4 ms·4x PCIe 3.0 (~30Gbit) + USB 3.1 Gen 2 (10 Gbit) = the 40 GBit number quoted.by danudey 10y ago4x PCIe 3.0 (~30Gbit) + USB 3.1 Gen 2 (10 Gbit) = the 40 GBit number quoted.