IBM Aptiva 2124 Hardware Maintenance Service page 169

2153/K6 Processor Type Jumper Settings
WARNING: You must verify the exact processor type before setting the
processor type jumpers. The wrong processor type jumper setting
may damage the CPU. The system only supports dual-voltage CPU.
Table 5- 2 Machine Type 2153 Processor Type Jumper Settings
CPU SW1
B
2
K6-2 F N F N F N F F F N F N F F 2-3
266
66MHz
K6S F N F N N N F F F N F N F F 1-2
300
66MHz
K6-2 F N F N N N F F F N F N F F 2-3
300
66MHz
K6-2 N F F F N F F F F N F N N N 2-3
300
100MHz
K6-2 F F F F F F F F F N F N N F 2-3
333
95MHz
K6-2 N F F F F F F F F N F N N N 2-3
350
100MHz
N-On, F-Off
5-6
SW2
B B B B B B B B
3 4 1 2 3 4 5 6
SW3 JPX1
B B B B B
7 8 1 3 4