ATX Power Supply in Dell Motherboard

I've bought a standard ATX with sufficient wattage for a GX620 computer desktop (not the tiny model).

Dell advised it would be fine.

It appears to be working, but there are some open holes still in the slot on the motherboard.

I wanted to verify this is safe and the PC's not going to go up in smoke because of this. No adapters were provided with the power supply.

Picture in URL and attachment.

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

If you don't have a 4 pin plug in the power supply that goes there I wouldn't sweat it as long as it's powering on.  If it doesn't power on it's the wrong PS.  But I've seen it both ways.
It has a 24pin connector on the mainboard, so if you have pci cards, etc... that requires the board to have more power you can put a 24pin powersupply in it.  The 20pin power connector only goes in one way on the board, so you cant put it in incorrectly.  Just make sure you have the 4pin connected to the board as well and all should be fine.  I seems that it powers up fine based on your original message.
The one you have is ATX v.1.xx. The socket on your motherboard is ATX12V 2.0X
The ATX12V 2.0 (introduced in February 2003), which defined quite different power distribution from ATX12V 1.x:
  • The main ATX power connector was extended to 24 pins (it is backwards compatible). The extra four pins provide one additional 3.3 V, 5 V and 12 V circuit.
  • The 6-pin AUX connector from ATX12V 1.x was removed because the extra 3.3 V and 5 V circuits which it provided are now incorporated in the 24-pin main connector.
  • Most power is now provided on 12 V rails. The standard specifies that two independent 12 V rails (12 V2 for the 4 pin connector and 12 V1 for everything else) with independent overcurrent protection are needed to meet the power requirements safely (some very high power PSUs have more than two rails, recommendations for such large PSUs are not given by the standard).
  • The power on 3.3 V and 5 V rails was significantly reduced.
  • The power supply is required to include a Serial ATA power cable.
  • Many other specification changes and additions
I underlined above how it would affect you. In other words... it is not going to damage your motherboard, but, if you plug in a video card that requires more power you will need to change it so you are better off not accepting this one but get the one with 24-pins and you won't have to worry in the future.
Bits ...


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.