Hi, I was wondering how I could turn my Geforce 6800 GT into an Ultra. I tried so many bios flashes and so many mods to the bios using NiBiTor v2.6 but every time i set the clocks to above Core: 400MHZ Mem: 1100mhz and run a game i end up with artifacts. I have great cooling on it Arctic Cooling NV5 Silencer Rev.3. I don't think it is because of the temperature because when i check it says 47 degrees celsius. But if i overclock the GT without Ultra bios flash it works up to Core:430MHZ Mem:1150mhz. All i want to do is to make my GT into an Ultra from 1.3 volts to 1.4volts as well and stable at the following clocks Core: 440mhz Mem: 1200mhz :giddy: