I add ready sample settings for hd7870x/7950/7970/280x/290/290x in that folder.
Settings for hd7950 = R9 270x?
WU=0.078/m is this normal?
Speed card 1,388M each R9 270x Little? A lot?
GPU 1200 Mem 1400
for R9 280x
GPU 1200 Mem 1500
Speed card 2.3M WU=0.116/m
Little? A lot?
I don't have 270x so i can't tell you, but i think you can lower thread-concurrency to 11263 or 16384 or 20480. I think someone who have 270x can help more.
for 280x Speed card 2.3M is very good