Yes, the system bus speed may increase or decrease depending on which processor card is installed in the computer. Some processor speed upgrades will result in a faster bus speed, and some will result in a slower bus speed.
The table below shows the microprocessor clock speeds along with the corresponding processor bus speeds.
| Processor Upgrade Card | Processor Bus Speed |
| 100 MHz | 50.0 MHz |
| 120 MHz | 40.0 MHz |
| 132 MHz | 44.0 MHz |
| 150 MHz | 50.0 MHz |
| 166 MHz | 48.0 MHz |
| 180 MHz | 45.0 MHz |
| 200 MHz | 50.0 MHz |
| 233 MHz | 46.6 MHz |