PALO ALTO, Calif. — October 14, 2025 — Leads & Copy — Broadcom Inc. (NASDAQ:AVGO) has introduced Thor Ultra, the industry’s first 800G AI Ethernet Network Interface Card (NIC), designed to interconnect hundreds of thousands of XPUs for trillion-parameter AI workloads. By adopting the open Ultra Ethernet Consortium (UEC) specification, Thor Ultra allows customers to scale AI workloads with enhanced performance and efficiency within an open ecosystem.
Ram Velaga, senior vice president and general manager of the Core Switching Group at Broadcom, stated that Thor Ultra realizes the Ultra Ethernet Consortium’s vision for modernizing RDMA for large AI clusters. He also acknowledged the partnership with customers and the engineering team’s innovation.
Traditional RDMA lacks multipathing, out-of-order packet delivery, selective retransmit, and scalable congestion control. Thor Ultra introduces a suite of UEC-compliant, advanced RDMA innovations, including packet-level multipathing for load balancing, out-of-order packet delivery to XPU memory, selective retransmission for data transfer, and programmable congestion control algorithms.
Thor Ultra is available in standard PCIe CEM and OCP 3.0 form factors and features 200G or 100G PAM4 SerDes with support for long-reach passive copper, a low Bit Error Rate (BER) SerDes, a PCI Express Gen6 x16 host interface, line-rate encryption and decryption with PSP offload, secure boot with signed firmware and device attestation, a programmable congestion control pipeline, and Packet trimming and Congestion Signaling (CSIG) support with Tomahawk 5, Tomahawk 6, or any UEC compliant switch.
Broadcom Thor Ultra is now sampling.
Jon Piazza
Global Communications
press.relations@broadcom.com
Telephone: +1 310 498 5254
Source: Broadcom Inc.
