Blackwell Ultra GB300 Ships
Narrative
Mid-cycle refresh. 50% more performance than GB200. 15 petaflops FP4 per GPU. 1.1 exaflops per rack. Drop-in compatible.
Reality
Performance gains verified. Compatibility working. Supply constrained at launch. Hyperscalers prioritized. Six-month lifespan before Rubin narrative began.
Implication
Validated mid-cycle refresh strategy. Maintained competitive pressure between major architectures. Accelerated depreciation cycles. AMD MI400 delay looked worse.