Sorry for late reply, internet has been out. I tested each card individually and they all worked when directly connected to the x16 riser. I found a solution while working.
So to anyone who looks at this thread looking for answers, I believe I have (most of) one. The risers m1n1ngP4d4w4n suggested worked. Solved the issue of the overall unstable system and now I have four working graphics cards. I then, though, had issues with the NiceHash miner itself. It seems that it is not an issue with my hardware, but an issue with NiceHash's software as stated (not exactly but mostly)
here. Since NiceHash doesn't have a working miner, I am now using
Claymore's ZCash AMD GPU Miner and
Claymore's Dual Ethereum+Decred AMD+NVIDIA GPU Miner (switching between them manually as profitability changes according to
WhatToMine).
Seems problem solved for now. Just waiting for NiceHash. Thank you m1n1ngP4d4w4n
.
Hey, good you got it working
don't thanks me, thx the good people on this forum that post good stuff like this