I was wondering why you guys do this, isn't overclocking going to get your better performance?
Also, how do I flash my 5830s through Linux? Or would I need windows to do this job?
In my usable range (150-1125), I actually get a performance decrease at 150, increase at 300, and decrease above. I dunno.
No, you don't need windows to flash. There are guides out there on how to use unetbootin to create a FreeDOS bootable thumbie. Put atiflash.exe on there.
Use atiflash.exe to dump your existing BIOS.
Boot back into Linux, set up Wine. Run the "Radeon Bios Editor" in Wine (you have to get vb6 with winetricks or whatever). Edit the BIOS you dumped with atiflash.exe. Copy that to the thumbie.
Boot off the thumbie, write the BIOS back with atiflash.exe.
Reboot to Linux - you're done.