[SOLVED] Screen blacks out

Jan 14, 2019
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Wondering if I need to buy a new GPU. Just built a new PC - worked great for the first week. Now when I plug in an HDMI cable to my GPU, my screen goes black randomly every few seconds, making it unusable, and forcing me to restart. Right now I'm using my intel GPU. I have updated all drivers, made sure it is seated correctly, replugged all of my power cables. Do I have to get a different GPU? It's basically brand new which is a shame. (can't return it ;( rip) Thanks everyone.

GPU: Sapphire Rx 580 Nitro+ 8gb
CPU: Intel i7-9700k
PSU: Corsair RM850x