You are right about the 6pin Peg connector, so the 6pin is importantly
Watch these guys installing a GTX1060



Now this is more interesting
Here one thats is using the 2*6->8peg adapters and it is working as you see, I would then go for the GTX1660ti because that card is on the same power level at 8peg as the GTX1060 on 6peg. So you will never face any power risk, as I still think the GTX1070 is bit to powerful on needed Watts. PSU do get aged.


edit and do a search on the Dell forum lots of good stuff there and also info about bios update.

Last edited by dutch; 04/16/19 06:21 PM.