The temps look normal for the CPU if you're running a stock heatsink. A good heatsink should get them down into the 40's. You should replace the motherboard fan, as the mobo is running a bit hot.
As to the low fps and lags, your video card is quite dated and should be replaced. Something in the area of a 8800 GT or 3870 or better would give you a substantial boost in the frame rates.
------------------------------Evil lurks in the databanks as it lurked in the streets of yesteryear. But it was never the streets that were evil.
Over 50. Seen it, done it, can't remember it, but I miss it.
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