Why 25G Nic

Backgroud

Choose 25g nic or 40g nic in server?

About PCIe, full-duplex communication

• Lanes and Links
  

• PCI Express link performance, each direction
  

Conclusion

For PCIe 3.0x8, 25G dual-ports NIC is better for PCIe bandwidth efficient.

Append

• PCIe Standard: PCI-SIG
• PCIe Roadmap