Upload & Sell: Off
I would start by getting the specs for your video card to confirm those first. It may not be able to output at a high enough resolution. If that is the case, you have a tough choice to either upgrade your laptop, build a desktop or try one of the external video card workarounds (seems like a bit of a hack to me).
As someone who is also working through the process of setting up a PA271W, one thing that I will pass along is that it isn't easy to implement/exploit the full 10 bit data stream these monitors can handle. Most consumer desktop video cards, even if they have a displayport connector, cannot output a 10 bit data stream. The hardware can actually handle it but the manufacturers cripple the driver to prevent it in order to force you to buy a "workstation" video card for lots more money. Additionally, pay the $30 for the displayport cable from NEC and save yourself some hassle. The majority of super cheap displayport cables will just give you trouble when it comes to supporting 10 bit data streams. Been there, done that.