Aptiva 1xx and 3xx System Processor Upgrade
As I have said elsewhere, the1xx and 3xx series Aptivas contain nearly identical components. The different model numbers (121, 172, 372, 392, etc.) usually indicate only differences in processor speed, software preload, included memory, and hard drive size. As a result, changing the processor is a matter of simply removing the old one, installing the new one, and changing some jumpers to let the system know what kind of processor you have installed.
The following is a table of processors and corresponding jumper settings. Thanks to Richard Esposito for providing this information.
CPU Speed | External Clock | Jumper JP2 | Multip. | Jumper JP3 | Jumper JP25 |
INTEL 75MHz | 50 MHz | 1-3, 2-4 | 1.5 | 1-3 | 1-2 |
INTEL 90MHz | 60 MHz | 1-3, 4-6 | 1.5 | 1-3 | 1-2 |
INTEL 100MHz | 66.6 MHz | 3-5, 4-6 | 1.5 | 1-3 | 1-2 |
INTEL 120MHz | 60 MHz | 1-3, 4-6 | 2 | 1-3, 2-4 | Open |
INTEL 133MHz | 66.6 MHz | 3-5, 4-6 | 2 | 1-3, 2-4 | Open |
INTEL 150MHz | 60 MHz | 1-3, 4-6 | 2.5 | 1-3, 2-4 | 2-3 |
INTEL 166MHz | 66.6 MHz | 3-5, 4-6 | 2.5 | 1-3, 2-4 | 2-3 |
The following are other Aptiva
1xx and 3xx JP3 settings to consider.
The following are Aptiva 1xx and 3xx JP18 and JP19 settings to consider: