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XPS 420 power upgrade

Discussion in 'Hardware' started by mamothcar, Jan 17, 2011.

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  1. mamothcar

    mamothcar Thread Starter

    Dec 13, 2010
    I have a Dell XPS 420 with the stock 375w power supply - It's Dells house brand I think?

    I would like to put in a 650w or 750w but someone wrote somewhere that the Dell motherboard for this can only use Dell PSU 375w and no more than 425w???

    Some guy on youtube said he has a 650w lsp ultra in his and it works fine!

    What's the story guys can I fry the motherboard on this thing or is it Dell sales fiction?
  2. dustyjay


    Jan 23, 2003
    First Name:
    At one time Dell used propriatary power supplies, and the motherboards were designed to use these power supplies, you could not use another brand without some rewiring of the connector. Dell no longer uses propriatary power supplies. The only limit that I can think of is a possible case size problem.
  3. satanicguardian


    Aug 20, 2007
    I dont think with modern dell systems, anything shud stop u getting a new psu, a good one won't overload your board or anything :eek: go for it :D
  4. flavallee

    flavallee Trusted Advisor

    May 12, 2002
    First Name:
    Here is the on-line owner's manual for the Dell XPS 420 desktop.

    Here is the section on replacing a power supply unit. All the technical specs are for 375 watt and 425 watt models. I didn't see any comments about being able to upgrade to a higher wattage model.

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