Hey guys,
me again!

So. I'm still running 6x RX480 4gb saph nitro+. Blockchain drivers, Memshift Anorak Bios, OC with AB.

So out of two rigs with exactly the same setup I've recently been mining on nicehash with around 28MH per card. On Nanopool dual mining ETH/SC I've been getting around 25MH. After the whole nicehash hack I've had to go back to nanopool until they get the systems back up and running.

Thats all fine and one rig is running golden. My other rig however has now decided that it will not mine at anything higher than 19MH with the same settings. I've tried reinstalling the drivers, reupdating the Bios, playing with OC, went back to V10 claymore, etc but no luck the cards are just refusing to run at over 19MH. Does anyone have any idea what could be causing this? I think I'm going to switch the hard drives around tonight to see if that does anything but short of that I'm stumped. Guess it would mean a fresh windows install if it does solve it.

PS. when I tried powersave bios on half the cards it did drop it even further to 16MH. previously on powersave I was getting around 22.

Looking forward to hearing what ideas you guys might have.