Crymn

I've figured it out! It seems SpeedShift only gets enalbled when using the Balanced or Power Saver power plan. I was using the High performance power plan and set the min CPU usage to 5%. Turns out that the High performance power plan doesn't enable SST, so I just went back to Balanced and now all is fine. Thanks for all the help.

SpeedStep is on and the Non Turbo Ratio variable is set to 0. SpeedShift seems to be disabled tho, I've enabled it in the BIOS but it doesn't have any effects untill I turn it on using ThrottleStop. After enabling it in ThrottleStop my clock speed varies again so that dope. But is there any way to enable this by default or do I have to launch ThrottleStop at startup from now on. Btw, in the meantime I've also tried booting from another systems boot drive (that has a clean windows install), on that drive SpeedShift seems to work just fine without having to enable it manually. Could it be a problem with my with the current windows insiders preview that I'm running on, although I haven't seen any reports of this issue on the insiders forum or known issues list, plus the issue was also happening in the previous build. So I guess I kinda answered myself there... Anyway.. I hope these screenshots might help a bit.

Update: After messing around a bit more, trying different windows versions and resetting the BIOS multiple times, the problem fixed itself. Thanks for all your help.

CPU-Z gives the same results.

HW Monitor and Task Manager

Just checked, they're on.

So my CPU core clock stays at max speed, even when idle. I had it overclocked to 5 GHz, but for some troubleshooting I had to reset my BIOS, applied OC again and my clock speed stayed at max. I already checked my power plan, its on balanced with a min CPU usage of 5%, cleared my BIOS again (running stock now), enabled EIST, disabled Hyper-V. I hoped some of you might have clue about what to try. Specs: GPU - Asus strix GTX 1080 CPU - I7 7700K Mobo - Asus strix Z270F RAM - 16GB DDR4 2666 MHz

I tried it, and as expected it didn't work. I'm gonna wait this one out and see if a new windows update fixes it, otherwise clean install it is. As you said also really hoping it isn't a hardware issue. Thanks for your help.

Yes I did, didn't help.

Clearing BIOS didn't help

Tried an older GPU driver, shutting down while holding shift and shutting down using cmd. Nothing worked, but thanks tho

It is a setting, and I have it turned off. The main problem is, is that I also can't turn my PC back on again without flipping the switch on my PSU. I also have LED's on my mobo which turn of when the cable is plugged into my mobo and turn the system off, but when using the GPU they stay on. So after shutdown it just looks like my pc is on without doing anything.

I edited the post, specs are there now.

So my PC won't shut down when my monitor cable is plugged in to my GPU. If I plug the cable into my mobo it shuts down just fine. But as soon as it's plugged into my GPU (even if I switch from mobo to GPU after boot) my PC will turn off, but all my LED's will stay on, no fans spinning, keyboard not lit, pressing the power button does nothing, no video signal... nothing. The only thing I can do I flip the switch on my PSU or hold the power button, then everything turns off. I'm in the windows insider program so I thought it might have been a windows thing, but I rolled back to the previous version and nothing changed. I removed my GPU drivers with DDU, nothing. Installed them again, also nothing. Removed afterburner, GPU Tweak II, RivaTuner, Geforce experience, nothing. I also don't remember something special (like driver or windows update) happening when this issue showed up. I hoped you guys might have clue about what it could be. Specs: GPU - Asus strix GTX 1080 CPU - I7 7700K OC'd to 5 GHz Mobo - Asus strix Z270F RAM - 16GB DDR4 2666 MHz

Update: found a bent pin Sigh.. It works now.