The GPU's have not been bios modded, stock.
Temps never reached more then 75
I took the rig apart, new PCIE risers and cables, same result. Placed each RX 580 into the one PCIe x16 slots on board and same result. It's not the hardware connecting the GPU to the MOBO.
Can clarify in more detail the, "software issue is a bad timing strap pasted into the BIOS that is causing the errors".
Thank you both!
Since you have not BIOS modded these then your problem would probably not be about the "bad timing strap" issue i mentioned. Can you clarify what you mean when you say you placed each rx 580 into one PCIE slot and got the same result? Do you mean you mined with 1 GPU only and yet it still crashed/stopped mining after 1-2 mins?
Also trying lowering you overclock settings. Try 1100 core/1900 memclock first.