The game generally runs pretty well, but I would like to render the game at something like 5120x2160 to help with aliasing (currently run at my monitor's native res of 3440x1440), since the only options for AA is FXAA which is pretty close to useless. I'm also running the game in full-screen mode.

Specs:
Intel i7 4790k, stock 4.0 GHz (4.4 GHz turbo) clock speed.
x2 EVGA Superclocked GTX 980 in SLI
8GB of ADATA 1333 MHz RAM
Samsung 850 PRO SSD

I currently run the game off a single GPU instead of with SLI enabled, I get random frame chugs to like 50FPS in areas where it has no reason to happen. I tried forcing alternate frame rendering 2 mode, but that didn't have any discernible effect. Are there any hoops I can jump through to get SLI to provide a performance boost? With that I should be able to bump up the resolution quite a bit and get some jaggies to go away.

Secondly, since MMOs tend to be pretty hard on the CPU, would I see any performance gains from overclocking? FF14 seems to only utilize 3, maybe 3 CPU threads, so it doesn't seem very well optimized in the first place, so I'd imagine I wouldn't see massive gains from a modest overclock.

Anyone have ideas?