According to this site and the suggested system requirements, a GPU from GTX 1050 on up would be compatible. Also this page from Adobe has a little more. Of course the better the GPU then the better the performance.
Hi, I see a recommendation from Dell for the GTX 1060 X6G as a way to upgrade the XPS 8700 video card for gaming.  An upgrade that would not need an increase in the power supply.  I'm not certain this is still the current recommendation, and also I'm wondering if this upgrade would also allow use of the GPU in Adobe Photoshop CC 2020. Thank you! 
XPS 8700, GTX 1060 X6G upgrade?