Quote from: zard_cz on July 20, 2011, 08:38:03 AM

Great thread. Does anybody has similar tips for 5830 overclock on linux? I have used the aticonfig which does allow core overclocking but the memory speed range it allows me to set is very small (only around 100 less than stock).

Do I need to flash the bios or is there any more advanced tool on linux?

I don't know about 5830s but with my 5850s I can underclock the RAM using AMDOverdriveCtrl. Create a profile and set the RAM clock speed to the speed that you want and then apply it with.

Code:

AMDOverdriveCtrl -b MyProfile.ovdr -i 0

('-i 0' is the interface, run 'AMDOverdriveCtrl --help' to get a list of your interfaces.)

This worked for me with early versions of Catalyst (11.5 and earlier). I was not able to overclock above the BIOS maximum but could go below the minimum with this trick. It is important that you set the same RAM clock setting for all three performance levels.