Cray EX154n

Cray EX154n is the blade for Cray EX platforms that hosts GB200.

Each blade has two GB200 (1x Grace + 2x Blackwell) boards connected in an NVL4 configuration.¹ A Cray EX rack can only support 224 GPUs though, suggesting that the full capability of the rack (256 GPUs) cannot be reached due to power or cooling limitations.

It is expected to ship “by the end of 2025.”²

Footnotes

1. HPE crams 224 Nvidia Blackwell GPUs into latest Cray EX • The Register ↩

2. HPE expands direct liquid-cooled supercomputing solutions, introduces two AI systems for service providers and large enterprises | HPE ↩