Hello,
I have played FFXIV ARR on and off since its release and have noticed serious coding deficiencies in certain parts of the game, here are the various rigs I have owned and played with since the game came out:

i5 2500K - 3.0GHz
Asus Motherboard
256GB Corsair SSD
8GB DDR2
Win 7 x64
Nvidia 760GTX x 2

i7 3770K - 3.3GHz
Asus Motherboard
256GB Corsair SSD
16GB DDR2
Nvidia 780GTX x 2
Win8.1 x64

i7 4790K - 4.0GHz
Asus Sabertooth Mark1 Motherboard
512GB Samsung 850 SSD
16GB DDR3
Nvidia 980GTX x 2
Win 8.1 x64

All three rigs played with (2560x1440) or 3K HD. All rigs have a serious drop in FPS in towns with a crystal nearby.

My latest rig with 980GTX SLI should never see 45 FPS, yet it does in Mor'Dhana.