Specifications

5–8 Upgrading the AlphaPC 164
Subject to Change – 17 January 1997
Increasing Microprocessor Speed
3. Secure the fan and fan guard to the heat sink with four 6–32
X
0.875-inch
screws.
4. Plug the fan power/sensor cable into connector J21 (see Figure 2–1).
Note:
When installing a 400-MHz, 433-MHz, 466-MHz, or 500-MHz micro-
processor, you must reconfigure the clock divisor jumpers on header J30
as shown in Figure 2–2. You must also change the clock oscillator at
location U34. The clock oscillators and oscillator kit are available from
the sources listed in Appendix D.