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Increasing Microprocessor Speed
•
Replace the Digital Semiconductor 21164 microprocessor with an Alpha chip
that has a higher speed rating.
•
Reconfigure the clock divisor jumpers.
4.2.1 Preparatory Information
Caution:
Static-Sensitive Component – Due to the sensitive nature of electronic
components to static electricity, anyone handling the microprocessor
must wear a properly grounded antistatic wriststrap. Use of antistatic
mats, ESD approved workstations, or exercising other good ESD prac-
tices is recommended.
A Samsung 21164 microprocessor with a higher speed rating is available from your
local distributor. See Appendix B for information about supporting products.
When replacing the microprocessor chip, also replace the thermal conducting
GRAFOIL pad. See Appendix B for information about the parts kit, which includes
the heat sink, GRAFOIL pad, two hex nuts, heat-sink clips, 60-mm fan, and four
screws.
4.2.2 Required Tools
The following tools are required when replacing the microprocessor chip:
A TS30 manual nut/torque driver (or equivalent) with the following attachments is
required to affix the heat sink and fan to the microprocessor's IPGA package:
•
1/4-inch hex bit
•
7/16-inch socket with 1/4-inch hex drive
•
#2 Phillips-head screwdriver bit
4.2.3 Removing the 21164 Microprocessor
Remove the microprocessor currently in place at location U55 by performing the fol-
lowing steps:
1. Unplug the fan power/sensor cable from connector J35 (see Figure 2–1).
2. Remove the four 6-32
the heat sink.
3. Remove the fan and fan guard.
Upgrading the AlphaPC 164UX
4–2
X
0.875-inch screws that secure the fan and fan guard to
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