.... I'll give you 1 guess on whether I knew that trick ;-)
By changing the PLL?
Oh gosh! It's just a jumper block!
Code:
(S = Jumper present or "Set", " " = no jumper)
Multiple | 4 | 3 | 2 | 1 |
- -----------+---+---+---+---+
3x 300 MHz | | S | S | S |
- -----------+---+---+---+---+
3.5x 350 MHz | | | | S |
- -----------+---+---+---+---+
4x 400 MHz | | S | | S |
- -----------+---+---+---+---+
4.5x 450 MHz | S | | | |
- -----------+---+---+---+---+
5x 500 MHz | | S | | |
- -----------+---+---+---+---+
So, upgrading from 350MHz to 400MHz involves adding a jumper at jumper 3. I'm not massively into upgrading the performance of vintage Macs, mostly because I want the experience of the period. But I'm happy to do period-correct, options. Hence, my PB1400cs/117 upgraded to PB1400c/166. So I'd certainly be up for upgrading a 350MHz B&W G3 to 400MHz!
But I wouldn't upgrade a PB1400 to a G3, or a 250MHz PPC603e. I wouldn't upgrade the B&W G3 to 1GHz or swap for a G4 if that was possible.
I wonder if I can just pull out the metal prongs from a jumper I have and insert them into the block?
