Before removing the heat sink/fan assembly, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 38).
2. Remove the bottom cover (see Bottom cover on page 38).
3. Disconnect the battery cable from the system board (see Removing and reinstalling the same
battery on page 41).
Remove the heat sink/fan assembly:
1. Loosen the six captive Phillips screws (1) from the fans.
2. In the order indicated on the heat sink, loosen the seven captive Phillips screws (2).
3. Disconnect both fan cables from the system board connectors (3).
4. Lift the bottom of the heat sink/fan assembly (4) up, and then pull the assembly (5) into the
computer to remove it.
5. On models with 5070Ti, 5080, or 5090 graphics, remove the screw (6) from the SSD cover that is
soldered onto the heat sink.
6. Each time the heat sink is removed, thoroughly clean and replace the gray thermal grease (1) and
white thermal grease (2) from the surface of the heat sink and system board. You do not need to
replace the thermal pads (3). Different thermal modules are available depending on processor and
graphics. The primary SSD cover is soldered on the thermal module only on models with 5070Ti,
5080, and 5090 graphics.
Models with 5070Ti, 5080 and 5090 graphics: Replace the two square sealing foam pieces around
the gray thermal grease on the heat sink. Reapply the grease using the included prefilled syringe
to approximately 0.3 mm thickness* on the inner area of the foam pieces, making sure the grease
does not squeeze out of the sealing foam pieces after the heat sink is assembled onto the system
board. You must contain the new thermal grease in a sealed space (do not let if leak onto the
system board) to avoid damage to the system board. Thoroughly clean the gray and white grease
from system boards that you plan to recycle, because the gray grease will no longer be in a sealed
space, and the white grease hardens over time, making it difficult to remove during onboard device
replacement.
56
Chapter 7 Removal and replacement procedures for authorized service provider parts
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