Why does my PC rev when idle

so this is something I wanted to talk about for a while and ask people to get a more accurate response.

my system is as follows

i9-13900KF (bios updated)
4070 rtx
64gb ram @ 6000mhz
1 tb m.2 SSD
win 11
dx 12

motherboard is MSI and I keep turbo boost and turbo boost 2.0 off because the amount of rev’ing that my PC does even when idle was bothering me. I understand when doing something CPU intensive like running WoW but why does it randomly rev when idle. Also is it safe? I have an AIO to cool the CPU but when monitoring my temps I see some cores hit 100°C then drop immeditately…is this normal?

I guess what I’m trying to ask is, is it okay/safe to keep Turbo boost+Turbo boost2.0 on 24/7. Thank you

Yes. CPUs now days a have a thermal limit they kind of “chase” along with a boost frequency. Its called a Boost Algorithm. Its differant on AMD and Intel but they both do it. If this is upgrade from say a 9900k or earlier it explains why it makes you nervous. Its just how newer CPUs work. The days of just OCing a CPU to a flat frequency it will run at 24/7 are gone. Its all about Undervolting with Boost Algorithms now.

If temps bother you than you could slap a 360 AIO on it if you having already. The 13900k practically requires one. You can install Core Temp or HWinfo to minitor your CPU Temp. Dont focus on your CPU Boost Temps. Focus on your “Average Temp”

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thank you this helps a lot…

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depending on situation hitting 100c is odd. Did you build this or was it a prebuilt?

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100C there is something severely wrong. My 9800X3D never goes above 65, even at full load, and I’m using an air cooler.

It’s not just a software problem, because even at full tilt a CPU should never run that hot if you have adequate cooling. Perhaps the AIO isn’t installed correctly, perhaps it’s not large enough, or perhaps the thermal paste isn’t installed correctly. Or maybe the CPU is damaged from Intel’s over-volt issue on the 13 and 14 series.

If the app is not on a 360 AIO or equivalent that temperature is 100% possible

Its a 13900k. Your cpu can practically be air-cooled

If the OP is probably not on a 360 AIO or equivalent so that temperature is 100% possible their CPU

Its a 13900k it has far more cores and runs much hotter than your cpu. Your cpu can practically be air-cooled with a baseline air cooler

I had a 12900k on a 280mm AIO cooler, and it also never went above 65C even at full tilt. Just upgraded to the AMD this past January.

I’m wondering if the OP’s setup has an airflow or setup problem of some sort. It helps that I have a giant case.

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