Yesterday I installed a new Hard Drive and placed the cables in rubbish positions. I eventually found that one cable was leaning on the CPU fan and stopping it spinning, causing the CPU to overheat and shutdown. After tidying the cables and letting it all cool down overnight I switched it on this morning. I noticed that it’s been running hotter than what I thought. It seems to reach 51°c after about 5 minutes of Prime95 (on the Blend option). Do you think this is to Hot? Dave EDIT: Its the older Socket 939 Type.