Echsenmensch

I already disabled Turbo Boost and SpeedShift, it occured aswell. I did no overclock, as 5 GHz are still more than enough. I do know that the cooling of the cpu is extremely bad, and I'm planning getting eigher a AIO or th Noctua NH -15. I diagnosed the memory with the windows diagnosis tool, and it showed me that everything was ok. As mentioned I tried it with a new PSU, but it wouldn't start (I think the high current protection kicked in which led me to think of a failing part in the mb as the psu was alright). I'll probably try another one. As I have poor airflow in general (CPU cooler blocks it because its crosswise to the flow) and there are no readings for the vrm's so no software is able to throttle because the thermal protection is all hardware, it will probably just shutdown instead of throttling the cpu. Can you suggest how I can get the VRM's hot on purpose? Would you suggest enhancing core voltage? This is my first PC with decent power, so I'm not touching anything yet

I get random systemwide freezes (if sound played there is a buzzing sound), resulting in sometime a starting bluescreen which is then cut off, a bluescreen (dumpfile is referencing a random process), or a freeze with buzzing noise (if sound was playing) which sometimes needs manual cutoff or just restarts itself. As I've read that the VRM cooling on this mothermoboard is not exceptionally good, I came up with the conclusion that the motherboard does a thermal shutdown because of overheated mosfets (there is no reading of the mosfets in HWinfo, so I guess the VRM sensor is only used to determine overheating and not when to thermal throttle; this can be done using hardware only). Things I did: reinstalled windows 2x reinstalled most drivers checked event viewer checked monitoring while freeze using second monitor tried with a different PSU, didn't start at all analysed dmp files (just to see if there's a particulary bad process which is responisble; there isn't) ran kombustor CPU burner: no issues execpt high cpu temps (+- 100°C) analysed RAM, no issues run kombustor stresstest, no graphic issues diagnosis of memory - FAILED with memtest 86, passed with windows My Setup is: i9 9900K AsRock Z390M Pro4 4x4 Corsair 2666 GTX 1080 8gb + Quadro K4200 4gb (working properly, not causing problems) BeQuiet E9 CM 480W (shouldn't be the issue eigher as it happens anytime, not only when power is needed) 2x 180mm fans, 220m3/h intake Shadow Rock bequiet! +1 intake blowing air to VRM/CPU disabling turbo boost my cooling isn't finished yet. could anyone help me determine the problem? I am not defenitely sure yet, and wanted to get some advice before buying a new motherboard. thank you in advance! ++++++++++++++++++++++++++++++++++++++++++++++++++++++ Follow up: It turnd out it was a bad memory stick; I firstly trusted the microsoft memory diagnosis tool which showed no errors, while the memtest 86 showed me multiple errors. I am now running on 8 GB until my new units arrive (2x4GB), without any issues so far. Thanks for all the answers providing advice and knowledge for me!

No I have the z390 Pro4, but I'll be testing the VRMs now, as I do not trust them any longer... I have the exact same symptoms, so it's very likely to be a problem.

Same Problem in 2020 ;)... Thank God I finally found something on why my PC keeps crashing!