5200 and refresh rate using Dell M770 Monitor

Got my new XPS system today video ready without a monitor. I am using the 5200 (yes I know I should upgrade that ASAP ) and am hooking it up to my M770 monitor. I am using the default drivers that came with the system and have manually installed the M770. The display regardless of resolution has a slight flicker. The refresh rates available are 75 and 85. On my old 1.9 system my refresh rate was set to 60 and it displayed no flicker using ti4200 and running XP Pro just like my new system. First thing I am going to do is d/l the drivers from nvidia and see if that helps, good start? or should I look at some advanced settings to get this to stop flicker?

Thanks

B