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February 14th, 2024 18:44

XPS 8940 upgrade to a NVIDIA GeForce RTX 4090

XPS 8940

XPS 8940

Presently, an NVIDIA GeForce GTX 1660 Ti card is installed. 

Can I install an NVIDIA GeForce RTX 4090?

Would I need to upgrade the power supply?

2 Intern

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272 Posts

February 14th, 2024 22:33

RTX 4070 Super is the furthest you can go in the 40 series as it pulls the same 220-watt max TDP as the RTX 3070 that it can ship with.  You will need 1 6 to 8-pin adapter to make it work as the secondary 6-pin is missing the 2 additional sense pins. 

You also need the Dell 500-watt PSU. 

You will need to use the 2 fan version, not the triple-fan version. 

(edited)

5 Practitioner

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5.9K Posts

February 14th, 2024 20:46

Whenever upgrading the graphics card, you must certainly upgrade the power supply as well.  The RTX 4090 is a triple slot card and requires 450w power which can not be upgraded with the 8940.

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