400G DAC Cables
400G passive DAC cables in three form factors: QSFP-DD, coded for Cisco, Arista and NVIDIA/Mellanox Spectrum; QSFP112, including the NJAAKK-N911 and LMTQF022-SD-R stacking cables for DGX Spark, plus the 2-pack and 3-node ring kit; and 400G breakouts, QSFP-DD to 2×200G and 800G OSFP to 2×400G. 0.5 m to 3 m, lifetime warranty, shipping from Knoxville, Tennessee.
Other speeds: 25G · 100G · 200G · 800G · All DAC cables
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From the blog
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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.
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