I have an i5 2500k with an Asus p8z68-v motherboard, I'm using the stock Intel cooler and I'm running at stock speeds / no overclocking. I'm getting idle temps of about 25 to 28 degrees Celsius, however when I start playing a game my temperatures rise very quickly up to the 70sC. I have reseated my cooler, re-applied thermal paste, checked voltage in my bios (everything is on auto for voltage), etc. This problem has just started and I never got temps like this before. What do you guys think? Is there a chance that my cpu is defective and I need to get it replaced by Intel?
May i suggest buying a Arctic Freezer 7 Pro Rev.2. I just got one for my athlon ii x4 640 and it never ever go's above 50 degrees, it has 6 copper heatpipes and pre-applied arctic MX-2 thermal paste. It's also really cheap and you won't need to take your motherboard out to fit it.
I don't know what else to do besides RMA the processor. I have an idle temp of 23 degrees Celsius but when I play a game the temperature rises to the 70s. If the thermal paste or cooler was set up bad, wouldn't I also have a high idle temp?