Kyber
NVIDIA's announced ~600 kW Rubin Ultra rack on 800 VDC: Kyber NVL144 holds 144 GPU packages (576 dies on NVIDIA's quad-die plan; 288 if SemiAnalysis's June 2026 two-die report holds) in one NVLink domain. NVIDIA targets H2 2027; SemiAnalysis reported a slip to 2028.
Also written as: NVL144
Current numbers
~600 kWRubin Ultra Kyber-class rack power: NVIDIA roadmap figure, announced and not shipping
132 kW → ~600 kWEvery step from GB200's 132 kW up to Kyber's ~600 kW roadmap voids evidence proved only at lower rack loads
132 kW HPE GB200 rack TDP → GB300 135 kW rack TDP / 155 kW peak / NVIDIA RA up to 142 kW full rack → VR200 188 kW Max Q / 228 kW Max P / 330 kW facility basis → ~600 kW Rubin Ultra / Kyber roadmapRack power from the HPE GB200 NVL72 (~132 kW) to the ~600 kW Rubin Ultra Kyber roadmap point