I recently upgraded my PC from Ryzen 3600 and 3060 Ti to 5700x3d and 4080 Super. It works absolutely great, but I’m worried about the temps. Both my CPU and GPU get to about 85c max, 70-75c avarage running Cyberpunk 2077. I’m a bit worried as people report about 70-75c, not 85…
For cooling-relevant stuff, I’ve got a Phanteks P400S TG, 3 fans(1x120 in the back, 1x120 and 1x140 in the front) of meh quality, an absolute unit of a CPU cooler - dual tower, two fans, copper base, copper pipes, but from a local & budget (but renowned) manufacturer, the honeywell thermal pad (I know there are fakes, mine looked good but could a fake cause 10-15c temps increase?). Ambient temp is not an issue, it’s at most 22c.
I’m running the GPU without any overclock or undervolt and I’ve applied MSI Kombo Strike 3 to the CPU.
I’ve got Fan Control running with auto settings, case fans to 100% at 85(either CPU or GPU), GPU to 100% at 85, CPU to 100% at 80.
If the temps are an issue, my best guess is I somehow messed up the thermal pad application, the case fans are not up to the task (especially with how the case restricts airflow from the front and the fans are only about ~1200RPM at 100%) or the GPU is pushing warm air up to the CPU. Any clues if that’s an issue and if so, what’s the cause?
Normal
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.
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.
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
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.
