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3930k safe temperature with prime95?

post #1 of 24
Thread Starter 
Okay so I've done some clocking. When running prime95 I peak at 74 C after an hour, my room is a little cooler then it will be in the summer.
Is this a safe temperature?
@ 4.2 MHz

Also my CPU Vcore goes down when running prime95 even tho I've set "Load line Calibration" to extreme.
Cpu Voltage: 1.33 when idle, 1.29-1.28 when prime95 is running

I will use my hex for gaming.

Edit: @ 3.8 MHz its acting bottleneck for my GTX 690 in Planetside 2
Using a Cooler Master Hyper 212 EVO


Edited by Bowab - 3/13/13 at 9:10am
post #2 of 24
I personally don't have much experience with your CPU, but a max of 74 Degrees Celcius is a bit high if you ask me.
I have a i5-760 @3.8GHz with a Hyper 212 evo (push pull) and my prime95 max is core 0 61 degrees and the other 3 cores at 54 Degrees.

What kind of thermal paste do you use, and do you have a good airflow in your case?
And is your heatsink put on right, and is your thermal paste put on properly?

EDIT: I asked that question about the thermal paste because your cores are a little bit different, almost 10 degrees different. That could be a sign of the thermal paste not put on correctly.
Edited by MichaelRB - 3/13/13 at 10:56am
post #3 of 24
F@H doesnt stress the cpu quite as much as prime, but you may want to try for lower volts. my 3930k did 4.2GHz at 1.27v. its folding 24/7 at 4.4 1.29v currently. temps are usually ~65c under my NH-D14.
For any length of stressing or folding i wouldnt feel comfortable at more than 70-75C. i think TJmax on SB is 90-95C? so its really up to your preference.
post #4 of 24
Thread Starter 
I don't know what paste. I believe the airflow is very good, it vents in the back, in the top and on the left side. I adjusted my volt to 1.32, I got 61 C¤ while playing a heavy cpu game. I don't know what I would get now on prime95. Probably Bsod but when the 3930k wasen't clocked it got Bsod a few times.

What I want to do now is checking the temp and not let it get above 65 while playing and not runing any benchmarks, if the system doesn't get Bsod and the temp sticks at 60-65 and i leave voltage at 1.32 do you think i am good to go? (Voltage is set to 1.20 in BIOS but CPUID tells me its at 1.32 max, should i worry?) I think the max voltage is 1.35-1.41.
post #5 of 24
You shouldnt need anywhere near 1.32v for 4.2GHz gaming. maybe if you were going to run F@H, but you shouldnt need it for gaming thumb.gif
post #6 of 24
Thread Starter 
Okay how about 1.32v and increase my clock to 4.4 hz or should i stay on 4.2 hz and decrease my voltage to 1.20v ?
post #7 of 24
mine is set to 1.296v with LLC set to auto. i would reccomend setting 1.27-1.3 and leaving LLC on AUTO thumb.gif You wont see any difference in games from 4.2 to 4.4ghz
post #8 of 24
Thread Starter 
Okay LLC would be Load Line Calibration? Thank you
post #9 of 24
You should be able to do 4.2 @ 1.2V most 3930k's are capable of it or a tiny bit above, max voltage for these chip's is 1.5V (the chips will degrade quickly above that point). I wouldn't allow the chip to run over 80C for any amount of time, but 70-80 is rather normal for this chip on air cooler's (with a few air cooler exceptions).
post #10 of 24
Keep you voltage at or below 1.4v for 24/7 on a 3930k. VCCSA and VTT need to be 1.2v or below 24/7. Prime95 load @74'C is more than fine. Everyday tasks will be in the 60s temp wise.

If you're doing a quick bench, up to 1.55v is fine as long as temps are in check during the bench. 80'C and lower would be my max for 1.55v benching sessions.
    
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CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
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