I’m not sure if this is the answer you’re looking for, but the only way I can change clocks outside the cards BIOS limits in Ubuntu is to run AMDOverdriveCtrl from Sourceforge . I open it up and minimize it to the taskbar and then -odsc will let me set the clocks beyond what aticonfig –odgc shows the limits are.
I hope this helps. If not, please rephrase your question. You’re downclocking, and not for mining right?
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