5.Disconnect the fan cable from the system board connector labeled CPUFAN (1), and then lift the heat sink from atop the processor (2).

When reinstalling the fan sink, make sure that its bottom has been cleaned with an alcohol wipe and fresh thermal grease has been applied to the top of the processor.

CAUTION: Fan sink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the fan sink on the processor to avoid damage that could require replacing the system board.

Make sure to replace the fan duct. Failure to install the fan duct may cause the computer to overheat.

Processor

Description

Spare part number

 

 

Intel Core i7 processor (includes thermal material)

 

 

 

4770, 3.4 GHz, 8-MB L3 cache, 86W

727373-001

 

 

Intel Core i5 processors (include thermal material)

 

 

 

4670, 3.4 GHz, 6-MB L3 cache, 86W

727381-001

 

 

4570, 3.2 GHz, 6-MB L3 cache, 86W

727380-001

 

 

1.Prepare the computer for disassembly (Preparation for disassembly on page 94).

2.Remove the access panel (Access panel on page 95).

3.Remove the fan duct (Fan duct on page 124).

4.Remove the fan sink (Fan sink on page 135).

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Chapter 6 Removal and replacement procedures: Small Form Factor (SFF)