Btw I'm able to get ~200 MHash/s with my 5770 and about 170 without overclock using Guiminer. Just use extra flags: -v -w256
I get those same kind of numbers using -v -w128. I thought it was a model wide setting. All I've been seeing is for all 5xxx, and 6xxx to use -w128 for best performance. Maybe it's dependent on other system variables!
Tryed your settings and seems like im getting 3-4 Mhash/s more. Thank you
dont worry about minor hash differences, system variables and other factors would play a part. differences of upto 5-10 arnt really breakers for your bitcoin mining operation. Whereas if you can improve your mining hash by at least 20 then thats a notable difference.
The best things are to overclock your gpu and underclock ur mem. Use msi afterburner, amd clock tool to do this. remember to keep below 90c, I usually aim at 79-80c.