Hi, After some debate with myself, the forum and my wallet I decided to give my mac pro 4.1 a new life. So the 4.1 2.66ghz quad core with a ati 4870 is now a 5.1 3.33 six core with a GTX 670. Luxmark sala cpu gives: 553 Luxmark sala cpu and gpu gives: 1733 was 595 Only concern, as I'm not that experienced in thermal pasting, is the temperature. When doing luxmark with temp monitor the cpu a temperature diode goes up to 70 degrees celsius. I normal working mode temp is around 35. But I notice that the fans keep spinning. I did a pram reset. Is this ok?