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What is the maximum number of PCIe buses (not PCIe lanes) supported by Ryzen 3960x CPU?

Question asked by serebr on Mar 18, 2020

There are some limited number of PCIe buses supported by PCIe standard, namely 255. But many BIOSes and CPUs have much smaller limit, usually 64. I need to connect around 220 PCIe buses over dozen of PCIe switches. Please let me know if that number (~220) of PCIe buses is supported by Ryzen 3960x CPU.