Started mining Graft with my 3 RX580 8gig cards, get decent hashrate I think...

When I mined ETH or ETH+XVG the cards definitely seemed to work harder, they ran warmer for one, but with Graft on graft-pool.net I get about 810 H/s per card and GPU's run at 53 degrees celsius.

Is this hash rate fine? Should I overclock more?

I did overclock them a bit more yesterday by go OPEN GL error after a few minutes so I dialed it a bit back.