I'll tell you, I had a mild panic attack when I upgraded my 3700x to a 5900x and the AIO cooler said it went up 14C at rest. Zen 3 is a beast with power consumption and heat loss.
As long as it stays under 95, you're technically safe.
this post was submitted on 19 Sep 2024
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85°C is still fine. You wouldn't want your system running at those temps all the time but if those are only spikes during intensive tasks, you're good.
If you want your PC to run a bit cooler, check your airflow, set manual fan curves, or try out a mild undervolt.
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Zen3 is OK to 95c TJmax, the cache would probably like to be cooler than 95 so you're fine at 85
5700x3d is not a high wattage part tho if you have a big tower cooler it should easily be under 70c l, check mounting pressure, thermal paste (do not use a pad)
I've got the Honeywell PTM7950 phase changing pad, which from reviews is performing as good as the best thermal pastes. I'd rather not remove it if it's not necessary as it's quite expensive but if I don't figure out another reason I'll try replacing it I guess.
Check your airflow. It could be that heat is building somewhere and being recycled into the intake.
Thermal Grizzly also makes a high performance pad (i.e. nothing wrong with using a properly-rated pad), so if you think yours is good, it's probably airflow related.
Now that I think of it, there's a simple check for the case fans. I'll try removing the front cover and see if it helps the temps in a meaningful way.
When I was doing benchmarks on my 2080 it would throttle down when it hit 85. I changed the GPU fan curves to always run at least at 50% and that seemed to keep ot from warming up. I used the evga precision or whatever GPU software and one of the graphs was thermal throttle so it would spike up. Not sure how the 4080 handles temps