Now that macOS High Sierra 10.13 officially supports external graphics cards, we’ve developed a reliable procedure to set up and maintain a functional external GPU in Windows 10 via Boot Camp. In the past month, we’ve tried many different solutions by reading through. What we’ve found to work most reliably with a Late 2016 15″ MacBook Pro is a combination of, rEFInd, integrated.bat, and the right-side Thunderbolt 3 ports. The 13″ MacBook Pro is less involved to implement due to its lack of a discrete graphics card.
Our goals were to have an integrated GPU active for eGPU internal display mode and a reliable Windows bootup without error 12. Why so serious?
We have many successful users on Io Express with Avid 5.5.3 and if an individual is. I shut down both the Mac Pro and the IO Express.
Let’s discuss graphics switching in Windows briefly. Forum member explained the three modes in Windows 10 (Microsoft Hybrid graphics, AMD XConnect, and Nvidia Optimus) in. The crucial prerequisite is the Intel integrated graphics card for internal display acceleration with an external graphics card.
Without a functional iGPU, eGPU would only work with an external display. This explains the ease of eGPU implementation on iGPU-only hosts while dGPU + iGPU hosts such as the Thunderbolt 3 15″ MacBook Pro is harder to accomplish.
The worst-case scenario is when there’s no iGPU present either due to the host firmware or its CPU configuration. Prior to setting up an external GPU, it’s a good idea to identify the routing of the PCIe connection over Thunderbolt 3 for each host. We used to check the arrangement of PCIe controllers and lanes on this Late 2016 15″ MacBook Pro (same as Mid 2017 model). The x16 PCI Express Controller connects to the Radeon Pro dGPU. The x8 PCI Express Controller connects to the left-side USB-C/Thunderbolt 3 ports.
The x4 PCI Express Controller connects to the right-side USB-C/Thunderbolt 3 ports. It makes total sense to disable the entire line of communication to the dGPU so that we can free up resources for the USB-C/Thunderbolt 3 ports. The 13″ MacBook Pros have no direct Thunderbolt 3 to CPU connection. All PCIe lanes are routed through the platform controller hub (PCH). Apple’s states that the right-side Thunderbolt 3 ports on the Late 2016 13″ Touch Bar MacBook Pro have lower bandwidth than the left-side ports. This is due to the x2 PCI Express Root Port #9 – 9D18 to which these ports attach.
And now, it’s available for the Skype for Business on Mac client. If others share using VbSS, the Mac client will also use VbSS to view. If the Mac user wants to share their desktop, they will use RDP to share. This mode of sharing performs better, supports higher frame rates, and the setup time is faster than RDP (our original approach to sharing). In this release, we have specifically enabled viewing using VbSS. Project update: now available for mac.
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The left Thunderbolt 3 ports attach to x4 PCI Express Root Port #5 – 9D14. We captured the PCIe arrangement of the Thunderbolt 3 15″ MacBook Pro (shown on the left) and Thunderbolt 3 Touch Bar 13″ MacBook Pro (shown on the right) in and labeled them for reference.
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The name of the game is to allocate enough resources for the external graphics card to function in Windows 10 while not severely crippling other functionalities of the laptop. Through trial and error, we found the right-side Thunderbolt 3 ports under PCI Express x4 Controller – 1909 is the best way to connect an eGPU to the 15″ Thunderbolt 3 MacBook Pro. This is especially relevant when using an AMD Radeon eGPU in which both PCI Express Controller 1901 and 1905 need to be disabled to resolve error 12. The 13″ non-Touch Bar MacBook Pro would likely be able to negotiate enough resources for eGPU automagically.
If error 12 arises, simply disabling the connection to the iSight camera would resolve it. The 13″ Touch Bar iteration is slightly harder for eGPU implementation due to an extra Thunderbolt 3 controller and two more Thunderbolt 3 ports. It’s best to use the lower left Thunderbolt 3 port [closest to the TAB key] for eGPU connection on this model and to disable the PCI Express Root Port #9 – 9D18 that connects to the right Thunderbolt 3 ports to resolve error 12. Here are the recommended steps to set up an external GPU with Thunderbolt 3 MacBook Pros and the reasons behind them. If you’re familiar with using an external graphics card in Windows 10 via Boot Camp, proceed to the summarized setup procedure. • • • • • • Step 1: Install Windows, DDU & Restore Point There are setup guides to install Windows on an external hard drive so that the internal PCIe flash storage can be preserved solely for macOS partition.