(Image credit: Tom's Hardware)
Astera Labs demonstrated its recently introduced Scorpio X-Series 320 Lane Smart Fabric Switch, which appears to be the industry’s largest open memory-semantic fabric switch, at Computex 2026 in Taipei. The PCIe 6.0 switch with 320 lanes can be used to build large multi-GPU scale-up clusters, large shared KV-cache memory pools, and disaggregate data center infrastructure using custom topologies.Image 1 of 3(Image credit: Tom's Hardware)The switch provides 320 PCIe 6.0 lanes and 20 Tbps of switching bandwidth, up from 144 lanes and 9 Tbps for previous-generation devices. Astera Labs says the increased number of lanes enables larger scale-up domains, enabling the connection of up to 80 accelerators using a single switch. By contrast, older 144-lane switches support up to 32 accelerators per switch. For clusters with more than 64 accelerators, the company says the new device reduces switch hops from as many as three to one and cuts switch count by a factor of four to six while still providing all-to-all connectivity akin to that provided by Nvidia’s NVL72 systems (albeit with lower bandwidth and higher latencies). The switch can support both standard and custom accelerators as long as they use standard PCIe connectivity.
