Hello the team, i've recently bought an ASUS 6950 DirectCU II 2GB, and I try to overclock it, WITHOUT UNLOCKING the Shaders wich only gives 5% of performance more (too risky for so low). I use these two softwares : - Asus SmartDoctor (last version) - ATI Catalyst CCC AMD Overdrive panel (last version 24Oct2011) As i read here and there, i have to : 1. enable AMD OVERDRIVE in CCC and push PowerControlSettings to +20% 2. I did tests and I pushed overclocking to 900Mhz GPU and 1300MHz Memory, with CCC cursors and default voltage (1.1v). My question is simple : do i really have to addd +20% in CCC PowerControlSettings to stabilize overclocking ? Is it power in watts, or power in volts (I think watts, but not sure) ? And of course : when I increase in the PowerControlSettings to +20% in CCC, does it add some voltage as smart doctor could do, or only watts ? More of all : during the overclocking process, do you know how can I detect when my 6950 DirectCU II needs more voltage to work fine ? What are the signs that says "put some more voltage" ? Artifacts ? lags ? I do not know, and i do not want to do mistakes. If my 6950 DirectCU II 2GB is stable at 900Mhz GPUand 5200 MHZ RAM (1300MHZ in CCC) with no voltage increase (default to 1.10V), I think i do not have to use AsusSmart Doctor..but once again, I'm not sure : must i have to use SmartDoctor instead of CCC AMDpanel ? Sorry for my english...not my first language. Best regards, Alex I think i need expert answers.