is it low ?
I'm getting 2.3 mh/s on 7870, so it's kinda low I think.
Try setting -w 256 -g 1 -I 20
I'm getting 2.25 mh/s on 7950
-i 20
core 1050
that's the cgminer.conf:
"intensity" : "20,20,20,20,20,20",
"vectors" : "1,1,1,1,1,1",
"worksize" : "256,256,256,256,256,256",
"kernel" : "scrypt,scrypt,scrypt,scrypt,scrypt,scrypt",
"lookup-gap" : "0,0,0,0,0,0",
"thread-concurrency" : "24000,24000,24000,24000,24000,24000",
"shaders" : "1792,1792,1792,1792,1792,1792",
"gpu-engine" : "1020,1020,1020,1020,1020,1020",
"gpu-fan" : "0-80,0-80,0-80,0-80,0-80,0-80",
"gpu-memclock" : "1400,1500,1500,1500,1500,1500",