Hello! Thanks for the help in advance, my problem goes as follows.
During the last week, I've had some random PC freezes, no BSOD or black screen, nothing, just plain freeze, and also I haven't done any overclocking on the system. This freezes had happend in a lot of situations, browsing the web, playing a game, just on the windows log screen and even on the BIOS. I started trying to diagnose the problem, removing all the expansion cards and drives, applying new thermal paste to the CPU, taking out all RAM DIMMs and adding one at a time, so I think it is related to the motherboard but I cannot completly pin it to that component because sometimes the PC just workes fine for a long time (sometimes even days), even on games so there is no heating problem (as far as I can tell). So the next step was to try to diagnose the motherboard but as my research told me, there is no 'real' way to test the motherboard from software. I also checked the drives I have installed, all checks were made with the manufacturer software and none showed any problem. So, would this be a motherboard related problem? Or, could it be a CPU problem? As far as I know, if it was a PSU problem it could randomly turn of, but in this case it just freezes...
EDIT: I also tested the RAM, and it showed no errors. Also, when the PC boots, it sometimes makes the beep and others it doesn't but it runs equally 'normal'.
My specs:
CPU: AMD FX-8350
GPU: AMD Radeon R9 285
Motherboard: Asus Sabertooth 990FX R2.0
PSU: Corsair 750 Watts
RAM: 16 GB Kingston HyperX Fury
OS: Windows 10 1909
BIOS: latest version
Thanks!