"As shown in the Mac Pro's diagram, AMD made a custom Radeon Pro Vega II Duo for Apple that doesn't rely on any external PCIe power connectors. The graphics card pulls its power entirely from a standard PCIe x16 slot, which is capable of 75W, and Apple's new propiertary PCIe connector that can supply up to 475W. Both the Radeon Pro Vega II and Radeon Pro Vega II Duo feature four ThunderBolt 3 ports and one HDMI 2.0 port for connecting displays." https://www.tomshardware.com/news/amd-radeon-pro-vega-ii-7nm-gpus-apple-specs,39571.html does anyone have more knowledge on this? from what i'm understanding, this is apple's propiertary pcie slot, aka you not able to fit in a future Vega III or IV unless apple releases it, which was basically the same thing i had a problem with the trashcan, given how fast GPU tech advances, Vega II would only be justifiable for its cost for 2-3 year before Vega III or better yet, AMD Navi. i was half convinced to get the barebone base model and expand it down the line as i see fit, basically what i did with my mac pro 4.1, which i later upgraded the xeon cpu from 8 cores to 12 cores, and dropped a vega 56 in there. but it seems once again apple locked down everything and you have to source all add ons from them exclusively.