L'offensive OCP de Supermicro : racks ORv3 48 V, CDU 250 kW et switch CPO 102,4 Tbps redessinent les nomenclatures des datacenters IA

Reported by StorageReview SSD/NVMe/存储评测与行业新闻 on 2026-10-14. Summarized and analyzed by XAIPART Editorial.

What happened

Supermicro announced an expanded line of Open Compute Project (OCP) Accepted systems, racks, and rear door heat exchangers (RDHx), delivered through its Data Center Building Block Solutions (DCBBS) program and shown at booth B4 at the OCP Global Summit in San Jose through October 15.^S1 The common element is the rack: the 21-inch ORv3 and the wider ORW both replace per-server power supplies and cabling with a centralized 48V DC busbar, which frees the space a conventional server spends on redundant power supplies for compute and cold plates.^S1

The ORv3 rack series comes in 44OU and 48OU heights with integrated busbars, a certified static load of 5,000 lb (2,268 kg), and a liquid-cooling-ready mechanical design that now includes MGX 1.2 (Gen 3) racks.^S1 Two propylene glycol coolants cover the technology cooling loop: DLC-1 for standard liquid-cooled racks and an ultra-low-conductivity DLC-2 fluid for specialty cold plates.^S1 Both align with the OCP PG25 base specification so racks, in-rack CDUs, RDHx units, and cold plates run as a single cooling stack.^S1

Residual heat is handled at the rack by a 4U in-rack coolant distribution unit (CDU) rated for up to 250 kW on 45°C warm water, a smaller sibling to the 1.8 MW in-row CDUs Supermicro ships with its Vera Rubin NVL72 racks.^S1 Six rear door heat exchangers span 10 kW to 120 kW in AC and DC versions; DC variants are fed from the busbar, carry N+1 redundant fans, and include anti-condensation control.^S1 Chiller doors cover the ORv3 rack at 20 kW to 100 kW and the ORW rack at 60 kW, managed over Redfish, SNMP, a web UI, and Modbus.^S1 Supermicro has not published a density figure for a fully loaded ORv3 rack under that combination, so how far an older facility can go remains a site-by-site calculation.^S1

On compute, the 2OU NVIDIA HGX B300 node places eight liquid-cooled GPUs in the 21-inch ORv3 envelope for up to 18 nodes and 144 GPUs per rack.^S1 The 1OU FlexTwin packs two Intel Xeon 6 or AMD EPYC nodes into a single OU for HPC, and a 2OU four-node design reaches up to 45,696 Arm AGI CPUs per rack, targeted at always-on agentic AI.^S1 The AMD Helios platform arrives as an ORW rack for inference, frontier-model training, fine-tuning, and sovereign AI.^S1

The networking line sits on the same busbar and coolant loop. A 2OU co-packaged optics (CPO) switch built on Broadcom's Tomahawk 6 delivers 102.4 Tbps across 128 800G ports, accepts 40 to 60 VDC from the ORv3 busbar, connects to the rack loop through blind-mate QD08 couplings, and runs Supermicro Enterprise Advanced SONiC.^S1 DCBBS also carries NVIDIA Spectrum-X Ethernet Photonics, a co-packaged Ethernet switch built on the 102.4 Tb/s Spectrum-6 ASIC with 200 Gb/s SerDes, which is in production now; NVIDIA cites 5x better power efficiency, 10x greater MTBI, 5x longer uptime for AI applications, and 1.3x faster time to deployment versus pluggable-transceiver designs, figures the source notes are vendor results that it did not audit.^S1 SuperCloud Composer monitors and manages every DCBBS component, with hardware attestation and post-quantum cryptography algorithms listed for compliance with OCP security standards, and Supermicro says the OCP portfolio is available now.^S1

Corrections: none at publication. This brief will be updated with a timestamp if the source corrects its report.