i have a question is the xps 8950 psu compatible with the 3910 ?

user validated 500w psu for 3910 includes TPX56 for Precision 3660

https://www.dell.com/community/en/conversations/inspiron-desktops/user-validated-500w-dell-oem-psu-for-inspiron-3910/647fa316f4ccf8a8de8d5a28?keyword=500w

https://www.ebay.com/itm/364825731944

XPS 8050 750/1000w psu have not yet been directly validated by user in 3910.  but Dell has validated those for 3660, so they should work for 3910 too.

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)
PNWT1 460W Bronze, Acbel (XPS 8950, Aurora R13/R14)
389MC 460W Bronze, Chicony (XPS 8950, Aurora R13/R14)
T63HC 460W Bronze, Huntkey (XPS 8950, Aurora R13/R14)

@redxps630​ so in theory a t63hc 460w psu should work with the 3910?

I think so.