Ok I've found a solution for Gigabyte HD3870 512MB DDR3 Qimonda....
Original Ver 70 locked bios 1.22V

at 859/2100Mhz

Used a Sapphire 3850 512MB DDR3 Qimonda Bios
Ver 71 Unlocked Bios 1.22V ( http://www.techpowerup.com/vgabios/2...12.071108.html )

+ Editor to set 1.22V 2D and 1.32V 3D And now I got 1.38V in Multimeter
@895/2100Mhz

( http://www.computerbase.de/downloads...tor/?url=17592 )