HI, I wonder if somebody could help me with a small issue I am having with my new GTX 275 Golden Sample. It is all installed and working fine (and fast) except that the enhanced mode button in the EXPERTool software is not available. I was led to believe that this button should be available to overclock all Golden Sample editions to clock speeds that Gainward will still warrant. I have tried installing numerous different drivers, and altertnative versions of EXPERTool, and nothing. IT's not a big problem to be honest as the card is far faster than the 8800GTS 640 it replaced, but it is annoying not to have access to a feature that I should have. Any ideas? Thanks in Advance.