Ack!, Ack Ack! If your computer is freezing while playing any game the LAST thing that you want to do is overclock anything!!!
If the game is freezing then you need to find out what is causing the problem. It could be a lot of things.
mabye....
your pc is running too hot
the game sucks & has lots of bugs
you have old video/audio/other drivers causing the game to crash
The LAST thing you want to do is overclock anything & run your PC outside of specifications when the
ing program is crashing. Doing so is asking for trouble.
If you really want to find out what is causing the problem go get
http://www.memtest86.com/. Burn a cd of it. Let it run for 4+ hours. Do you get any errors? If yes your memory is hosed. Goto crucial.com & buy memory for your system. Don't skimp and get shitty memory. Just don't do it. The extra $20 you spend at crucial.com for the right memory will be worth it.
If memtest86 worked fine the next test is to get
http://www.mersenne.org/freesoft.htm. Install it & run a stress test for 4+ hours. Does you PC crash this time? If no, congratulations. Your Pc's processor, memory & windows installation are all happy & working well together. ( no small feat!)
If mersenne worked, the next thing to try is run the mersenne stress test while doing the latest freebie 3dmark test available from
http://www.futuremark.com/download/. Does your PC crash while doing both the mersenne test & the 3d mark test? If yes then the combination of your CPU and video card running at full tilt is too much for your PC. If that is the case I would upgrade my video drivers and try again. 3dmark is a great test. You can be reasonable certain that the 3dmark test runs without major bugs. Something you can't always say about the latest game.