![]() The x4 PCI Express Controller connects to the right-side USB-C/Thunderbolt 3 ports (uses 4 PCIe lanes). The x8 PCI Express Controller connects to the left-side USB-C/Thunderbolt 3 ports (uses 4 PCIe lanes). The x16 PCI Express Controller connects to the Radeon Pro dGPU (uses 8 PCIe lanes). For example we used HWiNFO64 to check the arrangement of PCIe controllers and lane allocation on a Late 2016 15″ MacBook Pro (same as 2017 to 2019 model). Prior to setting up an external GPU, it’s a good idea to identify the routing of the PCIe connection over Thunderbolt 3 for your host Mac computer to learn about its capabilities. Therefore the ideal Boot Camp eGPU environment is an Intel iGPU-only Mac.Ģ018 15″ Macbook Pro + Radeon VII eGPU – Windows Graphics Settings Win10 1803+ provides manual graphics switching per app/game through Graphics Settings. In a Mac that has an AMD discrete graphics card and no functional iGPU, you would need Windor newer. AMD XConnect/Nvidia Optimus provides internal display loopback acceleration through the Intel iGPU with a Radeon/GeForce eGPU. In order for automatic graphics switching to work, the crucial prerequisite is the Intel integrated graphics card. ![]() Forum member Sky11 explained the three modes in Windows 10 (AMD XConnect, Nvidia Optimus, and Microsoft Hybrid Graphics) in this post. ![]() Let’s discuss graphics switching in Windows briefly. ![]() Razer Core X Chroma + RX Vega 64 LC + MacBook Pro + 49″ and 5K Monitors ![]()
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