NVIDIA has currently been bundling keys for the upcoming Witcher 3: Wild Hunt game with GeForce GTX 980 and GTX 970 cards. Getting one free game is great, but NVIDIA wanted to give you even more and now a second game code will be added, this time for Batman: Arkham Knight.
That is a value of over $100, plus of course you are getting a great graphics card as well! Both of these games are built on NVIDIA GameWorks and should play great on either the GTX 980 or GTX 970. This promotion should launch in the next few days or next week!