They don't achieve 1000 on the G3, the early G4 uses the same zif and achieves the 1000 MHz as a G3 with the 100 MHz bus speed. Again the blue and white is closer to a beige G3 and had a few motherboard revisions to fix issues and such. The hop to the G4 had all the fixes basically.

If you do a google search on blue and white G3 jumper settings and get some hard drive jumpers (how most put G3 and G4 stock CPUs in to overclock) then you can check jumper settings. There should be a chart with all three machines together. Beige, B&W, and the G4.

I used to have it but do not now.

Good luck.