I actually wanna overclock my hd 6670 1gddr3.....i tried ALL THE softwares like afterburner , trixx etc but all in vain...so I thought of flashing but I dont know whats THE HIGHEST VOLTAGE supported by this card.i dont need to think of temps as I got enough COOLING solutions in my cabnit .its a Sapphire hd 6670 1gddr3.