Does SLI make sense? To answer this question, we conduct an experiment with Zotac GeForce GTX 1070 Mini Graphic Cards. In our short review we'll check out the pros and cons of an SLI configuration and compare the performance to those of single GPU systems.
https://www.notebookcheck.net/Zotac-GeForce-GTX-1070-Mini-Graphics-Card-SLI-Configuration.240954.0.html