I'm running 3x XFX Radeon RX 480 GTR Black and 1x XFX Radeon RX 480 GTR on one Rig using the latest Crimson driver and claymore's 6.3.
The hash rate per card is approx. 25.5-26.5 with some slight overclocking on the memory.

So far the system runs more or less stable. What difference would a switch to crimson 15.12 make and is it even possible/recommended with a rx 480? I've read they improved the energy consumption significantly with the latest version.

Also, has anyone been able to achieve higher hash rates with the 480s using claymore than what I got? If so, how?