Forum Thread

Dell Inspiron I3847 - desktop power supply - standard ATX?

hpark21 602 146 April 29, 2016 at 06:52 PM
Is the power supply of relatively recent Dell desktop regular ATX? (I5-4460 with 8GB of RAM).

Years ago, I remember Dells to have proprietary power supply. I am considering vid card upgrade but I don't know 300w PS can handle newer vid card (I currently have 750TI).

I do have couple of spare ATX PS (430W Corsair with modular cabling and EVGA 600W 80+)

I am just wondering whether I can just swap out the PS now a days.

Thanks.

12 Comments

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#2
It's standard ATX these days.
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#3
trhis guy had no issues you can try it
http://www.amazon.com/Dell-Inspir...B00K0HMT1G

Of course, there was one problem: Power. The Dell Inspiron i3847-5078BK comes with a very basic 300-watt power supply, and no, it does not have PCI-E connections. That meant swapping over my Corsair RM550 so that I could provide power to my Radeon card... And then, as long as I was in there, I mounted a second and third hard drive. I had to provide an extra SATA connector, and to be clear, there is no third HDD bay, but I happened to have a 5.25 caddy around, and so my third hard drive fit nicely in the second optical drive bay (which I wouldn't have needed, anyway... I really don't see the point to two optical drives unless you do a lot of disc-to-disc copying). While I was making changes, I decided to pull the stock DVD-RW drive (not a bad drive, mind you) and replace it with my own BD-RW drive.
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#4
I had a Dell Optiplex 745 [It's still here but not used]. The power supply died, I should have taken it apart and replaced a $2.00 capacitor but oh well I didn't. Instead I figured I would get a PS that was 500 watts just because I could. I shouldn't have done that.

The original PS worked great [before it went bad] but the new one refused to allow the CPU fan to function correctly. The fan worked but the BIOS would not read any RPM's from it and so it would keep giving an error on every reboot, after awhile I thought maybe the fan screwed up at the same time of the PS failure so I replaced it with the exact same model fan. That didn't fix anything.

The point of my reply is that a standard ATX power supply will probably work fine but there could also be a comparability issue.
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#5
Quote from dale_101798 View Post :
I had a Dell Optiplex 745 [It's still here but not used]. The power supply died, I should have taken it apart and replaced a $2.00 capacitor but oh well I didn't. Instead I figured I would get a PS that was 500 watts just because I could. I shouldn't have done that.

The original PS worked great [before it went bad] but the new one refused to allow the CPU fan to function correctly. The fan worked but the BIOS would not read any RPM's from it and so it would keep giving an error on every reboot, after awhile I thought maybe the fan screwed up at the same time of the PS failure so I replaced it with the exact same model fan. That didn't fix anything.

The point of my reply is that a standard ATX power supply will probably work fine but there could also be a comparability issue.
The PSU shouldn't have any impact on the motherboards ability to read the speed of a fan connected directly to the motherboard. I suspect something else caused your woes. I have rarely seen a PSU with a 3 pin fan connector that has to be connected to the motherboard.

As long as the mobo power connector is the same you should be good. https://en.wikipedia.org/wiki/ATX#Power_supply

much older dell's used a non-standard connector for the motherboard
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#6
I swapped out a PS last year on a brand new 3847 so I could add a video card. It was a generic run of mill ATX PS from my older AMD based white box and put the Dell PS in the white box. No problems at all. I also have a relatively new Optiplex 9020 i7 and the PS it is NOT standard, you need to make or buy prefab adapters to connect to the proprietary ones on the Dell MB to make it work. Its not a "gaming" machine so a GTX750 is good enough and works with the standard PS.
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Last edited by nolife May 1, 2016 at 08:00 AM
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#7
Quote from nolife View Post :
I also have a relatively new Optiplex 9020 i7 and the PS it is NOT standard
It is a standard full size 9020 or one of the small form factor variants?
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#8
Quote from jkee View Post :
It is a standard full size 9020 or one of the small form factor variants?
Mini tower version, the biggest option for a 9020, not the SFF or the USFF. Same layout and form factor as the Inspiron 3847

Nothing close to a standard 20/24 ATX in there
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Last edited by nolife May 1, 2016 at 04:37 PM

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#9
if i recall Dell swapped 2 wires in the power connector HP used to do something similar
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#10
Quote from komondor View Post :
if i recall Dell swapped 2 wires in the power connector HP used to do something similar
The one pictured above doesn't even use the standard 24 pin connector, it's broken up between 2 connectors.
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#11
Quote from jkee View Post :
The one pictured above doesn't even use the standard 24 pin connector, it's broken up between 2 connectors.
Yes, the power supply has 2 bundles of wires coming out of it.
The white 8 pin above the sata ports, a 4 pin at the upper left of the CPU (not a standard ATX +4 pin either)

The power for the sata drives comes off of the black 8 pin attached directly to the MB just below the sata ports, not from the power supply itself.

Again, this is a late 2015 Optiplex 9020 mini tower. Nothing like the Inspiron.
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#12
Quote from jkee View Post :
The PSU shouldn't have any impact on the motherboards ability to read the speed of a fan connected directly to the motherboard. I suspect something else caused your woes. I have rarely seen a PSU with a 3 pin fan connector that has to be connected to the motherboard.

As long as the mobo power connector is the same you should be good. https://en.wikipedia.org/wiki/ATX#Power_supply

much older dell's used a non-standard connector for the motherboard
How right you are.

I dug that PC out of storage and gave it another look. I found a blown [bulging] CAP on the motherboard. I imagine that is the problem.
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#13
Dell is cool in that you can go to support.dell.com, put in the service tag # from the machine and see all kinds of great things you might need that are relative to that one machine: driver downloads, software updates and manuals are just a few things. Look for replacement parts.
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