HP AlphaServer GS80, Upgrade Manual

Page: 80 / 88

B-8 AlphaServer GS80 Upgrade Manual
B.3 Changing the Clock Module Switch Settings
Two switch packs on the clock module control the clock frequency. If
no B4125 CPUs are in the system, the clock can run at the faster speed
(9.0 ns).
Figure B– 2 System Clock Switch Packs
1
2
3
4
5
6
1
1
2
3
4
55.6 MHz/9.0 ns
PK3247
0
S2
S2
S1
0 1
S1
1
2
3
4
5
6
1
1
2
3
4
52.2 MHz/9.6 ns
0
S2
0 1
S1