I've got a amd 760k quad core and it's gone up to 80 in idle mode put it goes up and down from 53 to 85 within seconds I know this is bad is it my fan or ther paste I just don't know what to do to keep it down
It sounds like you installed the cooler wrong. Make sure the heatsink is making contact with the CPU, there's thermal paster between the CPU and heatsink (only a small amount/what came pre-applied on the heatsink) and that the heatsink fan is running once the PC is turned on.