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P10957-B21 is the HPE ML350 Gen10 Intel Xeon-Platinum 8276 processor kit. The Platinum 8276 has 28 cores at 2.2 GHz and a 165 W rating, and it sits in the 8200 series of the 2nd generation Intel Xeon Scalable family, code-named Cascade Lake.
It has 38.5 MB of L3 cache and three UPI links at 10.4 GT/s. Six DDR4 channels run at 2933 MT/s with one DIMM per channel and at 2666 MT/s with two. The 8200 series adds Intel Turbo Boost, Hyper-Threading, AVX-512 with two 512-bit FMA units, 48 lanes of PCIe 3.0, node controller support, advanced RAS and VNNI/DL Boost. The socket is FCLGA3647.
The -B21 kit is the second processor in a two-processor configure-to-order ML350 Gen10, and it is also the kit for a second-processor field upgrade. The first processor comes from the matching P10957-L21 kit, and the two processors must be the same model. At 165 W it falls above the 85 W line, so it uses the Performance heatsink, and a two-processor server needs the Redundant Fan Cage Kit (874572-B21).
Neighbouring Platinum kits for the ML350 Gen10 include the 28-core 8276M (P10962-B21) and 8276L (P10967-B21) at the same 2.2 GHz and 165 W, the 24-core 8260 (P10954-B21) and the 28-core 8280 (P10958-B21) at 2.7 GHz and 205 W.
The spare processor is P11624-001, an Intel Xeon 8276 twenty eight-core 2.20 GHz Cascade Lake processor with 38.5MB cache, a 165 W thermal design power and socket FCLGA3647.
Other Platinum and Gold kits are in HPE server processors.
| Option number | P10957-B21 |
| Processor | Intel Xeon Platinum 8276 |
| Cores | 28 |
| Frequency | 2.2 GHz |
| Power | 165 W |
| L3 cache | 38.5 MB |
| UPI | 3 links at 10.4 GT/s |
| Memory | six-channel DDR4-2933 (1DPC), 2666 (2DPC) |
| PCIe | 48 lanes PCIe 3.0 |
| Socket | FCLGA3647 |
| Fits | HPE ProLiant ML350 Gen10 |
| First-processor kit | P10957-L21 |
| Heatsink | Performance (above 85 W) |
| Spare number | P11624-001 |