I have a Asrock 81 Pro BTC, with a Powercolor Red Devil 480 8gb, I have been trying all the roms there are, and from the stock of 23-24mh/s I only reach a maximum of 25.6-26.1mh/s. Boysie's 31+mhs rom doesn't really work, it starts mining, the the hash rate drops constantly until, and it goes to 10mhs (then I stop it). Boysie's 29mhs power saving rom reaches about 25mhs. I tried to copy my own values, from the 1750 to the 2000, and I max out at about 25mhs, I reach 26 with higher memory clock of about 2150. I bought 6 of these card, and I get the same result on two of them (I'm still trying them one at a time). They have Samsung memory, ASIC quality is 67,8%. The original ROM and Boysie's have the same ROM ID (vendor, device, sub, firmware signature). I don't understand what's wrong. I have tried another mobo, another PSU, the pcie power port is connected on the mobo. Please help!
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