im running on air cooling too, and ive oced my 9800gtx a bit and my e8400 (3ghz -> 3.6ghz). atm its 52/51c but can go up to 65-70c on full load. could use an extra fan
edit: -10 degress, real temp showed the right values^^, but Ive OCed it to 3800mhz now so its around 44/45c with a few programs up.