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New Power Supply for Dell Dimensions Desktop!

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#1 cap2587


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Posted 26 November 2009 - 11:32 PM

I need to replace the PSU in a Dell Dimensions 8400 because the fan is making a terrible loud noise. I replaced a PSU in a Dell Optiplex recently which uses the same case as the Dimension with the CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS Certified Compatible with Core i7 Power Supply - Retail. The only problem with this is that I had to cut a whole in the back of the case as the power outlet did not match up and there was no room for the switch. I would like to avoid that problem this time when I buy a new PSU for the Dimensions 8400. How do I make sure that the fit of the PSU matches the exact structure of the back of the case. Thanks.

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#2 dpunisher


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Posted 26 November 2009 - 11:43 PM

You can't.

I run into that on Dells and HP/Compaqs on a semi regular basis when installing new ATX PSUs. Sometimes only 3 PSU screws line up as well.

Those cases are non standard and you end up having to buy a substandard replacement OEM PSU for lots of money if you want a direct fit. I am very good with the tin snips and don't mind doing a bit of case trimming (customer knows beforehand what the deal is).

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)

#3 cap2587

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Posted 27 November 2009 - 08:28 AM

I totally understand. I think I am going to go with your option of snipping the back of the case and getting a better PSU. Can you look at these PSU that are one day deals on Newegg and tell me what you would go with.

http://www.newegg.com/Product/ProductRevie...rds)&Page=3 ($22 after MIR)

($20 after MIR)

($30 after MIR)

Thanks for your help! Here is the link to Newegg's Black Friday 1 day sale.


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