Just wondering folks. Would a G4 board and CPU fit in a G3 B/W case?
*Which* G4 do you have? There were several variations. Some of the earlier G4s (Yikes, Sawtooth, Digital Audio) *might* fit, but the later ones (Quicksilver, Mirrored Drive Doors) likely will not.
If I remember correctly, there's one case mounting post that has to be removed for a Sawtooth board to fit in a Blue and White G3 case. The Yikes and Sawtooth power supply pinouts are the same.
There are minor differences in the location and sizes of parts of the cases. For instance, the fan housing of the B&W is a slightly different size and location than the one in the Yikes, making it a problem with installing the hard drives if you switch out one for the other--which way, I don't remember. It may be there could be a problem closing the case because of the heatsinks. Only one way to know. If you try, let us know what happened.