PCIe Lanes, Slots and Bandwidth — Practical Enterprise Guide

How to size platforms for multi-GPU, NVMe, and high-speed networking without surprises.

PCIe Lanes, Slots and Bandwidth

Enterprise platforms fail quietly when lanes are oversubscribed. This guide explains lane budgeting and how COMATICS validates configurations.

What matters in practice

  • Lane budget from CPU(s)
  • Switches/retimers and slot wiring
  • GPU lane requirements (x16 typical)
  • NVMe lanes (x4 each)
  • NIC lane requirements (x8/x16)

COMATICS validation approach

We provide a compatibility matrix per product series and only quote validated combinations.

Quick checklist

1. Count GPUs ×16

2. Count NVMe ×4

3. Add NIC budget

4. Confirm board wiring and bifurcation