I have been having this problem with my computer for a while now. When playing games with advanced graphics, the screen will freeze and there will be a high pitched sound coming from the computer.
We have a 256 MB graphics card, 1024MB RAM, 2.8Ghz Pentium 4.
We figured it was the power supply, so went out and bought a new 400W supply. The problem is still happening though.
Any ideas on what the problem could be or how to fix it?