hi,
Do you mind if you can share your config for the AMD R9 270 ? My R9 270 only gives me 1.1~1.2MH/s. I am using gpuminer_v2s on Win7 64bit.
win8 64, 8megs
Sapphire r9 270x Dual X + MSI r9 270 Gaming (undervolted 1.10v from scrypt mining days, not necessary with jackpot algo)
usb risers
43-47C
stable @ 1.39MH/s - WU 1.29MH/s
gpuminer_v2s
-I 19 -g 2 -s 1 --gpu-engine 1100 --gpu-memclock 1500 --gpu-powertune 20 --gpu-fan 0-50 --temp-target 60 --temp-overheat 75 --temp-cutoff 90