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Why is my cpu much hotter when I run IBT?

post #1 of 6
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When I run IBT (high, 8 threads) the temps go to 82c on 4.5 ghz 1.36v

When I render something the temps only go to 70c ... and rendering also puts 100 %load on the cores.

IBT gave me an " unstable system" error dialog box, but I think that's just because it was going to 82c

and this was just the first run in IBT...
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post #2 of 6
Because IBT stresses all of the CPU,whereas rendering will use limited amont of total resources eg;L1,L2,L3 Cache,IMC,etc,etc..

IBT/stress tests do this to check all of the CPU,not just the cores are stable.Does this to delibratly create maximum possible heat and power draw.
post #3 of 6
A some small things also include AVX and HT.
    
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post #4 of 6
It's designed for max heat/power draw. Nothing you do real-world will ever create that much heat.
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post #5 of 6
If it's 82c during IBT, please lower that overclock now !
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post #6 of 6
did u know that?

Intel burn test puts more stress than anything,...

but,..when IBT said "error" message,it would be ur OC is unstable,..
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