Scalable Unit · SU
The standardized, repeatable design and procurement increment used to scale a cluster predictably.
Current numbers
~600 kWRubin Ultra Kyber rack (NVL144) on 800 VDC; ~4.8 MW per 8-rack SU (an NVL1152 domain)
576 GPUs / SUNVIDIA GB200 SuperPOD scalable unit (8 systems); a 16-SU, 9,216-GPU cluster needs a three-tier switch BOM on the order of 1,000 boxes
250 / 125 GB/sper scalable unit read / write, B300 SuperPOD 'Enhanced' tier (8-SU: 2,000 / 1,000 GB/s); write ≥ ½ read rule