I LOVE these XFX RX570 Black 4gbs that arrived today!!,all with elpida, 29.9mhs 1200/2000 and GPU-Z says 80watts,put limit to 100watts in bios and used modded timings from the custom memory thread from my xfx black 470s..havnt time to play at all,just set 1200/2000 and go! 7 hours now stable and racking up way more shares than my 470s doing 28.5mhs..let you know how far i can push them