So i've been debating this for a while, but i've had 3 monitors working on my 560 ti and integrated together, and want to get into 3 monitor gaming (5760x1080).
i see 3 options:
1) sell 560ti and get 670 - either 2gb or 4gb.
2) get 2nd 560 ti for SLI, though i worry 1gb ram will be a huge bottleneck for 5760x1080 & i hear its a 3 monitors/ SLI is a hassle
3) keep 560ti, get 670, have one do physX
any of these options is about ~$150-200 except the last one but i'm not sure if thats a good option.
The 670 would be a better option you will only get 1 gigabyte even if you were to sli with the 560's. 2 cards will not give you 2 gibaybtes so your ram will be very limited in a multi monitor configuration. Can you post your specs please. Also have you looked into eyefinity from amd its a superior product in terms of multi monitor support.
My personal opinion is that you would have a easier time with 3 screens if you were to go with 2 670's. And then if you wanted physx with games like Batman AC/AA, or Borderlands 2 you could use your 560 if you have 3 pci express slots. You wouldn't need use a sli bridge to use it as a physx card but you would have a higher power requirement if you went that route.
Also here is a 4 gigabyte galaxy review for surround the 5760x1080 res bench
I'm not like a fanatic but the graphics of Crysis and Metro do impress me and i enjoy playing em. I just thought since i have 3 monitors, i'd like to try 5760x1080 gaming and see what it's like, so i don't need something that can pump out ultra on 5760x1080 but i'm trying to be as cost effective as i can.
I gotcha well then I would get the 670 with the higher memory the 4 gigabyte model and if you had games that used nvidia physx use your 560. Something like this only reason I suggest from evga is that recently I ended up troubleshooting a issue with my gigabyte 670 and they said if i were to RMA I would have a 2-3 week turn around on the card I know EVGA has better support then that
You can still use lucidlogix its a pretty brilliant solution. It would help say if you are rendering something and you want to play a game at the same time your igpu will take care of the rendering or uploading to youtube or something while you play your games with no performance loss. I believe that is the only purpose for it. I set my physx setting to automatic it will choose the best option which will be your 670.