The F-5 Bios was supposed to correct the temperature sensor to make it a little more accurate. Well if that's the case, I've been running a lot cooler than I thought. I used to idle around 35-37 in about a 78 degree room. I am now sitting at 25 degrees at idle with only a climb to 35-37 under Prime95 load. Wow, now I am impressed with my 900U. Just thought I'd let you guys know the good news. 