back to square one .. you buy, you try ,and hope it don't make you cry
look
''No, it will not work. Found out the hard way but oh well, if someone could suggest a cheap motherboard that has uefi bios please do ''
http://www.tomshardware.com/answers/id-3320226/1050ti-760gma-p34-compatible.html
then the thing is buy a NVIDIA reference card from and manufactured by NVidia themselves and save that e-mail telling you yes it will , and then when it don't hold them to it ????
for you and all yuou seem to have to do just to get a card its just not worth in in a old disposable dell prebuilt
iff it did not work all the time cost and headache over the card will cost you way more then that dell is worth to start with
another example
http://en.community.dell.com/support-forums/desktop/f/3515/t/19601491
even if dell don't upgrade the bios uefi or not the cards still may not work like the 900 series did not in till dell gave them XPS guys a new bios that would ??
''The GTX750 is a UEFI card. The Precision 690 was released before UEFI was implemented and may not be compatible with UEFI devices. You would need to check with Dell to see if there were any BIOS updates to allow compatibility with UEFI devices or if the system can run UEFI devices. Otherwise you may need look into Earlier Geforce models for this workstation.''
http://en.community.dell.com/support-forums/desktop/f/3515/t/19602160
old 750 ti's had a switch on them for legacy / uefi use todays 750ti's that been removed
thing is here again on page 2 all saying the 900 series worked well ???
http://en.community.dell.com/support-forums/desktop/f/3515/t/19611857?pi21953=2
that maybe a better bet then I would thingk if a 900 card works so should the 10 series thing is this issue came to light with guys installing the 900 series cards and a lot found they were a no go and failed to work with out proper motherboard bios support for them
anyway its all your call in the end on what you want and need to do
good luck