Upgrade Dell Optiplex 780 SFF PSU

fcallum77 · Sep 22, 2016

I have a Dell Optiplex 780 SFF and I am looking to upgrade the GPU to an AMD RX 460. I know that this GPU has no power connectors but I don't know if it would work with my PC as it only has a 235 watt PSU and I dont want to upgrade this. I am aware that I would need to buy a short GPU.
My systems specs are:
Intel Core 2 Duo,
235 watt PSU,
4gb ddr3 RAM (I plan to upgrade this)
500GB Seagate Barracuda HDD

clutchc · Sep 22, 2016

I think you are out of luck on several counts. There is no low-profile RX-460 to my knowledge. The other issue is that the RX-480 requires a 380W PSU minimum. And your Dell PSU is proprietary and not easily changed out. Lastly, the 780 SFF requires the gfx card be single-slot due to the location of the PCIe x16 slot.

fcallum77 · Sep 22, 2016

clutchc :

Thanks for replying. I have however heard that a low profile GTX 750 ti can be used with the 235 watt PSU. Is that something that I could try?

Rogue Leader · Sep 22, 2016

The LP 750ti is about the only GOOD GPU that will work in there. We have had several users run it in similar systems to yours.

That said Some SFF systems do not have the space because even though the card is LP it is still wider than 1 slot and needs that space. I suggest measuring before buying.

clutchc · Sep 22, 2016

fcallum77 :

I have this GTX 750 Ti running in my Optiplex 790 SFF: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125680
But I have a 275W PSU with a +12V rail rated for 17A.

However, in your case you can't use the card above because it is double slot width. This one may work: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127836
You'll notice it is a single-slot width. But there still is the issue of your PSU. Can you read the rating for the +12V rail?

Rogue Leader · Sep 22, 2016

Actually even that MSi is double width it just doesn't have the extra bracket. I have had someone with an SFF PC that it did not fit.

clutchc · Sep 22, 2016

Rogue Leader :

Then probably best if the OP measures from the center of his PCIe x16 slot to see if he has the necessary 2.72" width of the card. If it is a no-go, the OP will have to drop back to maybe a GT 730 DDR5 64 bit. That would be safer for his PSU anyway.

fcallum77 · Sep 22, 2016

Rogue Leader :

Thanks. I will look into buying the LP 750ti

fcallum77 · Jan 1, 2017

Okay everybody. I'm back and I have all of the answers for anybody who is interested. In the end, my PC ended up with a:
Core 2 Quad Q9400 at 2.66GHz,
12GB DDR3 RAM at 1066mHz,
Low Profile MSI GTX 750ti with 2GB GDDR5 not overclocked,
500GB Seagate Barracuda at 7200RPM,
I kept the stock 235w PSU and all is working fine.

The graphics card and the HDD don't fit into the computer together thanks to the over-sided HDD caddy. I had to purchase an external hard drive bay and store the hard drive outside of the computer I then had to install Windows to the external hard drive as it is the only drive connected to the computer. This means that the HDD fan wasn't being used but the computer doesn't boot unless the fan is plugged in. I had to mount the fan to the back of the PC because there was no way to mount it to the inside of the PC. Everything works great and I have had no problems.

Thanks for helping me everybody.

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Upgrade Dell Optiplex 780 SFF PSU

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