Really important on some PCs. The R9 290X was known to be trouble as it aged and the owner didn't re-do the heatsiink compound. From throttling to crashes. Google like "Tomshardware r9 290x heatsink compound."
When you switch GPUs I like to run DDU then install the latest drivers.
Also, be sure the case cover is off because not all parts have heat sensors. It does sound like heat or yet another HDD with bad Smart Values in 01 and/or 07.
Use Speccy for a first look.
I currently use the MSI B350 motherboard in my computer and had an issue with my PC. I was playing a game when it froze so I assumed that it had crashed. I tried to alt tab and got the icon menu to switch windows but then that froze too. I was able to use the windows on my second monitor but everything on the main one was frozen. I restarted my PC but after it booted past the BIOS loading screen it would only display a black screen. The GPU LED on the motherboard was lit up so I assumed that my graphics card had died. At the time I was using a R9 290X. I took it out of my PC and made sure it was properly connected but the same error occurred. I assumed that the card had died.
I then purchased a brand new MSI GTX 1080, but when I put that in my PC the exact same issue occurred. So I tried a few things after that:
I put my old card back in and tried clearing the CMOS but the same issue occurred.
I then put in the card with the same result.
I updated the BIOS to the newest version but came across the same black screen. (Although now the GPU LED is off)
I have no idea how to fix this or how to proceed from here. Any help would be greatly appreciated!
Thanks in advance!