Gaming cards are not supported. While the price may be there, experience has shown me issues with gaming cards. If they're putting money into it, I would stay away as there's no way to guarantee performance with the GeForce/Radeon cards.
please read this
we use BOXX system for all SW seats here and I'm not familiar with XI computer; however, XI builds computers for 3D software so he'd better pick a low-end 3D computer (which was tested and verified by application engineers) and customize it up to his budget
If he's a student and he is willing to live with the crashes that may or may not happen with the gaming card while using SolidWorks I would not advise against it. Of course if he was starting a company and he has to bill his hours then I would advise paying the price for a professional card.
From the specs I'm assuming he is more interested in a good gaming rig that would be used for SolidWorks than the other way around.