Solved – PCIe slot requirement for 10G Ethernet card

which is the minimum pcie slot required for 10Gigabit PCIe 3.0 x4 Interface Ethernet card ?

PCIe Gen 3 bandwidth1 GB/s2 GB/s4 GB/s8 GB/s16 GB/s
PCIe Gen 4 bandwidth2 GB/s4 GB/s8 GB/s16 GB/s32 GB/s

solution: 10Gbit/s bandwidth means 1.25GB/s transfer rate. PCie 3.0 x2 bandwidth will be enough as PCIe Gen 3 can provide 1GB/s on single pcie lane.