No, it's definitely not overkill. I have a 650ti as my PhysX card, and it's not quite strong enough in Batman Arkham Origins.
That is to say, it performed great, and I played the whole game at max settings with great framerates, but had I bothered to turn it off and play with just straight SLI, I probably would have gotten slightly higher results.
See the link in my sig to see some charts.
Bottom line: your 750ti will blitz through the PhysX in most older games, will probably be just right for Arkham Origins, and will be probably be very welcome with whatever other PhysX-intensive games come out in the near future.
EDIT: I hope your 750ti is a small form factor one though, so that it doesn't block the fans of your 780s.
No, it's definitely not overkill. I have a 650ti as my PhysX card, and it's not quite strong enough in Batman Arkham Origins.
That is to say, it performed great, and I played the whole game at max settings with great framerates, but had I bothered to turn it off and play with just straight SLI, I probably would have gotten slightly higher results.
See the link in my sig to see some charts.
Bottom line: your 750ti will blitz through the PhysX in most older games, will probably be just right for Arkham Origins, and will be probably be very welcome with whatever other PhysX-intensive games come out in the near future.
EDIT: I hope your 750ti is a small form factor one though, so that it doesn't block the fans of your 780s.
You can disable vsync and use a frame limiter with skyrim. Worked for me, although if you crash,test that that isn't what is causing it. I hope you stick it out until you find the answer, Skyrim was silky smooth with tons of mods (no texture mods) using my GTX570 SLI. I also had to remove tesv.exe from the profile to get it not to stutter.
You can disable vsync and use a frame limiter with skyrim. Worked for me, although if you crash,test that that isn't what is causing it. I hope you stick it out until you find the answer, Skyrim was silky smooth with tons of mods (no texture mods) using my GTX570 SLI. I also had to remove tesv.exe from the profile to get it not to stutter.
That is to say, it performed great, and I played the whole game at max settings with great framerates, but had I bothered to turn it off and play with just straight SLI, I probably would have gotten slightly higher results.
See the link in my sig to see some charts.
Bottom line: your 750ti will blitz through the PhysX in most older games, will probably be just right for Arkham Origins, and will be probably be very welcome with whatever other PhysX-intensive games come out in the near future.
EDIT: I hope your 750ti is a small form factor one though, so that it doesn't block the fans of your 780s.
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