Troubleshooting Help:
** Parts List ** i5 -4770k
Intel Motherboard (can find exact model if needed) 16GB ddr3 RAM (4x4gb)
xfx r9 390
EVGA 750w Modular PSU
Fractal Design Define R5 case
Describe your problem. List any error messages and symptoms. Be descriptive. Occasionally (read, every ~20-40 minutes, though occasionally longer) my system will blackscreen, although sound will continue to play. This will continue (although sometimes the sound will go away with the system power remaining on, i.e. lights on, fans spin, etc.) indefinitely until I manually shutdown by holding down the power button, and restart. The issue has been most frequent when streaming video from an online service, or when playing (or loading into) League of Legends. I have been able to run Furmark for 2+ hours with no crashes however, which makes me thing it might not be a hardware issue. But I also find it very unlikely it's a software issue; more details below. The whole system had been running fine for 6+ months (I recently swapped out the motherboard, as my old motherboard died), so I don't think it's an installation/build error either. The black screens have been going on for about two weeks. I believe all video input to the monitors is lost, not just that windows is displaying a black screen visually, since the monitors turn off as though I had turned off my computer when this happens.
List anything you've done in attempt to diagnose or fix the problem.
After I noticed the black screen the first couple of times, I tried uninstalling and reinstalling video drivers, issues persisted.
I downloaded HWMonitor, and checked temps over several hours, with a max of 85C, maybe a bit high, but nothing that should be causing black screen. There were crashes during this period.
Next, I uninstalled windows, formatted my ssd, and reinstalled, in an attempt to eliminate any driver issues. After roughly 20 minutes of watching The Boys on Amazon Prime post reinstall, I got a black screen again, with the sound continuing to play in the background.
This is when I downloaded and ran Furmark for ~2 hours in an attempt to reproduce the crash. It ran fine for 3+ hours, with no crash, with a maximum temp reached of 86F on the GPU.
I've checked event viewer after every crash, and found nothing in errors or critical, other than the kernel power error, which I believe comes from me manually turning off the machine by holding the power button.
Help?
At this point, I really have no idea what's left to try. I'm open to buying a new GPU, but I'd rather not spend the money if this isn't a GPU issue. I'm trying to get a hold of another machine to test out the GPU in, but for now assume that's not a possibility. If anyone can provide any info, or if this isn't the right subreddit, please let me know!
Thanks!