Xeon Platinum 8351N vs 6521P
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 95 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Power efficiency | 6.93 | no data |
| Designer | Intel | Intel |
| Manufacturer | no data | Intel |
| Architecture codename | no data | Ice Lake-SP (2021) |
| Release date | 1 January 2025 (less than a year ago) | 6 April 2021 (4 years ago) |
Detailed specifications
Xeon 6521P and Xeon Platinum 8351N basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 24 (Tetracosa-Core) | 36 |
| Threads | 48 | 72 |
| Base clock speed | 2.6 GHz | 2.4 GHz |
| Boost clock speed | 4.1 GHz | 3.5 GHz |
| L1 cache | no data | 64K (per core) |
| L2 cache | no data | 1 MB (per core) |
| L3 cache | 144 MB | 54 MB (shared) |
| Chip lithography | Intel 3 nm | 10 nm |
| Maximum core temperature | 82 °C | no data |
| Maximum case temperature (TCase) | no data | 76 °C |
| 64 bit support | - | + |
| Windows 11 compatibility | no data | + |
Compatibility
Information on Xeon 6521P and Xeon Platinum 8351N compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | no data | 1 |
| Socket | FCLGA4710 | FCLGA4189 |
| Power consumption (TDP) | 225 Watt | 225 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon 6521P and Xeon Platinum 8351N. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512, Intel® AMX | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | + | + |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | + | + |
| Deep Learning Boost | + | + |
Security technologies
Xeon 6521P and Xeon Platinum 8351N technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| SGX | + | Yes with Intel® SPS |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon 6521P and Xeon Platinum 8351N are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon 6521P and Xeon Platinum 8351N. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5(6400MT/s) | DDR4-2933 |
| Maximum memory size | 4 TB | 6 TB |
| Max memory channels | 8 | 8 |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Xeon 6521P and Xeon Platinum 8351N.
| PCIe version | 5.0 | 4.0 |
| PCI Express lanes | 136 | 64 |
Pros & cons summary
| Recency | 1 January 2025 | 6 April 2021 |
| Physical cores | 24 | 36 |
| Threads | 48 | 72 |
Xeon 6521P has an age advantage of 3 years.
Xeon Platinum 8351N, on the other hand, has 50% more physical cores and 50% more threads.
We couldn't decide between Intel Xeon 6521P and Intel Xeon Platinum 8351N. We've got no test results to judge.
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