XPS 8960, change power supply?

do you have the 1000w or 750w psu?  I would ask Dell to replace it with a psu made by a different psu manufacturer. they share psu with 8950.  although 8960 mobo has 12 pin socket, only the 1350w psu actually has all 12 pin connector while the 1000/750 have 10 pin connector c/w 12 pin socket.

43YPM 1000W Acbel (XPS 8950, Aurora R13/R14, Precision 3660)
R61D8 1000W Liteon (XPS 8950, Aurora R13/R14, Precision 3660)
RD0G0 1000W Delta (XPS 8950, Aurora R13/R14, Precision 3660)
MP23Y 750W, Acbel (XPS 8950, Aurora R13/R14, Precision 3660)
M92DC 750W, Chicony (XPS 8950, Aurora R13/R14, Precision 3660)
M2G8X 750W, LiteOn (XPS 8950, Aurora R13/R14, Precision 3660)

Thank you for the quick response. 

I have the 750W PSU, whilst I like Dell Premium support (they've been pretty decent about replacing these bits so far and reasonably quick in doing so) I do feel that asking for that would be slightly beyond them! 

I was really hoping to find out if there was a way forward if the dell PSU didn't work out. 

if warranty expires and you like to replace the psu then you would need to purchase from thirdparty or Dell parts.  It is a proprietary psu which is designed and made for Dell only.

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@redxps630 wrote:

"... you would need to purchase from third party or Dell parts.  It is a proprietary psu which is designed and made for Dell only."

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Wait ... if the PSU is proprietary, how can you purchase from a third party?

a third party reselling Dell oem psu.

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@redxps630 wrote:

a third party reselling Dell oem psu.

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Duh! 🤪 (slapping my head)

Apologies, perhaps some more clarity would be useful, I had seen that on previous models people had found the relevant connectors to use aftermarket power supplies in their older XPS machines, I'm hoping that someone might have some insight as to how or what connectors would be required to use an off the shelf PSU in this machine. 

There are no 'off the shelf' PSU's that will work in the XPS 8960 . . . hence the "Proprietary" characterization. You could purchase the Dell 1350 watt PSU and perhaps have better luck.

In the older XPS machines the PSU was standard ATX format.