I have an AMD zcash miner, win-only, stratum-only.
It does about 22H/s on a 390X now. I might release it but I'm afraid it needs more speed.
I think its close to what the jtoomin bros got with their 290. They got 25H/s if I recall correctly.
The ZOGMINER gets like 13H/s with the 470/480.