oclHashcat benchmark with Apple CPU + GPU

[epixoip]

For the price of that expansion chassis, you could build a complete 4-GPU server. And using that expander means your laptop is no longer mobile, you're tied to your desk. And you have to have all those GPUs sitting on your desk right beside you.

What the vast majority of us do is rack up a server somewhere and access it from your laptop over SSH anywhere in the world. That way you retain your mobility and you've isolated all that noise & heat away from you.