Ryzen 3 1200 sometimes doesn't post

[tautvis99]

Hello, I've just woken up and turned on my PC. Unfortunately, the system boot up (everything is running: CPU, GPU, PSU etc.) but it doesn't post. It shows that there is no signal and this happens not for the first time. I suppose it's because of the OC profile or something with BIOS or RAM because I've recently been trying to make my OC profile stable since games like GTA V make my PC screen go black out of nowhere while playing. But what could be the real problem behind all of this?

PC specs:
Mobo: Asrock AB350M PRO4
CPU: Ryzen 3 1200
Memory: 8GB DDR4 2666Mhz
GPU: GTX 1060 6GB
VBIOS: 86.6.45.40.7
Driver: 388.71
OS: Windows 10 Pro x64 16299.125

 

[simon12]

Does it run OK without anything overclocked and what PSU do you have?

 

[tautvis99]

Does it run OK without anything overclocked and what PSU do you have?

Yes it runs fine without OC and "fast startup" mode
My PSU is Seasonic M12II-520 EVO

 

[simon12]

Something about the overclock is unstable. If your looking to get the PC working again just reset the bios using the jumper on the motherboard, if you are trying to find whats unstable about the overclock please post what settings you have tried.

 

[tautvis99]

Something about the overclock is unstable. If your looking to get the PC working again just reset the bios using the jumper on the motherboard, if you are trying to find whats unstable about the overclock please post what settings you have tried.

I've tried many settings. I've raised the voltage up to 1.35V at 3.8 Ghz (GTA V gave me a black screen after playing for some time), then I've tried with the same clock rate but raised the voltage a little bit up to about 1.36V and still the game gave me a black screen and PC sometimes didn't post. Now I've raised the voltage up to 1.4V. I haven't tried playing GTA V on this preset yet but my PC still haven't post sometimes when I wake up in the morning with this OC preset.
What concerns RAM, I haven't touched any voltages and left XMP profile at 2666Mhz (same clockrate of RAM as showed on packaging).

 

[simon12]

Try setting the voltage to 1.3 and raise the clock 100MHz at a time stress testing with prime 95 for 10 mins every time and see how it goes.

 

[tautvis99]

Try setting the voltage to 1.3 and raise the clock 100MHz at a time stress testing with prime 95 for 10 mins every time and see how it goes.

Thank you for your answers, will try when I have enough time.