motherboard weird motherboard behavior

[majkinson]

Hi,

I just upgraded my PC - bought a new MoBo (AsRock B460m pro4), CPU (i5 10400f), some M.2 SSD and two new DDR4 ram sticks. I am still using my old Sapphire Nitro R9 380, because GPU prices... I am having some strange issues with it and I think it's probably the MoBo. When it starts booting i see random weird colors on my screen with artefacts all over it (see jpegs below). After that, everything is fine and windows seems to run without any issues. But when I tried calling over discord (or anything else) i realized my old microphone was suddenly extremely quiet, even though it was boosted to +30db. I tried reinstalling Realtek Audio Drivers and after restart, windows failed to boot. I reinstalled it again, windows runs now but the sound is still very quiet, with both my old microphone and headphone headset. So I am thinking there is something wrong with the onboard sound chip? And considering what happens during boot, maybe the whole motherboard is somehow faulty? Anyone ever experienced anything like this? Any idea what to do? Should I send the MoBo back?

Thanks for your time
 

[mr fobs]

I would start with a BIOS update. You should be able to find that on your manufacturer's Website.

 

EDIT: Make sure to not power down your machine during the BIOS update. It can brick the MoBo

[majkinson]

BIOS update didnt help. Same issues. 

[majkinson]

So I tried my brothers GPU GIGABITE 1070 and the weird boot screen disappeared. With 1070 the PC start is much faster - 11 sec vs. 26 sec. When i put the R9 380 back, have same issues again.

Could be the MoBo faulty? Or it just doesn't work properly with the GPU?

 

GPU doesn't affect the sound, both microphones are still too silent. When I open Sound settings, on Playback tab can see addition to "speakers" 5 more "HDMI devices" (see jpeg).

Any suggestions?