What is the difference between the PCIe lanes from the CPU and the ones from the motherboard? Is there a performance difference? - Quora
Guide to PCIe Lanes: How many do you need for your workload?
Opinion: Why Counting 'Platform' PCIe Lanes (and using it in Marketing) Is Absurd - The Intel Core i9-7980XE and Core i9-7960X CPU Review Part 1: Workstation
How Many PCIe Lanes Do You Really Need? - Boxx Blog