I also have an xfx 5830 and after seeing this thread switched from puddinpop's miner to phoenix 1.4 (see details below). At a core clock of 970MHz I saw an increase from ~220 MHash/s to ~285 MHash/s.
OS Windows 7 64bit
Catalyst driver: 11.4
Stream version 2.4 (presumably - it's whatever comes with the 11.4 drivers. Anything less won't work for me, at all)
Core clock 970Mhz (somewhere between here and 1000Mhz things get unstable)
Mem clock 560Mhz (can't set it any lower in MSI Afterburner)
voltage is default (unable to change?)
Miner Phoenix 1.4 -k poclbm device=0 platform=1 WORKSIZE=128 AGGRESSION=12 BFI_INT VECTORS
Any suggestions for getting it higher? I seem to be stuck with stream SDK 2.4 and can't raise the core clock much more. For reference, I'm also running a nvidia 260 in the same computer.
This is strange. What happens when you try and downgrade the drivers?
I've tried both 10.3 with stream SDK 2.1 and 2.2 and 10.4 with SDK 2.1 and 2.2. Regardless of combination I get the same problem - whenever I try and run any OpenCL code it just crashes (the command window glazes over and the not responding box pops up). This happens when trying to run rpcminer-opencl.exe on any device (I don't think it even gets as far as finding any usable platforms) and also when I try and run any of the sample code that comes with the SDKs.
Switching back to the 11.4 package fixes the problem and miners and the code examples run fine. Do you reckon it's worth the effort to try and fix this problem and use 2.1 or 2.2? How much faster are they?
Cheers