Tuolumne node architecture
Tuolumne is operated by DOE/NNSA/LLNL in United States. This profile covers Ranked system / partition.
Cluster interconnect: Slingshot-11. Topology: Not verified.
MI300A compute
- Node count
- 1144
- CPU
- AMD Zen 4 · 24 cores per MI300A
- CPUs per node
- 4
- Accelerator
- AMD MI300A
- Physical accelerators per node
- 4
- Host / unified memory
- 512 GB unified HBM3 per node
- Accelerator memory
- 128 GB shared CPU/GPU memory per APU
- Local accelerator links
- Infinity Fabric
- CPU-to-accelerator link
- Infinity Fabric
- Storage
- Not verified
Scope and uncertainty
1,144 compute nodes (1,100 batch + 44 debug); the published 1,152 total includes eight login nodes. CPU cores and GPU share memory within each MI300A; unified memory is not an additional separate RAM allocation.
Not verified means a detail has not been confirmed in this catalog. Diagrams are schematic; node indices are illustrative, not physical hostnames. Data checked 14 September 2026.
Sources
Browse all cluster architecture pages →
CLUSTER