Do you, too, use Nvidia Geforce 6800?

I've been using 77.77 drivers since July 2005, with no problems at all in fs9 or FSX. Today, running FSX, I've had my first-ever CDT, and my first Microsoft response to an error report: "Problem caused by Nvidia graphics driver. Recommendation: install an updated driver." The question is: which? Standard advice usually seems to be: the latest Nvidia driver. But I get the impression that the latest drivers only function well with the latest video cards. My one attempt a year ago to update with the latest was a disaster, and I hurried back to dear old 77.77. So this is to ask forum readers: what driver really works for you with your 6800? Your advice would be much appreciated.
Athlon 4000+
2 mb RAM
Nvidia 6800 GT
77.77 driver
Athlon 4000+
2 mb RAM
Nvidia 6800 GT
77.77 driver