Originally Posted by Sukkapunched
I mainly play WoW, LoL, CS:GO and many games coming out soon appeal to me, especially BF1.
I don't think any of the games you listed support GPU/Hardware PhysX (or even CPU PhysX at all for that matter, most use other physics engines), thus a dedicated PhysX card won't do you good for those.
Many people aren't aware that "PhysX" only describes Nvidia's PhysX physics engine/framework. Many mistakenly call all physics engines "PhysX", which isn't right, as those aren't normally GPU accelerated.
Also, there is CPU phyiscs and GPU aka Hardware physics. The former only utilizes the CPU and thus a dedicated PhysX card won't do any good there, while the latter only works with a dedicated PhysX card.
That said, a 970 would likely be a great PhysX card in combination with a 1080 as a main GPU. I myself am currently running a GTX 1060 Mini as dedicated PhysX card to support my Titan X (Pascal). This combination works really well in games that support GPU PhysX like Batman: Arkham Knight. In that game only with the dedicated PhysX card my minimum framerate stays around 60FPS at 3840x2160 with maxed out details and Gameworks/PhysX effects enabled. With just the Titan X handling the rendering and PhysX, the FPS drop down into the lower 40s during PhysX heavy scenes which causes unsmooth gameplay.
So yeah, a dedicated PhysX card (if powerful enough with enough CUDA cores and ROPs to handle physics efficiently enough) can immensely help with performance in games that support Hardware/GPU PhysX, but it all depends on the game as well.
That said, not all that many games support GPU PhysX, so it isn't really worth it if your favorite games don't. You can check the list of PhysX enabled games here
to see if anything you like to play is on it.Edited by Glzmo - 8/25/16 at 2:57pm