PC freezes randomly without BSoD

Hello,

My PC started randomly freezing without Blue Screen.

I believe it's started in August: some day when I started a game (Shadow of the Tomb Raider) it didn't start. I was wondering what happened (I went to the another room thinking that game will load in that time, so I couldn't see what's on screen sadly) and there was an error in Event Viewer mentioning hardware error. After I tried starting a game again, it was completely fine, I was able to play so I thought it's nothing.

Next day when I tried play an another game, after ~15 minutes of playing, my PC completely froze with buzzing sound, like BSoD was coming, but it didn't. After hard reset (it was the only thing I could do) I was able to play the game without any errors. It repeats in another day - playing for ~15 minutes, freeze, hard reset, playing without errors. I thought it's faulty game, because when I tried playing same game but with lower settings, it was fine. However, it happened again when playing game #3, and again - same scenario.

Then was suspecting GPU or PSU, so I downloaded FurMark and tested my GPU for 20 minutes. Max temp was 76*C if I recall correctly and it finished the test without any errors or artifacts. Then I downloaded HWiNFO to check voltages but they were normal. I also changed DWORD TdrDelay in registry to 10 seconds.

Since then I wasn't playing and there weren't any freezes or something. 3 weeks ago I tried playing a game again and I was happy, because for 3 days of playing there weren't any freezes. I thought PC repairs itself somehow, however 2 weeks ago I left my PC with game turned on for a while. After I returned, on screen was something like that: https://discussions.apple.com/conten...ent/1006137040. After hard reset I was able to play a game normally.

I found strange that PC was completely usable after restart so I tried turning off fast startup. I thought it's a solution, because I was able to play without freezes longer than 15 minutes (in fact I was playing 5 hours), but some time after I finished playing, when browsing a web casually my screen went black and after moment picture on screen returned. I looked at Event Viewer and there is "display driver nvlddmkm stopped responding and has successfully recovered". I also increased a virtual RAM to 1.5x16GB min and 4x16GB max besides of turning off fast startup. So I was suspecting GPU again. I clean installed latest GPU drivers (deleted old one first with DDU).

Last Tuesday my PC started freezing not when playing games, it froze during a call via Discord (in fact I just finished a call and disconnecting a Bluetooth headset from PC). Fast startup was still disabled and virtual RAM was increased then, so I figured out that's not a solution. After looking in Event Viewer I noticed that Runtime Broker crashed in the same time, when I got a freeze. Today it happened again, that time I was just browsing a internet.

Right now I'm suspecting GPU, PSU, RAM and motherboard. Why RAM? In February I was getting a lot of BSoDs and program crashes (similar to the Runtime Broker crash from Tuesday), which stopped after I replaced the RAM. Why motherboard? Because after getting a new RAM kit I immediately tested it with memtest and there weren't any errors. For now I updated a BIOS to latest version, turned off a XMP profile and tested my hard drives (no errors). Right now I'm memtesting RAM sticks. I'm going to try how PC will work when using integrated graphic card only. Any ideas what I can do more to find a culprit? In attachment I'm adding logs from HWiNFO finished by PC freeze.

My specs (Speccy link: http://speccy.piriform.com/results/7...7WzaX1Uno7UJTt )
CPU: Intel Core i5-8600K - no overclock
Mobo: Gigabyte Z370 AORUS Gaming K3, BIOS: F15
RAM: Corsair Vengeance LPX, DDR4, 16 GB (2x8GB), 3000MHz, CL15; XMP on to achieve 3000MHz
PSU: SeaSonic Focus Plus Gold 550W
GPU: Gigabyte GeForce GTX 1060 Windforce OC 6GB GDDR5
Windows 10 x64, 1909
Everything is 1 year old except RAM, which was RMAd in February.

At the next freeze,try resetting the graphics driver-----win+cntrl+shift+b.This will cause the screen to flicker,no cause for concern.
When you changed the TDR in the registry,don't forget that in a 64 bit system.it is QWORD.In a 32 bit system it is DWORD and iin both cases is CASE sensitive.
The default time is 2 seconds and the time shown in the registry is in milliseconds,so make sure the zeros are correct.
The 'nvlddmkm.sys' is a proverbial pain in the whatever.The nvidea site has numerous complaints and I suggest a visit might be of some help,or not.
You could also check Reliability History for any relevant entries and also in the search box,type in---dxdiag--and see if it has any info.

Hello,

Thanks for your reply and sorry for delay.

There is a log you requested.

I was using my integrated video card for a while and there aren't any freezes. I will try hints which @joeandmarg0 posted now and after that I will try replace a GPU with another card which I borrowed to check that will be any freezes.

Hello,

About the freezing, I have experinced it too.
One time i was putting my computer on a sofa when it froze. random glitched pixels apperead on the screen. I don't know the cause to this.

This other type of freeze is a weird sound emitted by the system.
this i think it has to do with overheating.

For now. i don't get as much freezes as i did before.