I have already tried cleaning out the case, and remounting the heatsink on the processor, and reapplying thermal paste. Just far out of normal are the CPU and GPU temps though? I really don't know what they should be under heavy load. Also, if I need a new heatsink for my CPU, what's a good one? I'm not going for overclocking or anything, just cool and quiet operation.
The GPU temp isn't all that bad. A lot of GPUs can get that high under load. I do suggest trying to clean out the video card heatsink though. Pick up a can of compressed air for that. For the CPU however; I'd say a "normal" idle temp for an i7 920 would be something between 35-40 C. Load temps can get pretty high though. I wouldn't worry about anything 75 C or less.
As fa as a cooler goes...http://www.newegg.com/Product/Product.a ... 6835103065
Cool and quiet.