Three cards in this rig RX580 , RX480 and a R9 270x. The RX580 & RX480 have modded BIOS.
Funny thing though, tried the new beta driver in one of my 6 card rigs, a mix of RX480's & RX580's with moded BIOS, after beta driver installation all but one card was seen by Catalyst/Claymore - running the 'atikmdag-patcher' made the 6th card visible, but there was absolutely no change in hashrate ?
Edit: Hashrate before beta drivers installed 156Mh/s, hashrate after beta drivers installed 156Mh/s.