Does it matter which DisplayPort slot I use if there's multiple DP ports

slot for the latches to hold the cable to monitor or pc connection Easy fix to eject a display

DisplayPort or a mini DisplayPort output to an HDMI monitor input DP++ or DisplayPort ++ If you want to be totally safe then just get

dp 96 slot My 2nd monitor a BenQ XL2730Z connected to the dell via displayport Unfortunately the upper 2 dp ports are slots for a descrete graphics card

dp96 slot Four Independent Display: HDMI x 2, DP x 2, VGA x 1; Dual Intel® GbE 22802242 M-Key x 2, 30423052 B-Key x 1 + Micro SIM Slot x 1, Mini PCIe x 1