Chaos Group has recently presented a new release V-Ray for 3DS Max 2018.
The latest version of V-Ray 3.6 among its key features has a hybrid rendering mode: V-Ray GPU CUDA now renders on CPUs as well as GPUs, to take full advantage of all available hardware.
Other features include:
Nvidia vlink that supports shared GPU memory across NVLink compatible graphics cards
Full light select render elements with support for GI, reflections and refractions for accurate light mixing in post-production
Cryptomatte support to create ID mattes with transparency, depth of field, and motion blur.
Read more on Chaos Group website