Hello guys!! Can anybody tell me how I can reduce the frequency to my HD4870 when it works in 2D? I have tried to reduce it with Radeon Bios Editor (RBE 1.11) but I cant do it works: First creating a firmware backup with GPU-Z (128kb). Later I have edited it with the RBE in "ClockSettings" menu changing the values into "ClockInfo" #1, #4 and #7, lowering the GPU 500MHz to 160MHz, the memory from 900MHz to 200MHz and the voltage from 1.2 to 0.9v. Then I have saved this BIOS mod and installed it with "ATi Winflash 2.0.12", restart the system, and then, I have opened the GPU-Z again and that doesn't works... Where is the error? Thank you, regards!!.