I've got a 3.2 hyperthreading and a 2.8 dual core in two different computers. Both run hot like you said, but if you set the heatsink well, you can get idles in the upper 30's with the 3.2 and mid 40's with the 2.8. Definitely get a good aftermarket heatsink, of the two I tried, I liket the zalman best. Both of those are LGA775 chipsets and the dual core neds a 945+ chipset, so your current board may not support either though. But of the two, I like the dual core better, it's faster for most of the things I do with my computers.