News — Interconnect
Layer 1 Decoded: Every Physical Form Factor in a Modern Rack
A field guide to the physical layer in 2026 — SFP through OSFP-XD, plus the PCIe-domain connectors (OCuLink, SlimSAS, MCIO, CopprLink) and the proprietary shells on top of both. Lane counts, speeds, modulation, and what actually plugs into what.
NVLink 6: The Switch That Turns a Rack Into One GPU
NVIDIA's NVLink 6 switch moves 3.6 TB/s to every GPU and 260 TB/s across a Vera Rubin NVL72 rack. Here is what it actually does, what it makes possible, and why it forces a rebuild of memory, power, cooling and cabling around it.