How to connect AI neural network processor to laptop? I have an average laptop. 

How can I connect specialized AI neural network processors (say, Intel Nvidia or Intel Nervana https://venturebeat.com/2018/05/23/intel-unveils-nervana-neural-net-l-1000-for-accelerated-ai-training/) to thelaptop.
Should I buy some external motherboard or even server unit with NN processors inside or is there available more lightweight solution like external HDD?
Check of deep learning box on the internet.
You will have to think hard in order to make a good and cost effective one.

But there are a few people who have made one of their own and shared their experiences.

Here are some medium articles:

Building your own Deep Learning dream machine

Building a 270* Teraflops Deep Learning Box for Under $10,000