Hi all,

I have a new Sapphire HD 7970 Dual X I got a few days ago for my Windows 7 system.

Despite a lot of reading here and testing various mining and card options, I can't get more than 540 Mh/s out of it.

cgiminer (best I've tested)
"intensity" : "7",
"vectors" : "1",
"worksize" : "256",
"kernel" : "diablo"

Temperature = 67-68 degrees
Fanspeed = ~2400 - 2500 rpm
GPU Clock = 1000 Mhz (It won't go above that without a catalyst fault which then resets it to 950)
Running Catalyst 13.3 Beta though find them no different to the 13.1

Desktop remains very usable..

Now I've resigned myself to not getting above 1000 clockspeed - but I'd still expected more than 540Mh/s. I get around 390 from even my old 6970!

What variables are left to play with..?