I'm running dual 5830s on my test machine clocked at 875,900. Also using the latest ubuntu 11.04 x64, sdk 2.4 and catalyst 11.6.
using Deepbit pool, hashkill is delivering about 433Mhash/sec but phoenix 1.5/phatk is delivering about 528Mhash/sec. Should I be using an earlier driver? I tried playing with -D, -G1, -G2, -G3, -G4. Is there anything else I can try to duplicate the results other folks have had?