i5/M395X: 11 hours under full load and...

MandiMac

macrumors 6502a
Original poster
Feb 25, 2012
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Hey all, a small new thread for you to dig:

I just used my i5/M395X machine for 11 hours straight with 100 % CPU and 100 % GPU usage.
I have some logs (GPU-Z and Afterburner) for you in my Dropbox, and it's really telling. The names of the files are the ones with CPU-GPU full.
(I used BOINC: World Community Grid//Clean Energy Project for the CPU, Poem@Home for the GPU.)

The CPU temperature reaches 100 degrees Celsius one time and the GPU never goes beyond 94 degrees Celsius.

So much for the "overheating troubles" many folks are shouting around. What are your findings?
 

mattoligy

macrumors 6502
May 15, 2010
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Cloud 9
Was this with default fan speed? Would be interesting to see the same test performed with the fan speeds cranked up a little!
 

MandiMac

macrumors 6502a
Original poster
Feb 25, 2012
654
304
This was with default fan speed, yes. No overclocking, no twiddling around: Just like it is.
 

MandiMac

macrumors 6502a
Original poster
Feb 25, 2012
654
304
I can't open the .txt files right now but I will do tomorrow. Quick question: how do you know the GPU/CPU weren't thermal throttling to maintain those temperatures? Does the log include the CPU & GPU clocks at each reading?
You have GPU-Z which logs the clock of the GPU and its memory clock speed.
Then we have Afterburner which records the temps, and together we should have an awesome picture of the reality :)
 
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AlifTheUnseen

macrumors member
May 17, 2014
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Thanks for this report - I haven't checked myself - if no throttling is observed, it's a step forward, I agree. 100°C and 94°C is still much too high, thus thermal stress will still be significantly higher than normal gear, but it's an improvement. Thanks again.
 
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mattoligy

macrumors 6502
May 15, 2010
396
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Cloud 9
I purchased the three year Apple care so any cpu/gpu damage will presumably be repaired. However I may use a utility to run the system fan slightly faster than stock to keep the temps down!
 
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