JoakimZiegler
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New Mac Pro may not support PCI-E GPUs
Apple Silicon has a PCIe 4.0 controller. It's used for WLAN, Bluetooth, and of course Thunderbolt, which is PCIe over a serial bus. It's impossible to have Thunderbolt without a PCIe controller. The PCIe 4.0 controller showed up on Apple's list of M1 features in the presentation. The lack of eGPU support is more than anything a driver and OS support question than anything to do with hardware.
