Hi. I've build a pc for my daughter and i got a G3450 cpu for a fiver from CEX and the computer keeps shutting down and restarting. The cpu is fitted with a stock cooler on a Asrock Z97X killer MB. 16gb 2400mhz ram ( set at 1600mhz) and a GTX 1060 I noticed the cpu in the bios idles at 40.C. To me it seems quite high. MB temp inside the case is around 22.C. What do you think could be causing the issue? Cheers.