My pc has been turning off about 10 min's after its been turned on so i checked the bios which said the cpu was at 128 C but when i touch the heat sink etc it felt nowhere near that. So i then went int CPUZ and it says around 60-70 idle. Its my own built pc and the cpu is an AMD athalon X4. Could it be a motherboard fail with the temp reader or something wrong with my cpu? i did jiggle around the heat sink a small bit and it hasent turned off yet but its not been very long.