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i7-4770k and Cooler Master Hyper 212+; 38C idle and 77C under load (3D render with Terragen) - is 70C too hot for sustained use?

post #1 of 11
Thread Starter 
Hello. Before I attempt to overclock, I am scoping out this new processor and air cooler to find a baseline.

Ambient temp is 27C in the living room right now.

Idle CPU temp is 38C. When doing a test render in Terragen, the CPU's temp goes up to 77C.

Is 77C going to be too hot a constant temperature for renders that will take hours to do?

My goal is to have this thing last for more than three years...

Thanks!
Edited by Thermodynamic - 10/25/13 at 6:58pm
    
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post #2 of 11
What are you using to read CPU temp?

What case do you have and what is case fan placement?

What is the air temp going into cooler versus your room temp?

I use a cheapo digital indoor/outdoor wired remote thermometer with a stiff insulated 15cm wire twisted into the end to help position sensor in front of CPU / GPU intakes.. and wherever else you want to check air temp in case.
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post #3 of 11
you could delid it and reduce temps by 20 30 degrees. check intel forum
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post #4 of 11
77 under load at stock clocks seems high to me. My 3570k at 4.2 (I know, I know) hits @ 68 under load on the hottest core.
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post #5 of 11
Quote:
Originally Posted by BulletSponge View Post

77 under load at stock clocks seems high to me. My 3570k at 4.2 (I know, I know) hits @ 68 under load on the hottest core.

Ivy and Sandy are different beasts, and so is i5 vs i7.... Haswell could melt Hell it's so hot. Many Haswell i7's throttle using the stock cooler because they reach 90-100C

Under 80C for 24/7 use is just fine.

You might lower temps a couple degrees by adding a second fan to the 212+ for a push/pull config. You might also consider an Antec Kuhler 920 or Corsair H80i or H100i to keep temps lower and to negate some fan noise thumb.gif
post #6 of 11
I use Tcase as a conservative safe limit.
i7 4770K Tcase is 72.72c
post #7 of 11
Thread Starter 
Update:

Replaced the case with a Cooler Master HAF XM - very roomy. Also replaced the air cooler with a Kraken x60. I need to ramp up the fans, but with their stock settings I am doing ~32 idle and ~42 when using VMs.

Oh, the Gigabyte BIOS was controlling voltage automatically (1.26V instead of 1.1V under load. WTH...) Setting that to NORMAL and forcing 1.10 now has load temps in the low 50s. This is sweet. I hope it doesn't go above 55, but the cooler's heatsink's thermal paste doubtlessly takes time to cure. 54C right now under load is pretty decent...

CPU was/still is doing 3.9GHz under load (all cores.)

It was voltage all along, but now I can feel confident in overclocking. I only tested load for a couple minutes, and I've read far worse situations only with much higher voltages. Phew!

It's scary how AUTO, on a system I hadn't overclocked at the time, made its own happy decisions... creepy.
    
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post #8 of 11
Thread Starter 
Addendum: I did see on the motherboard a small nick in one of the lines on the board by the cooler. I took a snapshot and it looks like only the paint was nicked; the bulk of the circuit line looks intact. The system has remained rock solid under load, but should I be worried at all about this?

Thx!
    
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post #9 of 11
Put liquid electrical tape over it if it bothers you.
post #10 of 11
Thread Starter 
Quote:
Originally Posted by HairyGamer View Post

Put liquid electrical tape over it if it bothers you.

I might. Just to prevent the chance of it worsening. Everything works, and I've read people who - once they scratch it - end up having to try to repair or just buy a new board. I'm lucky; protecting the damaged area from getting worse if I have to remove the assembly again might be a good idea. Thanks!
    
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Overclock.net › Forums › Cooling › Air Cooling › i7-4770k and Cooler Master Hyper 212+; 38C idle and 77C under load (3D render with Terragen) - is 70C too hot for sustained use?