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i7 870 on Asus P7P55-M Throttling at 70C

Soldato
Joined
28 Jan 2010
Posts
3,188
Location
Guildford
Trying to help a friend with his overclock but I'm a bit stumped. Running prime or Burn test his CPU seems to be throttling (dropping to 1.6GHz) at about 70C, as far as I was aware these chips aren't supposed to throttle until 99C?

Things we've done:

Update BIOS
Disable Speedstep/C1E etc

The motherboard doesn't have the most advanced overclocking options, however it has all the basics and I can't see why it should be throttling so early.

We're at 1.32 Vcore, 1.65V on the RAM (OCZ special ops). I've already looked around on the web for solutions but none of the suggestions seem to have helped so far. Using 22 multi and 182 BCLK.

Also please don't point out that the Tcase Intel spec for the chip is 73C, The core temp is not the same as the Tcase temp, Tcase is nowhere near what's supposed to be the throttling temp.

edit: tried using Realtemp, HW monitor, Coretemp, Speed fan to monitor temps, all say the same.
 
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