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Core temp and Cpu temp.. which is the important one?

Last response: in CPUs
June 20, 2010 4:59:10 PM

Hi guys,
The cores on my i5 750 are around 74oC on load(3.8GHz) though however Asus AI Suite shows the CPU temp to be closer to 60oC.
I know i should not be exceeding 80oC on full load, my question is does this 80oC max overclock refer to the Cores or the the CPU temp?

Thanks for any help,

EDIT: on a side note, do you think 78 Celsius Core is to hot for 100% load(Prime running for 4 hours so far). Using Coolermaster V8 on 100% with AS5. CPU is currently @ 3.8GHz @ 1.216 VCore
June 20, 2010 5:24:16 PM

not very good temps for a good coolewr...
a b à CPUs
June 20, 2010 6:17:29 PM

The Coolermaster V8 is only an average cooler (the fan that comes with it lets it down), but even then you should be 8 degrees lower than that on 100% prime95 load.

You may need to reseat your cooler and redo your thermal paste - you possibly used too much or haven't done it right.

Personally I'd use CoreTemp and RealTemp for measuring temps - they're more widely used (and more trusted) for reading Nehalem chips.
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June 20, 2010 8:05:56 PM

Thanks for the replys :D 

I decided the temp was rather high, so i took the case apart and had a go at tiding some more of the wires away, i also moved my 120mm Akasa Viper fan into the HDD bay which the parallel to the V8 intake side. Just incase i applied the termal wrongly i took the V8 off and put another pea of AS5 in the centre of the CPU, reattached the cooler and rebooted up.

CoreTemp is now showing 'slightly' lower temps. I was seeing the highest of 78oC during the 4 hour prime test, now after only 20mins of blend im seeing 74/74/68/72.

I dont know if i have just got a bad cpu or if ive failed to turn of, or i have turned on something that i shouldn't. I should also point out i have Load Line Calibration Enabled..with it disabled i have seen temps of 5oC lower.

This is my previous Overclock which had load line disabled, my vcore at 1.3 if i remember correct. Since then i changed the FSB to 200 and multiplyer to 19 to get 1600MHz from my memory.

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a b à CPUs
June 20, 2010 9:39:02 PM

Ideally you should've cleaned off the existing AS5 before putting a new batch on, and Arctic Silver recommend the line method across the cores for Nehalem chips, but these are trivial matters.

Have a look at your Vcore. I recently did a 3.6GHz OC on a i7 920 with a Vcore of 1.2 and never topped 70 degrees with a badly-seated Titan Fenrir and sh*t thermal compound, so you should be able to do a big voltage drop to ease off some heat.

Also, have a go putting the Viper in the V8 and see what that does - the V8 gives poor (for the price) performance with its stock red LED fan, so see what effect using a decent fan has.