Hi, I bought Dell XPS 8940 with upgraded graphic card NVIDIA® GeForce® GTX 1650 4GB GDDR6. This graphic card has displayport 1.4. My monitor is Dell 4K monitor with model number S2721QS with displayport 1.2. May I ask what displayport cable should I use to connect this XPS to this monitor? Displayport cable 1.2 or displayport cable 1.4? Many many thanks in advance!