and it idles
> > around 48* - 50*, so i don't think overheating is a problem. in addition
[quoted text clipped - 4 lines]
> Typically its graphics cards that do the overheating nowadays. But 78°C for
> the CPU is pretty warm.
Andy [YaYa] - 25 Sep 2007 18:56 GMT
> Use the NVidia monitor that comes with your motherboard to monitor the GPU
> Temperature. The 8800 GTX runs hot as it is. You should also set it to run
[quoted text clipped - 16 lines]
>> for
>> the CPU is pretty warm.
I'll echo what people are saying and add that your memory could be bad also,
you should learn how to use memtest86, download the iso, burn a bootable CD
and run memtest86 for at least a couple hours. If no errors come up then
great, if you get any errors that could be it, but 78 degrees, that's hot,
cool that system. Might help, might not. Since the system doesn't crash that
often gonna be hard to narrow this one down.
I'll assume you didn't go cheap on your Power Supply? inadiquate power could
cause this issue.
-A.
hkancyr - 25 Sep 2007 21:18 GMT
When I hear this sort of thing I think of power. Either the PSU is being
effected by the heat or the CPU isn't getting all the juice it needs for
the games.
I have that same Vid card and it is quite hot.
Do the easiest first, open up the case and get a fan blowing into it
and see how that goes. If that fixes it you got a heat problem. Get
120's instead of 80's. If not you probably got a power problem, you
could tweak the cpu voltage and see how that goes. Sometimes memory
voltage will do this too, but usually that will show during boot.
On the face of it your PSU sounds lovely, perfectly fine for your rig.
However, it could be bad or going bad.
Good luck.

Signature
hkancyr
Ultimate 64 QX6700 Badaxe2 4Gigs Corsair 6400 8800GTX 768 6X 500Gig 2X
160Gig
Andy [YaYa] - 26 Sep 2007 20:22 GMT
> When I hear this sort of thing I think of power. Either the PSU is being
> effected by the heat or the CPU isn't getting all the juice it needs for
[quoted text clipped - 8 lines]
> However, it could be bad or going bad.
> Good luck.
He listed his PSU as "Ultra x3 600 watt PSU" if that's not a generic PSU I
don't know what is.
I think Fry's Electronics out here sells these Ultra PSUs that look cool,
modular, LEDs all over them, but the PSU itself is crap can barely maintain
11.5 volts under minimal load.
Enermax, Antec, Seasonic are 3 brands of PSUs I'd recommend off the top of
my head. There are others... I just can't recall them offhand.
Irh2phsh, what power supply do you have? Is there a model # on it? If it
looks like something pimped out on "Pimp my Ride", we might want to make
sure you don't have a lemon under the hood that could cause some serious
damage to that nice video card.