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Overclocked cpu buzzing noise then shuts down

Last response: in CPUs
November 5, 2012 10:33:02 AM

I have an i7 3770k overclocked to 4.2ghz on a maximus gene v. when i convert files my cpu makes a buzzing noise, which is louder when i move my mouse and sometimes shuts down. My build is Thermaltake Chaser MK-I Full Tower Gaming , Thermaltake 750W Modular Power Supply. 80+ Bronze , Thermaltake Water 2.0 Extreme and Crucial 32GB kit DDR3 1600 MPN: BLS4KIT8G3D1609DS1S00.
a c 79 à CPUs
November 5, 2012 11:26:53 AM

November 5, 2012 11:56:26 AM

temps only reach 31 degrees celcius
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November 5, 2012 12:37:57 PM

If you decrease the clock a little does it still make the noise and shut down?
November 5, 2012 12:59:38 PM

if i drop it down to 4.0ghz it stops
November 5, 2012 1:05:06 PM

Are you messing with any of the voltages at all?
November 5, 2012 1:34:52 PM

no letting the software do it
November 5, 2012 4:54:54 PM

Could be a defective powersupply that can't handle the load required past 4.0GHz. Can you borrow another powersupply from a friend to test it out?