i have just finished building a system for my brother in law. Intel mb and Celeron 2.5ghz CPU I have been running it for the last day and a half(not contiually)to make sure it is ok. I have just loaded XP Service pack two and then I checked the CPU temp using sisandra, to my amazement the temp was 12%Centigrade 50.4 Farenheit. This is the lowest temp I have ever seen on any of my systems, the fan is just a bog standrd CPU fan can this be right? or is sisandra recording a wrong temp somehow. I checked it a few mins ago in the BIOS and it is recording 50C now that is more believable if not a tad hot, now it is 29C it seems to be a bit irratic.