This game definitely tanks in cities, especially with all the AFK'ers and such.

ASRock Z68 Gen3Pro3
Intel i7 2600k @ 4.2Ghz
2x Sapphire Radeon HD 7970s @ 1050/1575
16Gbs Corsair Vengeance CL9 @ 1.5v
Corsair TX750
Corsair Carbide 500R
Win 8 Pro

FPS @ 1440p:
Max - 220 FPS
Min - 24 FPS
FFXIV benchmark score - 13350k

FPS @ 1080p:
Max - 250 FPS (I think the game is limited or I got CPU limited)
Min - 25 FPS
FFXIV Benchmark score -20100K

Depending on your system, overclocking is a good means to get some extra performance. Just make sure your hardware can handle it. I've upgraded all my CPUs before they've been damaged. Shoot, my i7 930 that had a 45% Overclock is now entering it's ~5th year of service and running strong.