Why do PCIe 3.0 x8 devices (SSD7202, SSD7204) indicate not optimal slots in Mac Pro 2019？
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Q1: Why do PCIe 3.0 x8 devices (SSD7202, SSD7204) indicate not optimal slots in Mac Pro 2019？
A1：The product’s chip 8747/8749 is designed to be used as PCIe 3.0 x16, whereas the device (SSD7202, SSD7204) only uses PCIe 3.0 x8. The mismatched bandwidth between the chip and controller causes the Mac Pro 2019 to show a not optimal slot.