TradingKey – Nvidia’s (NVDA) reduction of the HBM4 bandwidth specifications for its Rubin GPU introduces a new variable to the growth prospects of Micron Technology (MU). Nvidia’s current product page lists a single-GPU bandwidth of 19.2 TB/s, down approximately 12.7% from the previous 22 TB/s, while memory capacity remains at 288GB.

The bandwidth reduction does not decrease the GPU’s memory capacity, but it may alter competition among suppliers. Meanwhile, news that the Rubin Ultra may adopt 8-layer HBM affects per-system memory capacity.

For Micron Technology, the two adjustments affect product premium and sales volume respectively, requiring an evaluation of the profitability impact along different paths.