SillyBilly 35 Junior Poster

Nvidia Gforce 7600gt video cards, I have two running SLI. one of them quit after a year or so and I bought another to replace the one.
The bios info on one card is "5.73.22.39.03" And the other is "5.73.22.51.45", notice the last two groups are different? Should they be the same, and if so, How do you update bios on a video card?
The other part is, my card says it will run at
Core Clock 560MHz
Effective Memory Clock 1400MHz
I actually run core at 570, but never tried taking the memory to 1400, 800 is as for as I have went. Is it possible for it to run at 1400?
Thanks for the help.
SillyBilly