Cables needed to connect Corsair RM750x PSU to Dell XPS 8940 Motherboard

Labmaster · December 25, 2023

I'm trying to upgrade the PSU on a Dell XPS 8940. I know that I really need to start from scratch, but I don't have the budget. I'm trying to keep the mobo/CPU, and upgrade other parts around it first. Maybe next year I can properly replace mobo/CPU.

For now, I need to make a Corsair RM750x work with this Dell motherboard. The Dell pins for power don't match any of the cables that came with the PSU. Does anyone have a suggestion on where I can get adapters or custom cables. I can't even find a proper name for the Dell connectors.

Thanks,

Labmaster

PDifolco · December 25, 2023

4 minutes ago, Labmaster said:

I'm trying to upgrade the PSU on a Dell XPS 8940. I know that I really need to start from scratch, but I don't have the budget. I'm trying to keep the mobo/CPU, and upgrade other parts around it first. Maybe next year I can properly replace mobo/CPU.

For now, I need to make a Corsair RM750x work with this Dell motherboard. The Dell pins for power don't match any of the cables that came with the PSU. Does anyone have a suggestion on where I can get adapters or custom cables. I can't even find a proper name for the Dell connectors.

Thanks,

Labmaster

Pinouts and connectors for Dell crap boards are completely non standard

Unless you have a degree in electricity, don't try anything, get a new board

kirashi · December 25, 2023

4 minutes ago, Labmaster said:

I'm trying to upgrade the PSU on a Dell XPS 8940. I know that I really need to start from scratch, but I don't have the budget. I'm trying to keep the mobo/CPU, and upgrade other parts around it first. Maybe next year I can properly replace mobo/CPU.

For now, I need to make a Corsair RM750x work with this Dell motherboard. The Dell pins for power don't match any of the cables that came with the PSU. Does anyone have a suggestion on where I can get adapters or custom cables. I can't even find a proper name for the Dell connectors.

Thanks,

Labmaster

Luckily enough, someone on Dell's own forums asked this same question. There are some caveats as noted in the thread, so you'll definitely want to give it a read.

https://www.dell.com/community/en/conversations/xps-desktops/xps-8940-750w-psu-replacement/647f9f35f4ccf8a8de3f9769

Looks like the 2x 4-pin connectors are likely just 4-pin EPS power connections, but you'll need an adapter to go from 24-pin motherboard power to Dell's proprietary 6-pin power connection.

https://www.amazon.ca/gp/product/B08M5BZ6P8/

tkitch · December 25, 2023

25 minutes ago, kirashi said:

Luckily enough, someone on Dell's own forums asked this same question. There are some caveats as noted in the thread, so you'll definitely want to give it a read.

https://www.dell.com/community/en/conversations/xps-desktops/xps-8940-750w-psu-replacement/647f9f35f4ccf8a8de3f9769

Looks like the 2x 4-pin connectors are likely just 4-pin EPS power connections, but you'll need an adapter to go from 24-pin motherboard power to Dell's proprietary 6-pin power connection.

https://www.amazon.ca/gp/product/B08M5BZ6P8/

https://www.ebay.com/itm/165366450016

This one has a model that explicitly lists the 8940

Labmaster · December 26, 2023

20 hours ago, kirashi said:

Luckily enough, someone on Dell's own forums asked this same question. There are some caveats as noted in the thread, so you'll definitely want to give it a read.

https://www.dell.com/community/en/conversations/xps-desktops/xps-8940-750w-psu-replacement/647f9f35f4ccf8a8de3f9769

Looks like the 2x 4-pin connectors are likely just 4-pin EPS power connections, but you'll need an adapter to go from 24-pin motherboard power to Dell's proprietary 6-pin power connection.

https://www.amazon.ca/gp/product/B08M5BZ6P8/

Thanks. I read all of these posts and took a look at this adapter. I'm not confident in this product, and I feel like I still need another solution.

I have just enough Christmas money to go get a mid-range board and CPU with Boxing Day sale.

The Dell was supposed to be the school computer that could play some games, and it did an OK job for a couple of years. It sucks that the whole system has to be replaced in order to upgrade PSU and GPU.