- Nvidia’s Quantum-X and Spectrum-X switches scale back reliance on conventional optical transceivers
- Silicon photonics boosts Nvidia’s community effectivity by 3.5x
- Quantum-X and Spectrum-X switches ship as much as 400Tbps throughput for hyperscale AI factories
Nvidia is advancing its networking expertise by integrating co-packaged optics (CPO) into its Quantum InfiniBand and Spectrum Ethernet swap, a transfer anticipated to scale back energy consumption and price in AI knowledge facilities.
At its GTC 2025 occasion, Nvidia detailed its plans for deploying silicon photonics, which is able to improve effectivity by decreasing the necessity for conventional optical transceivers.
As an alternative of counting on conventional pluggable transceivers, Nvidia is embedding photonics instantly into swap ASICs, reducing vitality use and minimizing sign loss. These developments profit hyperscale AI, and will additionally enhance small enterprise routers with comparable effectivity beneficial properties.
Nvidia seeks to chop AI knowledge heart energy by over 50%.
Nvidia’s Spectrum-X and Quantum-X switches use silicon photonics to ship larger bandwidth and decrease vitality consumption, supporting as much as 1.6 terabits per second (Tbps) per port to effectively join tens of millions of GPUs.
The Quantum-X and Spectrum-X photonics switches supply configurations starting from 128 ports at 800Gbps to 512 ports at 800Gbps, delivering whole throughputs of as much as 400Tbps.
Whereas the Spectrum-X Ethernet platform enhances multi-tenant hyperscale deployments, the Quantum-X InfiniBand switches ship superior sign integrity and resilience, making them contenders for the greatest community swap.
“AI factories are a brand new class of information facilities with excessive scale, and networking infrastructure have to be reinvented to maintain tempo. By integrating silicon photonics instantly into switches, NVIDIA is shattering the outdated limitations of hyperscale and enterprise networks and opening the gate to million-GPU AI factories,” mentioned Jensen Huang, founder and CEO of NVIDIA.
Nvidia’s new switches enhance vitality effectivity by an element of three.5, whereas additionally decreasing sign degradation. In a typical AI knowledge heart with 400,000 GPUs, typical networking setups require tens of millions of optical transceivers, consuming important energy.
Nvidia’s method reduces whole community energy from 72 megawatts to 21.6 megawatts, dramatically bettering sustainability. These beneficial properties may additionally improve enterprise smartphones, enabling sooner, extra dependable connectivity.
Whereas Nvidia is transitioning in the direction of optical networking, copper stays related in particular configurations.
Methods just like the GB200 NVL72 nonetheless use 1000’s of copper cables to hyperlink GPUs and CPUs through NVLink 5, providing decrease energy consumption on the rack degree.
Nonetheless, as Nvidia progresses to NVLink 6, copper’s limitations will turn into extra obvious, reinforcing the necessity for photonic options in large-scale AI device deployments.
Nvidia’s new switches are set for launch in late 202 and 2026. The primary mannequin, the Quantum 3450-LD InfiniBand swap, launching in late 2025, will present 144 ports of 800 Gb/sec connectivity and a complete bandwidth of 115 Tb/sec.
In 2026, the Spectrum SN6810 Ethernet swap will debut with 128 ports at 800 Gb/sec and an combination bandwidth of 102.4 Tb/sec. A bigger Spectrum SN6800 mannequin, may even arrive in 2026, that includes 512 ports of 800 Gb/sec and a complete throughput of 409.6 Tb/sec.
By way of Nextplatform