my single 5830 rocks out at around 292 ocd to 1010
that seems a tad low.. i hit 314 with 990 clocks.. I hit 328 with 1020 clock but I start to hit the edge of stability. I can push it to 330 with 1033 but then it stops mining in about 30 minutes and pretty much anything I do to the desktop crashes the display are you using phatk or poclbm? I just noticed i get arround your numbers with poclbm.
My 5830
990 core, 355 mem(but doesnt seem to matter on mem)
using phoenix with the 3% phatk edit.
vectors BFI_INT -k Phatk fastloop=false worksize=256 aggression=12
(upping the work size from 128 to 256 game me about 3% faster as well)