Ok here is an official reply and clarification from nVidia:

Hello,

Thank you for contacting NVIDIA Customer care.

This is Shoaib, assisting you with the query you have.

I understand from your email that you would like to know if FINAL FANTASY is compatible with NVIDIA SLI.

Thank you very much for your interest in our product line. Please click on the below link and find the SLI recommended games.

http://www.game-debate.com/news/?new...ported%20Games

Unfortunately FINAL FANTASY XIV is not compatible with the SLI as per the above link. I would suggest to check with the game developer if the game supports SLI.

SLI performance:

The amount of performance improvement will depend on the application and its ability to scale. Several of today's hottest games see a full 2x increase in performance when using SLI technology with two graphics cards. 3-way NVIDIA SLI technology enables up to 2.8x performance increase over a single GPU. In general, applications running at higher resolutions with higher image quality settings will benefit most.

I look forward for your reply to assist you better.

Regards,
NVIDIA Customer Care