Highest oem psu is Dell 460w to 500w proprietary c/w Dell G5 or XPS 8940. You do not need 850w to run 3080ti.  If you do not use dvd, 500w psu is sufficient. basic online psu calculator estimates  Load Wattage: 494 W (i7-10700+3080Ti+sata ssd+hdd, no DVD) You can use aftermarket higher power SFX 24/4 pin psu and 24 to 6 pin adapter. this has been verified to work in 8940. [IMAGE]   [IMAGE]  
Need help finding a proprietary  850watt Dell PSU compatible with Dell Vostro 5880. Ive cross referenced a few Dell Server PSU’s but the pins and wiring diagram dont appear to match. Need this PSU upgrade for a Nvidia RTX 3080ti graphics card and the PSU I have is the 460 watt bronze.   Any help from Dell or anyone that has had experience with the PSU upgrade would be much appreciated.   Thank You  
Need help with a Dell Vostro 5880 850 PSU upgrade