It should work if you have a 650 watt PSU or better. There is a 'revision 1' and a 'revision 2' version out there, so shop smartly.

What CPU do you have?

read Hanover excellent write up on gpu upgrade in 8930 here.

https://www.dell.com/community/XPS-Desktops/XPS-8930-aftermarket-graphic-card-support/td-p/6108418

I just purchased a Gigabyte 3060 V2 with 8gb RAM and installed it easily.  Turned the computer back on and it booted up right away.  Downloaded the Gigabyte control center and new drivers.  Couldn't have been easier.  No upgrade in PSU needed and the 6+2 connector worked perfectly with the 8 pin one on the card.  While the 8930 has a PCIe 3 (and not 4 like on the card), speed and performance is markedly improved compared to the 1050 which shipped with the system.