GB300
NVIDIA's Blackwell Ultra rack generation (Grace CPU plus Blackwell Ultra GPUs) in NVL72 form; the density step between GB200 and the Rubin era.
Current numbers
~$6.25M/system; ~$86.8k/installed GPUGB300 complete-system default: 72 GPUs (Appendix C)
135 kW TDP; 155 kW peak; up to 142 kW facility design basis; ~90% liquid / ~10% airper GB300 NVL72 rack (up to ~155 kW peak); CPUs/GPUs/NVSwitch liquid, optics/storage air
89 L/min at 35 °C supply (59 L/min at 25 °C; 177 L/min at 45 °C)Lenovo GB300 NVL72 required rack flow by supply temperature (W45-rated); the ladder’s 35 °C row