Increasing Microprocessor Speed
b. Attach the microprocessor heat sink. The heat-sink material is clear
anodized, hot-water-sealed, 6061-T6 aluminum. The nut material is 2011-T3
aluminum (this grade is critical). Perform the following steps to attach the
heat sink:
1. Observe antistatic precautions.
2. Align the heat-sink holes with the threaded studs on the ceramic package.
3. Handle the heat sink by the edges and lower it onto the chip package,
4. Set a calibrated torque driver to 15 in-lb, ±2 in-lb, (2.3 Nm, ±0.2 Nm).
5. Insert a nut into the 3/8-inch socket, place on one of the studs, and tighten
6. If the sink/chip/fan clip is used, properly install it by positioning it over
c. Attach the heat-sink fan assembly:
1. Place the fan assembly on top of the heat sink, aligning the fan mounting
2. Using a calibrated torque driver set to 3 in-lb, ±1 in-lb, secure the fan to
3. Plug the fan power/sensor cable into connector J14.
Note:
Memory and Microprocessor Configuration
5–6
taking care not to damage the stud threads.
The torque driver should have a mounted 3/8-inch socket.
to the specified torque. Repeat for the second nut.
the assembly and hooking its ends around the ZIF socket retainers.
holes with the corresponding threaded heat-sink holes. Align the fan so
that the fan power/sensor wires exit the fan closest to connector J14 (see
Figure 2–1). Fan airflow must be directed into the heat sink (fan label fac-
ing down toward the heat sink).
the heat sink with four 6–32 × 0.625-inch screws.
When installing the microprocessor, you must change the frequency of
its clock output by setting the system clock divisor switches, as
described in Section 3.2.