Hello, First up, I know for a fact that my cards do not use the volterra controllers. My cards are PowerColor 4890 PCS+.. I have tried numerous ways of changing my voltages but I cannot (due to them not being volterra) BUT, when I have a look in RBE, the option 'View/Change voltage registers' is enabled. So, does this mean that I can actually change my voltages through a BIOS flash? If so, say I want to increase it to 1.35v, I change it in the '0x18' box and also in the all of the PowerPlay Clock Info boxes (i.e. 02,03,04, etc) I have read the tutorial and everything and know the risk etc.. but I do have another card so I can flash the BIOS back if something goes wrong. From my understanding though I shouldnt be able to do this so dont know whats up!