SU · Scalable Unit
A repeatable build block (a defined MW + GPU + cooling + fabric increment) that capacity ramps are composed of.
The standardized, repeatable design and procurement increment used to scale a cluster predictably.
Also written as: Scalable Unit
Current numbers
~600 kWRubin Ultra Kyber rack (NVL144) on 800 VDC; ~4.8 MW per 8-rack SU (an NVL1152 domain)
250 / 124 GB/sB300 Enhanced reference requirement per 32-node, 256-GPU SU; read/write, not a universal floor; Standard is 80/40 GB/s
576 GPUs / SUNVIDIA GB200 SuperPOD reference SU; separate from the 512-GPU teaching ledger