I run a 780ti classy but have a 560ti classy sitting on the shelf and mostly play bf4. The 560ti wouldn't really do anything would it if I threw it in with the 780ti? Thats a very interesting video there. Im unsure if bf4 uses alot of physX or not but theoretically if I put in my 560ti classy and used it for dedicated physx I would gain some fps in games using physX. Interesting......