Meta Catalina

Catalina is Meta’s implementation of GB200 NVL72. A single “pod” consists of:¹

• 4x “Air Assisted Liquid Cooling” (liquid-air) heat exchanger racks
• 2 “IT racks,” each with
  • 18 compute trays, each with
    • 2x B200 GPUs
    • 2x Grace CPUs
    • 4x 400G ConnectX-7 NICs (for east-west)
    • 4x E1.S NVMe SSDs
    • 2x 200G ConnectX-7 NICs (for north-south)
    • 480 GB LPDDR5X host memory
  • 9 NVLink switches
  • 94 kW

It employs cross-rack cabling to create a single NVLink domain across the two “IT racks.” However, unlike the standard GB200 NVL72 with cross-rack cabling, Catalina employs 1:1 CPU to GPU.

Footnotes

1. https://wccftech.com/meta-catalina-pod-couples-nvidia-blackwell-gb200-nvl72-open-rack-v3-liquid-cooling/ ↩