BetteBalterZen

It's actually not a "hot" chip. The high idle temps is just by design. AMDs latest CPUs idles with high VCore to have the cores ready for high clockspeed spikes for when you fx launch a program or a game. Then under load, with a steady load, overall VCore lowers and that's why temps seem fine under load. With AMDs 7000 series CPUs, they run "hot" under load too but that is also by design. They will boost until hitting around 95c, to squeeze every bit of performance out. You and your girlfriends PCs may have a different temps because of different motherboards supplying different amount of voltage, could also be your girlfriends CPU is a golden one, a good sample. But anyhow, your chip is running just like it should. You can relax the fans and let it idle around 50/60c, it's just fine.

Glad to hear it helped

Maybe it's a monitor issue? Try remove power cable from monitor and after hold down its power button for 5/10 seconds, then plug in cable again and see if turns on

Can't view .heic photos.

Is the pump running with low RPM?

IMO, Nvidia all the way because of DLSS. DLSS and frame gen is awesome.

Futher adding to these; Did you cross tighten the screws to get even pressure?

Hmm okay. Sounds kinda weird how two very different PCs experience the same stutter, with a fully updated and clean Windows... Did you use the same monitor with both PCs? Do you perhabs have access to another monitor you could try? Again, I'm assuming you have set your monitor to its highest refreshrate and so on.

Assuming you install all drivers and update firmwares and BIOS, then what program do you install and have running? I once had HWiNFO running in the background with Rivaturner to show HWiNFO stats in video games. Having HWiNFO running causes a lot of stutters, especially in video games with high framerates.

I'm reading that the 4080 and 4090 FE cards have zero RPM mode, so the 4080S must have it too. If you have the 4080S card and you never see the 0RPM mode in action, it may be caused by having a high refreshrate monitor. When I'm using my 120Hz monitors, my GPU idles down and goes into 0RPM mode but when using my 240Hz it does not.

I've experienced the exact same, when using my 5120x1440@240Hz (primary display) and 3840x2160@165Hz(secondary display) monitors. The cause was Multi-Plane Overlay (MPO), a power saving feature that is enabled by default on a Windows level. If you wanna give it a try, you can disable it via a regedit: Go to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm", create DWORD called "OverlayTestMode" and give it value "00000005" - restart your system. (Windows update can revert this DWORD change I've read but never seen Update revert it on my system).

Use an overkill PSU, just like I do, with 0RPM fan mode until a certain degree or load is hit. I have never heard my HX1200i spin up during gaming, always dead silent