I have a Sapphire Radeon NITRO R9 380 4GB GPU. Since I installed it back in 2016 I have freezing problems with it. I have done all of the diagnostics and I can find no problems. But if I play any videos, Youtube, or if I am doing heavy duty tasks it will freeze. It is not a BSOD, no blank screen it just freezes. The sound and everything just stops and I have to reboot. On the various gaming forums they have been talking about this issue since 2015. Nobody has figured out a reliable solution. Today I disabled an energy saving subroutine which was reported to be a possible cause, no joy. I have always run Nividia GPU's in past years. Except for this freezing issue I am very pleased with this R9 380. Fortunately the price of GPU's are dropping. The gaming forums are reporting good things about the RX580 Radeon GPU's. I was working on music files with jRiver yesterday and I got real frustrated because I had to reboot from a lockup several times.