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CPU Overheating

Recon801
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I've been using my pc for around 2 years without issue. Now it is suddenly running extremely hot. Even just sitting at the desktop has it running at 85-90C. 

 

Cpu is a 5820k overclocked to 4.5ghz at 1.275volts. I tried removing my OC just to see if there was any difference, but even at 3.3ghz stock voltage its still hitting 90C

 

Im using a corsair all in one cooler 280rad, and pc is dusted regularly. Could this be caused by a pump failure or something? My software monitoring shows fans and pump as operating normally. 

 

Any ideas are appreciated.

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Put a screwdriver/pencil against the pumps, and place it next to your ear. You should feel/hear the pump if it's working. 

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what @Zando Bob said,also is the rad warm to the touch?
might be worth a try to remount the cooler

 

i7 4790K | 4.5ghz @1.19v / 1080 ti strix oc  / Asus Z97 Pro Gamer  / 970 Evo 500GB | 850 Evo 500GB / Corsair 780t white|window  

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