Parts/CPUs/IBM POWER9 22C
Why this part
Chosen for a link rather than for the core. POWER9 is the only host CPU that ever shipped with NVLink 2.0 on the die, giving cache-coherent access between processor and GPU memory at 150 GB/s per direction, against the roughly 16 GB/s a PCIe 3.0 x16 slot offered at the time. On Summit and Sierra that turned the GPU from a device you copy data to into something closer to a peer. It also locked those two machines to a supplier pair, IBM and NVIDIA, that no one else could substitute into, and when the DOE's next round went to AMD and to Intel, POWER had no path back.
Systems using this part
- Systems
- 8
- Rmax underneath
- 303.2 PFlop/s
- Units recorded
- 17,964
| System | Role | Country | Units | System Rmax | Supplied by | Rank |
|---|---|---|---|---|---|---|
| Marconi-100 2020-05 | CPU | Italy | - | 21.64 PFlop/s | IBM | #9 → |
| Pangea III 2019 | CPU | France | - | 17.86 PFlop/s | IBM | #61 → |
| Sierra 2018-06 | CPU | USA | 8,640 | 94.64 PFlop/s | IBM | #62 → |
| Summit 2018-06 | CPU | USA | 9,216 | 148.6 PFlop/s | IBM | #58 → |
| MareNostrum P9 CTE 2018-05 | CPU | Spain | 108 | 1.02 PFlop/s | IBM | #9 → |
| Lassen 2018 | CPU | USA | - | 18.20 PFlop/s | IBM | #10 → |
| Ansel (LLNL) 2018 | CPU | USA | - | 1.29 PFlop/s | IBM | #471 → |
| Bede | CPU | United Kingdom | - | - | IBM | - |
“Units recorded” sums only the edges where a public source states a quantity. It is a floor, not a total, and should never be read as installed base.