HP E1Z74UT User Manual download pdf (Page 137)

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

4770, 3.4 GHz, 8-MB L3 cache, 86W 727373-001

Intel Core i5 processors

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 85).

2. Remove the access panel (Access panel on page 86).

3. Remove the fan duct (

Fan duct on page 115).

4. Remove the fan sink (

Fan sink on page 126).

Processor

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HP E1Z74UT User Manual Page 137