New PC setup – overheating CPU is a concern
New PC setup – overheating CPU is a concern
Hey everyone, I just completed my first build using a CPU coolant cooler instead of a heatsink. Everything seems to be functioning well and it even started up on its first try. I followed the usual steps—updating drivers, software, checking sensors, temperatures, and running benchmarks. But I noticed something odd with my CPU: the temperature sensor on the motherboard and CPU are showing high readings. Looking at the parts list (https://pcpartpicker.com/list/zMLHgb), the CPU package temperature and the motherboard CPU core temp are consistently around 75-90 degrees. While all cores appear normal, the P-core 4 and 5 are spiking up to 80+ and then dropping quickly. Should I be worried about this? Apart from that, the machine is running perfectly. Cheers!
The list appears empty. Did you save it? The link you shared doesn’t correspond to the list. That said, 77C tends to run hot during idle, less so under heavy load. Things to verify — case airflow should include two or three front intake fans, one or two top exhaust fans, and a rear exhaust fan. AIOs require air for cooling, and many solid-front cases have blocked side-draft intakes by AIO radiators. Applying thermal paste could also help, along with ensuring proper cooler installation and removing any plastic covers from the mount base.
I made the changes to match the actual list you believe better represents the real temperature. From the screenshots on hwmonitor, you can notice spikes in p-core 4 and 5 during certain moments. Only those two cores will briefly reach 75-80 degrees before dropping back down to 35-40. I ran some stress tests with prime95; when the CPU hits full load, all cores heat up, causing the h150i cooling system to warm up and the fans to activate. But without a stress test, the coolant stays around 31°C, even though the monitoring sensors indicate high temperatures in the package and the same for p-core 4 and 5.
Hey there! It seems a bit odd here. If you've verified the paste application and didn't notice any gaps, it might be broken sensors in those cores. I'd reach out to Intel regarding a possible return or replacement.
The top choice is to use an IR temperature gun for confirmation. Core temperature and package temperature differ.
Hey! OddOod, thanks for the welcome. I followed the usual fixes with paste, making sure the cooler was screwed up. Maybe I should consider a return. It’s unusual to have this problem, especially since I’ve built a lot recently and haven’t seen it before. Appreciate the help! That sounds like a good point—could be a faulty sensor, given how the readings jump every few seconds. Also, the H150i doesn’t boost CPU performance until after a load. Thanks for the tips! I got that too after reading it, and it matches what you said. Corsair Ice is also reporting such high temperatures.
Many Ryzens perform this. Particularly the more recent ones. Your 5900X often climbs from 35 to 45, and can hit 55 even when idling.