PCIExpress
PC
Intel3GIO PCI-SIG
PCIAGPPCI
Gen.1 Gen.6
1
x16 x8, x4, x2, x1

Gen 1.1 2 3 4 5 6.4 7
2.5 5 8 16 32 64 128GT/s
x16 512GB/s


GPU
M.2, USB4/Thunderbolt, SD Express

USB4 (20/40Gbps PCIe Gen 4 x2)
Thunderbolt 4 (32Gbps PCIe Gen 4 x2)
USB4V2 (120/40 / 64Gbps PCIe Gen 5 x2)
Thunderbolt 5 (120/40 / 64Gbps PCIe Gen 5 x2)
M.2
NVMe PCIExpress Gen 5 x4
OCuLink (PCIe Gen 4 x4 64Gbps)

Gen.4?

PCIe