i am currently using an RX480 8gb from sapphire and getting a lot of no signal while gaming. Most of the time there are no loss in performance or drops in fps but the pc suddenly lose the video signal (and grant me a no signal) and hard lock himself.
Some games don't seem to encounter the issue while other will crash quite fast (Fallout 4 and Dark Soul 3 for example) while Doom in vulkan mode will play perfectly fine at 1080p in ultra mode (note that i already lowered my settings for games crashing easily)
All drivers are up to date
Amd Phenom II X4 955be 3.2ghz
RX 480 8gb sapphire
8gb ddr3 pc 10700
win 10 64 bits (on sandisk ssd + hdd for storage)
msi 870 c45 for the mobo.
psu cx 600 corsair 80 bronze
the card is still under warranty