Sorry to bring up an old thread... I recently got the XFX HD 6850 Black Edition. I can OC it to 950 / 1200 on stock voltage. Any higher and I probably need to increase the voltage. Problem is, neither Trixx or Afterburner will let me. Anyone have any idea why? Not sure if this is related or not but recently I found out my motherboard will not support manual adj or CPU voltages either. Any tips would be appreciated, thanks.
You should probably just start a new thread when they are this old. We would be glad to help you on a new thread.