They haven't announced this, but looking on their site it's plain to see:
http://www.geforce.com/games-applications/pc-games/nvidia-vr-funhouse
Minimum System Requirements:
Compatible VR HMD: HTC Vive
CPU: Intel Core i7 4790 or higher
OS: Windows 7 or higher
RAM: 5GB or higher
GPU:
Low Graphics Setting
GeForce GTX 1060
GeForce GTX 980 Ti
GeForce GTX TITAN X
GeForce GTX 1070
Medium Graphics Setting
GeForce GTX 1080
High Graphics Setting
One dedicated GPU for Graphics:
GeForce GTX 1080 or greater
GeForce GTX 980Ti in SLI or greater
Plus a dedicated GPU for PhysX:
GeForce GTX 980Ti or greater
http://www.geforce.com/games-applications/pc-games/nvidia-vr-funhouse
Minimum System Requirements:
Compatible VR HMD: HTC Vive
CPU: Intel Core i7 4790 or higher
OS: Windows 7 or higher
RAM: 5GB or higher
GPU:
Low Graphics Setting
GeForce GTX 1060
GeForce GTX 980 Ti
GeForce GTX TITAN X
GeForce GTX 1070
Medium Graphics Setting
GeForce GTX 1080
High Graphics Setting
One dedicated GPU for Graphics:
GeForce GTX 1080 or greater
GeForce GTX 980Ti in SLI or greater
Plus a dedicated GPU for PhysX:
GeForce GTX 980Ti or greater
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