I tried adding these options.
Option "ModeValidation" "NoMaxPClkCheck"
Option "ModeValidation" "NoEdidMaxPClkCheck"
Neither seemed to change anything. I thought that both the card and the cable that I have are dual-link capable. The card is connected via dvi to the 20 inch monitor. I had a problem similar to this some time back
. I guess if worst comes to worst I can always go go back to 9755.