How upgrade CPU in Dell Dimension 8400 from 3.0 to 3.6???

Posted on 2005-05-08
Last Modified: 2010-04-26
How upgrade CPU in Dell Dimension 8400 from 3.0 to 3.6???

I have a Dell 8400 with 3.0ghz LGZ775 socket CPU with HT and l2 1mb cache. Also gas DEP.
It is also a 5xx series chip.

May be getting a new Intel chip 3.6 off of ebay that is without a heatsink but was pulled from a Dell.

Do you think the current heatsink and fan will work with this new chip or would some upgrade be needed? Seems like the Dell Heatsink is pretty large.

I know I may need some thermal compund.

Thanks for some answers from people that know this machine pretty well.

Thanks, Peter
Question by:pacumming
    LVL 10

    Expert Comment

    Dell only has one heatsink available for the 8400, no matter what cpu is in it.  The heatsink should be a big tower with 6 heatpipes, it should work just fine for processors from celeron 2.53 to p4 prescott 3.8.

    Author Comment

    Fan should be fine too?

    Do I need anything other than thermal compund? And how do I use this?

    Thanks, Peter
    LVL 10

    Accepted Solution

    there is only one fan for the system as well, so the one you have should be fine.  You absolutely need to use thermal paste, the purpose of thermal paste is the make sure there is good contact between the processor and the heatsink (as there are most likely small surface irregularities on the processor and heatsink, the paste fills in the little gaps and allows for good heat dissipation).  Use thermal paste according to the instructions here:
    now, this walkthrough shows an amd proc, but you do the exact same thing for an intel proc (the only difference is you will apply thermal paste the the entire top of the processor because the die is covered by a large heat spreader).  Remember, by changing the system from its original factory configuration you will void your warranty if anything is damaged while doing the installation, especially if you tell dell about it ;)
    good luck

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