After looking through the following page, I see where the confusion lays.
Computer buses - Main buses
Code:
Technology Rate (bit/s) Rate (byte/s)
PCI 32-bit/33 MHz 1,067 Mbit/s 133.33 MB/s
AGP 4x 8.533 Gbit/s 1.067 GB/s
PCI-X 133 8.533 Gbit/s 1.067 GB/s
PCI Express 1.0 (x1) 2 Gbit/s 250 MB/s
PCI Express 2.0 (x1) 4 Gbit/s 500 MB/s
PCI Express 3.0 (x1) 7.88 Gbit/s 0.99 GB/s
PCI Express 1.0 (x16) 32 Gbit/s 4 GB/s
PCI Express 2.0 (x16) 64 Gbit/s 8 GB/s
PCI Express 3.0 (x16) 126.03 Gbit/s 15.8 GB/s
The SATA Express article was referring to one lane transfer rate where as Kougar was referring to the transfer rate of all the lanes. PCIe 3.0 x1 is 8Gbits/s and PCIe 2.0 x16 is 8GBytes/s. Whiles the PCIe maybe referenced by Bytes the article was referencing in bits.
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