800G DAC Cables
800G twin-port OSFP passive DAC cables (2×400G NDR), finned-top on both ends, for NVIDIA Quantum-2 QM9700/QM9790 switch-to-switch links at 1 m and 2 m. Also here: the OSFP-to-2×400G and OSFP-to-4×200G breakouts that fan a switch port out to ConnectX-7 adapters. DGX H100/H200 front cages are flat-top; see the NVIDIA OSFP part-number crosswalk. Lifetime warranty, shipping from Knoxville, Tennessee.
Other speeds: 25G · 100G · 200G · 400G · All DAC cables
New to DAC? Read our DAC Cables Guide →
From the blog
Why engineers and teams are moving LLM inference and fine-tuning onto DGX Spark and GB10 systems: bigger models than one...
Does the CPU matter for GPU inference? Dell R7525 (EPYC) vs R740xd (Xeon) compared on PCIe, memory bandwidth and GPU...
When on-prem AI inference needs a data center switch, when a DAC or ring is enough, and what lossless RoCE...
Why engineers and teams are moving LLM inference and fine-tuning onto DGX Spark and GB10 systems: bigger models than one unit can hold, private data that never leaves the building, and a desk-side box that matches NVIDIA's production stack.
Does the CPU matter for GPU inference? Dell R7525 (EPYC) vs R740xd (Xeon) compared on PCIe, memory bandwidth and GPU count.
When on-prem AI inference needs a data center switch, when a DAC or ring is enough, and what lossless RoCE Ethernet requires.
Testimonials
Got to me in 2 days, looks as professional as CDW.