At 900mhz, the voltage doesn't have to be that high. I was running 9 x 100 at only 1.675, and it was rock steady. One thing to note though, a higher fsb is definately better and it'll be faster! If you think your ram can handle it, run the fsb higher and the multiplier lower. I'm running now at 8 x 113, which is 904, about the same as 9 x 100, but its definately faster in both cpu and especially memory benchmarks. One of my 2 128 sticks is only pc100 too.
Heifetz