Computer Help forum

Question

new PSU for XPS 720

by ab0d0n / June 11, 2012 4:50 AM PDT

Hello, I need to get a new PSU in my dell XPS 720. The one in there now when turned on the power button will flash amber. I have done research and the forums I have read say the same thing. I am unplugged the power supply from the power cord and let it sit for about an hour. Once plugged in and turned back on it will start up. After a while the time it needs to be unplugged just keeps getting longer and longer. I have had the MB replaced twice and PSU once via warranty. I am honestly tired of dell "fixing" the problem so I wanted to replace the 750w with a 950w thinking that it just isn't getting enough juice and will fix the problem.

I have a 950w PSU my dad gave me but the problem I seem to be running into is the MB has a 24pin rail and a 20pin rail and the 950w only has a 24pin and not an additional 20pin. Is there any way to make it work or do I have to break the bank and get a new/used/refurbished one that has a 24pin and 20pin cable?

any and all suggestions would be appreciated.

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All Answers

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Answer
Most of the PSU's I see have 20 pin FEATURE.
by R. Proffitt Forum moderator / June 11, 2012 4:54 AM PDT
In reply to: new PSU for XPS 720

The last ones have me slip off the 4 pins from the 24 pin connection. You can also get 24 to 20 pin adapters.

I have yet to find a PSU with both 20 and 24 pin power connectors. I do see them with the dual 20/24 adapters.

Too bad you didn't supply a link to the 950w PSU so I could check it out.
Bob

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sorry about that
by ab0d0n / June 11, 2012 5:02 AM PDT
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Here's the manual for the Dell.
by R. Proffitt Forum moderator / June 11, 2012 5:14 AM PDT
In reply to: sorry about that
http://support.dell.com/support/edocs/systems/xps720/en/OM_EN/NP756A00.pdf


Looking at page 140 and on I see this is what we call a PROPRIETARY system. You'll have to get a new PSU from Dell or possibly pcpowerandcooling.com

No adapter I've seen will do for this but I'm taking your word that the motherboard has both connections. Page 140 seems to show one connection of the 20/24 type.

Bob
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