Hi, I was wondering if anyone could help me out with a problem I'm having. Ever since I got a new case for my computer my framerate drops drastically after a while in game. I know it's an overheating problem, but temperature readers out there don't specifier which part of my hradware is actually overheating. My Graphics card and processor fans seem to be going fine so I can only assume that it may be my PSU that is overheating, it's 375W, is that wattage to low to deal with a Geforce 5700fx card?

Probably the graphics card but in the end I don't thing it matters WHICH PART is overheating. The point is (clearly layed out in your own statement) that the problem started with the new case. Whatever part is over heating, is doing so because of a lack of casing venting. More fans...More fans...more fans.

I thought about that, but it appears that both the processor and the graphics card are getting enough air, and if it's the PSU any fan I put in there isn't gonna make it any cooler becuase it's encased.

If the PSU is overheating you would see a lot more in terms of problems then just dropped frames. There are a few things however to keep in mind about dropped frames... it's usually caused by speed problems. A time lag to be more precise. Your graphics card (or some part of it anyway) is processing information faster then it is getting it. There could be a lot of reasons for this other than overheating... fragmented harddrive, harddrive too slow, too many background processes running, harddrive DMA not enabled... anything that could slow the flow of info from your drive to your processor and graphics card would be suspect.

Thanks for the advice, but I assume it's an overheating problem as two sensors on my motherboard are 70+ celsius, although I do not know where the sensors are on my motherboard which makes it hard to find which piece of hardware is the problem.