Quote Originally Posted by Ket View Post
If CCC doesn't work with a voltage increase through the vBIOS its probable that voltage is LOCKED, or simply not supported. As yet I haven't found a way to go over 1.15v vBIOS set without CCC refusing to work properly. Its unfortunate really. With 1.25-1.3v pretty much every HD5830 would do 1GHz+ on the GPU which make no mistake is a magical number where performance really pops a gear. With 1GHz GPU and around 1250MHz vRAM your getting performance around a stock HD5850 for £55-£60 less minimum.
What I meant CCC doesn't work is the overclocking tab. It just like twitches out, same as my 4870 with custom 2D and 3D voltages.

Since i don't have the card with me, I am unable to personally try it out on my 5830.