My idle is about 50°C, it's already high, but when i turn on Prime for example for testing the temperature goes to 100° in one of the cores and 90° in the others in 30 seconds. The sensor might be broken or the cpu is really burning? I have currently the intel cooler that came with it, which cooler should i buy? I heard CM hyper 212+ is quite good
I'm using core temp, I have already cleaned thermal compound and replaced it and then took of the dust from the entire thing. I have one side 120mm cooler and one cooler at the back of the desktop, both pushing air away from the internal part. I'm not sure a Hyper 212 will fit, i dont own a big desktop, regular size will fit it?
Did you ensure that you seated the heatsink properly? Intel heatsinks are such a PITA to install. Check the twist screw things, make sure they are all correctly twisted. Check to make sure the heatsink is sitting evenly on all parts of the CPU.
I would recommend something that screws into a backplate instead of something that uses push-pins.
The Hyper 212+ or 212 EVO are a bit of a handful to work with but they cost around $30 and perform like $60-80 HSFs so they are well worth the trouble if they fit on your board and in your case. When my C2D-E8400's stock HSF became ineffective, I replaced it with a 212+ and have been quite happy with it.