Hey, I have a brand new HD7870 in my Core 2 Duo E6850 machine (Win7) with 4GB or RAM. I get low fps (like 20-30) whatever the game settings I put in World of Tanks (from low to very high) or older games. It never reaches the 60 fps limit. My resolution: 1680x1050. Furmark, OCCT, 3dmark Vantage return nice scores, in line with expectations for that videocard. Unigine Heaven, everything to max, returns FPS between 10 (min) and 80 fps (max) with a nice score. GPU and CPU usage are low while gaming (10 to 50%). High in benchmarking (close to 100%). Did not try it yet (not at home for a few days), but another forum tells me to update drivers, especially audio drivers. IIRC I use the default windows drivers, so they are pretty old!