Quote from: hdfxst on September 07, 2011, 02:48:25 AM

I have that same card and i run it at 1025/300 1.175 volts. -v -f1 give me the best hash rate(320-325),if i put -w128 the rate goes down

I discovered that I am losing around 2-4 Mhps by using the WORKSIZE=128. I stopped that. I am convinced that dropping the mem clock does increase the hash rate for some reason. I have tried it on two machines and am getting a better rate 2-3 mhps by dropping from 1000 Mhz to 500 Mhz. I don't know why. I am using MSI Afterburner to set clocks and apparently it won't let me go below 500, I may not want to for usability as others have said. I am using phoenix not poclbm so my options are a bit different from yours.