I am starting to learn Cuda programming for scientific computing (in particular computational quantum chemistry) and I would like to test my programs on a decent Cuda-enabled GPU. The Intel HD Graphics 4000 1024 MB integrated in my MacBook Pro (Mid 2012) does not meet exactly my expectations. Recently Nvidia announced the GTX 1080 for a decent prize.
According to come websites it is possible to connect an external GPU to a MacBook via Thunderbolt. I would like to know if somebody already tested this option and if there is some difficulties/problems one should be aware of.
In addition I saw that there are some website that already sell a chassis with with a GPU. The chassis is quite expensive... Is a chassis really necessary or the GPU could be connected directly to the MacBook without any additional component (Thunderbold cable excluded, obviously)?