Cray EX154n is the blade for Cray EX platforms that hosts GB200.
Each blade has one GB200 (2x Grace + 4x Blackwell) boards connected in an NVL4 configuration.1
Here is a photo of one I took at SC24:
The placard on the node display said the following:
Accelerated compute blade for Machine Learning and Sovereign Al
- 100% liquid cooled 1U chassis blade
- Featuring one NVIDIA® GB200 NVL4 Superchip
- Two NVIDIA Grace processors with 240 GB memory per processor
- Four NVDIA Blackwell GPUs with 192GB HBM3e memory per GPU
- Supports up to four HPE Slingshot injection ports per blade
- Supports one local NVMe SSD per blade
A Cray EX rack can only support 224 GPUs (56 blades) 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