Xeon Scalable Processors at TACC
The following table compares the Intel Xeon Scalable Processor compute nodes on both Stampede3 and Frontera at TACC, and is adapted from our companion material on Getting Started on Frontera:
| Stampede31 | Frontera2 | |
|---|---|---|
| Compute Node Type | Intel Xeon Platinum 8160 ("Skylake")3 |
Intel Xeon Platinum 8280 ("Cascade Lake") |
| Total Nodes | 1,060 | 8,368 |
| Cores/Node | 48 (24 cores/socket with 2 sockets) |
56 (28 cores/socket with 2 sockets) |
| Hardware Threads/core4 | 1 | 1 |
| Clock Rate5 | 2.1 GHz Max Turbo: 3.7 GHz |
2.7 GHz Max Turbo: 4.0 GHz |
| Memory | 192 GB DDR4-2666 | 192 GB DDR4-2933 |
| Memory Bandwidth | 119 GB/s | 131 GB/s |
| L1 Cache | 32 KB per core | 32 KB per core |
| L2 Cache | 1 MB per core | 1 MB per core |
| L3 Cache | 33 MB per socket | 38.5 MB per socket |
Local Storage (/tmp) |
144 GB partition on 200 GB SSD |
144 GB partition on 240 GB SSD |
1 Stampede3 User Guide: System Architecture
2 Frontera User Guide: System Architecture
3 The original Stampede2 had 1,736 SKX nodes, as well as 4,200 Intel Xeon Phi 7250 ("Knights Landing" or KNL) nodes. In 2022, 448 of the KNL nodes were replaced by 224 Intel Xeon Platinum 8380 ("Ice Lake" or ICX) nodes. The rest of the KNL nodes, plus a significant share of the SKX nodes, were removed in 2023 to prepare for Stampede3. See TACC's System Architecture for the current configuration of Stampede3, including its newer "Sapphire Rapids" nodes.
4 As of this writing, hyperthreading is not enabled on Stampede3 or Frontera. Previously, on Stampede2, the SKX nodes had 2 hardware threads/core, while the KNL nodes had 4 hardware threads/core. By executing lscpu or lstopo, you can get information about hardware thread numbering on Stampede3 or numbering on Frontera.
5 Max Turbo applies when all CPU power states are available and only 1 or 2 cores are active; the Turbo Boost rate declines if more cores are active and/or AVX instructions are used.