Like the title says, I have an 7800GT that has served me well for 2 years until now. I just noticed a sudden drop in framerate while playing TF2 that happens after 5-10 minutes of playtime. I downloaded a temperature monitor and low and behold I'm sitting at 88 degrees celsius. This just randomly happened last night, and the only thing that changed was I upgraded my Hard Drive, which shouldn't matter, I would think. Anyway, what do I do about this? The fan on the cooler isn't broken or anything, as far as I can tell.