SuperMac C500/600 Upgrades
The C500 and C600 are unique among Macintosh clones. They were the first clones to use a ZIF socket for easy processor replacement. Umax made processors in speeds from 140 to 280 MHz, as well as the Cache Doubler, which provides a double-speed (80 MHz) level 2 cache.
Both the C500 and C600 are designed around a 40 MHz motherboard, limiting maximum CPU speed compared with machines such as the J700 and S900 that used Apple's daughter card socket with a 50 MHz bus.
| Manufacturer |
CPU Speed |
Cache Size |
Cache Speed |
Estimated US Price |
|
Phase
5 Aptus G4 |
350 MHz | 1 MB | 175 MHz | $499 |
| Aptus G3 | 300 MHz | 1 MB | 150 MHz | $299 |
|
Umax available on close-out from Small Dog Electronics, limited supply |
||||
| 603e/240 | 240 MHz | n/a | n/a | $29 |
|
Cache Doubler (no CPU) works in C500 |
for 280 | 1 MB | 80 MHz | $29 |
| for 240 | 1 MB | 80 MHz | $9 | |
Also visit our Guide to G3 Accelerators for Level 2 Cache Slot for other upgrade options for the C500 and C600.
