I had Thoroughbred B 1700+ which I ran 11x200=2205 1.92v on my NF7-S rev1.2

Now I bought a Barton 2500+ which wouldn't do any more than 13x166=2172 1.62v, any higher on the actual MHz would cause prime95 errors or any higher on the bus would cause total hard lockups.

I just did the L12 mod to my mobo making the CPU a normal 133MHz FSB and now I'm doing 11.5x200=2305 1.81v flawlessy

Excellent