Anandtech say it has two M.2 x4 ports: http://www.anandtech.com/show/10518/amd-announces-radeon-pro-ssg-polaris-with-m2-ssds-onboard http://www.anandtech.com/s

Anandtech say it has two M.2 x4 ports: http://www.anandtech.com/show/10518/amd-announces-radeon-pro-ssg-polaris-with-m2-ssds-onboard http://www.anandtech.com/show/10518/amd-announces-radeon-pro... And on the back you can see the standard tiered screw holes for fitting different M.2 card lengths: https://twitter.com/FudzillaNews/status/757774661081899008 https://twitter.com/FudzillaNews/status/757774661081899008