Hey guys,
I've just about had it with this game, it will not stop crashing. Sometimes i'm lucky enough to play it for as long as 30 minutes, but it will usually crash about 5 minutes in when i make a sudden turn around a corner or respawn. The error message is usually one to do with memory reference or something or other. I have 2 theories as to what is causing this(other then ut3 being the buggiest game ever):

1. I do not have enough ram to satisfy the games needs
2. My video card does not have enough memory to satisfy the games needs

Can someone tell me if they've found a way to fix this in the game or if it is indeed my hardware causing the problem. Perhaps people who are also having the same problem have similar hardware to me and we could conclude what is the cause. I have tried killing as many processes possible before and that didn't seem to help.

My specs:
Athlon 64 5200+
GA-M59SLI-S4
ATI Radeon X1950pro 256mb
1 gig generic ram
WD raptor 10000rpm 150Gig
Realtek HD onboard sound
Corsair 620W psu

Software that is usually running while i am play ut3 includes(ask if you want me to post process list as well):
Zonealarm
Symantec 2006 AV
Speedfan
Realtek audio manager
ATI icon in taskmanager

Oh yeah and if you happen to have another graphics card lying around try swapping them out.

Wow thanks for the reply's guys .

Ok so far physx7 i haven't even tried more then one of your suggestions and i think i may have found the problem. At first i thought it wasn't possible the video card was overheating but sadly i think it may be. Its about 4am in the morning over here in australia and its freezing. And to my surprise ut3 is not crashing/locking up, so i alt tabbed to my catalyst cc and found that my video card was running at 71 degree's celcius on this cold morning. So i can only imagine what its running at midday or night when my room is stuffie and hot. I will do some more tests then to confirm but its looking that way.

I think your card should handle up into the 90's max, but 70's sound kinda warm. Have you tried blowing a fan on it yet?

ok i tried blowing a fan into the computer and got the cards temperature down to 60C while playing UT3 yet it still crashed and even rebooted. Everything in the computer was running really cool due to the pedestal fan so i think i can rule out overheating. I'll move onto another of your suggestions, also I'll install wow to see if the computer runs ok on that game, though I'm quite sure ut3 is my only problem.

1. Try update the drivers.

2. Get the patch: http://www.gamespot.com/pc/action/ [...] de=patches

3. Don't worry about temp, the 8800 is hot but handles the temp quite well... (why are you measuring the temp with ATItool?)

4. If anything at all is working, uninstall the game, clean up your reg (ccleaner is doing the job quite well), defrag and reinstall the game.

Usually the graphic engine (Unreal engine) is working more efficiently than other engines... so do also a memtest if nothing happens.

Waiting for your updates.

Now that is kind of dangerous for someone who doesn't really understand what they are doing... I know some people who avoid reg cleaners like the plague.

I don't have problems with any of my other games, Bioshock, Crysis, Assassin's Creed, The Witcher, Orange Box. Although I think when I updated my drivers from 169.44 to 174.xx is when i got the crashes in UT3... hmmm gonna go switch to 169.44 and run UT3 to see if I have an issue.