Looking for custom ROM for XFX Rx 480 8GB to hit 50H/s on ZCASH

What specs? Stock rx 480s?

Yeah stock eRx 480 reference cards. 2x of them

Interesting, the first time I tried to change the voltages in wattman I was unable to, once I changed the setting in polaris I was able to change them in wattman. This could be totally incorrect but I was under the impression that the change in polaris was what let me bump it up in wattman manually. However, you are correct if you just change it in polaris, it will show up as the default 975 in wattman.