In my opinion, modding the bios on AMD cards is a must. Just copy over the strip timings and it should be stable. In my experience, the instability comes with too much overclocking. Each card is different though so just play around with it.
I modded my 480s and 580s with polaris bios editor (just copy timings up to 2000) and overclock memory and undervolt with afterburner. Undervolting helps keep your cards cooler and keeps your wattage down. You kinda gotta experiment to see how far you can push it while maintaining stability.
I'd also recommend using a remote desktop manager and setting up alerts when your miner goes offline. If one of my gpus hang or there's some kind of issue, rebooting usually does the trick. Setup autologin and have the miner run on startup and then just reboot remotely with a simple click on your phone.
Cool, I will try to flash new BIOS again and not touch the clocking.
Thanks, this was very helpful. I re-flashed my BIOS on my 470 and didn't touch the clock, and its been relatively stable