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Last reply by 06-11-2022 Solved
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Add exra USB to xps8950

Hello
 
I am looking to add some extra USB ports to one of the expansion slots on the back of the New XPS Desktop (8950 ?) is there any specific type of pci card i need to get or will any be OK?
 
will something like this be OK
 
USB card.jpg
 

 

 

 7 Port USB 3.0 PCI Express PCIe Controller - 5x External Ports 2 x Internal - 15 pin SATA Power Con...

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@dsmithy20  - The card you linked may not be (easily) compatible.

The spec says:  "...power supply unit with free Molex power connection necessary". <emphasis added>

The XPS 8950 won't have any Molex connectors from the PSU. Assuming the PSU has a spare (unused) SATA power connector, you'd have to get a SATA power>Molex power adapter.

CAVEAT: I don't know if the XPS 8950 uses standard SATA power connections directly from the PSU, or if it's customized and only supplies power to SATA drives via a motherboard connection.

Why not just look for a PCI-e x4 USB card that only needs power from the slot, without any extra power connections?

Ron

   Forum Member since 2004
   I'm not a Dell employee

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@dsmithy20  - The card you linked may not be (easily) compatible.

The spec says:  "...power supply unit with free Molex power connection necessary". <emphasis added>

The XPS 8950 won't have any Molex connectors from the PSU. Assuming the PSU has a spare (unused) SATA power connector, you'd have to get a SATA power>Molex power adapter.

CAVEAT: I don't know if the XPS 8950 uses standard SATA power connections directly from the PSU, or if it's customized and only supplies power to SATA drives via a motherboard connection.

Why not just look for a PCI-e x4 USB card that only needs power from the slot, without any extra power connections?

Ron

   Forum Member since 2004
   I'm not a Dell employee

366

After having a great deal of difficulty communicating with tech support in India; the first two agents appeared not to know what PCIe boards are, I spoke with a third who asked others and finally asked if my OLD USB port PCIe card is SATA.  When I answered YES (btw, I was amazed that I knew the answer), she told me it is NOT compatible.  I HAVE an SATA to Molex powe5r cord so I tried it anyway.  The old PCIe card DOES fit the slot but is shorter where it should be flush with the rear of the PC.  This makes it VERY DIFFICULT to plug a UBS plug into it.  I tried it with my bar code scanner.  The PC did NOT recognize the input!

361

Ron,

 

This is my second reply after 4 attempts to gets answers from Dell tech support in India that is USELESS.  There IS a Molex power outlet in my new XPS8950.  It was sitting tucked into the spare drive bay!  What I am desperately trying to ask Dell's absolutely WORTHLESS tech support is whether an older PCIe card will work!

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Thanks for the reply Ron that's what i wanted to hear, that i could fit a PCI USB card after all .many thanks

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Glad to help...

Ron

   Forum Member since 2004
   I'm not a Dell employee

10 Diamond
356

@aky13  Are you sure it's a Molex power adapter, and not a 6- or 8-pin PCI-e power adapter that's used for a video card?

Molex:

molex.jpg

6-pin PCI-e:

PCI-e.jpg

Exactly what kind of slot does this "older PCI-e card" need? And how old is "older"? Could it be a PCI card, which pre-dates PCI-e? The XPS 8950 doesn't have any PCI slots, only PCI-e slots, and PCI cards aren't compatible with PCI-e slots.

I wouldn't be plugging in incompatible components and connecting power cables from the PSU to them. You could seriously damage this XPS 8950. Time to get a new x4 PCI-e card, that doesn't need an extra power cable?

Ron

   Forum Member since 2004
   I'm not a Dell employee

353

@dsmithy20 Why not use a 15 pin SATA power splitter cable like this: https://www.amazon.com/Benfei-Power-Y-Splitter-Cable-Inches/dp/B07ML447FG

You may have to look for a longer splitter cable if 8 inches is not long enough.

346

Oops, sorry everyone.  NOT MOLEX but 15 pin SATA as referenced by Vic384 5 Tungsten.

I am NOT a computer expert, but I am aware of the difference between PCI and PCIe.  It IS a PCIe board, but the shape is slightly physically different from newer PCIe boards.  I did as suggested.  I ordered an up-to-date board.

THANK YOU for the responses.  I greatly appreciate it ESPECIALLY in view of the horrendous tech support from Dell!

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