Bricks on the screen

having some new sort of problem now today twice my computer got some violet coloured small bricks all over the screen and then it got hang i have never got this prob before . plus last night i downloaded the game cryostasis and when i checked the gpu temps they were primary 105 c and secondary 75 c i dont think this is normal. my idle temps are high to 60 and 48 . is there something wronf with the gpu because it got overheated . my cpu is q6600 and is oced to 3.6 can this may be the problem.

Those 'bricks' are called artifacts. Basically what happens is the GPU isn't able to full render the scenes and so it spews out those partially rendered blocks. In your case it seems to be caused by overheating. what card do you have (brand and model please)?

The OC on the CPU shouldn't effect the GPU. The front side bus connects the CPU and the northbridge. When you overclock, you increase that speed. It does also increase the memory bus speed, but I'm pretty sure the PCI bus is excluded. You can overclock your GPU independently from your FSB with software.

I'll go into specifics once I know what kind of card you have that's overheating.

they are palit 9800 gtx+

They? So you're running 2?

How long have you had this exact setup? With that CPU + 2 GPU's + HDD, etc. there's a lot of heat being generated, you might want to reconsider how the air flows through the case.

What'd you use to check the temps? Try running the same game / setup as your numbers above but open the side of the case so it's all just exposed. Do you know about what your ambient room temps are? The 60C is kinda high for idle, the 48C is closer to normal temps.