Xeon Silver 4123 vs EPYC 7251
Aggregate performance score
EPYC 7251 outperforms Xeon Silver 4123 by a minimal 4% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7251 and Xeon Silver 4123 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 806 | 842 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.77 | no data |
| Market segment | Server | Server |
| Series | AMD EPYC | no data |
| Power efficiency | 7.41 | 8.17 |
| Architecture codename | Naples (2017−2018) | no data |
| Release date | 29 June 2017 (7 years ago) | 1 January 2018 (6 years ago) |
| Launch price (MSRP) | $574 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7251 and Xeon Silver 4123 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 | 8 (Octa-Core) | 8 (Octa-Core) |
| Threads | 16 | 16 |
| Base clock speed | 2.1 GHz | 3 GHz |
| Boost clock speed | 2.9 GHz | 3.2 GHz |
| Multiplier | 21 | no data |
| L1 cache | 96K (per core) | no data |
| L2 cache | 512K (per core) | no data |
| L3 cache | 32 MB (shared) | 11 MB |
| Chip lithography | 14 nm | 14 nm |
| Die size | 192 mm2 | no data |
| Number of transistors | 4,800 million | no data |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on EPYC 7251 and Xeon Silver 4123 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 | 2 (Multiprocessor) | no data |
| Socket | TR4 | FCLGA3647 |
| Power consumption (TDP) | 120 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7251 and Xeon Silver 4123. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | - |
| vPro | no data | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Turbo Boost Max 3.0 | no data | - |
Security technologies
EPYC 7251 and Xeon Silver 4123 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7251 and Xeon Silver 4123 are enumerated here.
| AMD-V | + | - |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7251 and Xeon Silver 4123. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Eight-channel | DDR4-2400 |
| Maximum memory size | 2 TiB | 512 GB |
| Max memory channels | 8 | 6 |
| Maximum memory bandwidth | 153.652 GB/s | no data |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by EPYC 7251 and Xeon Silver 4123.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 128 | 48 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 9.40 | 9.07 |
| Recency | 29 June 2017 | 1 January 2018 |
| Power consumption (TDP) | 120 Watt | 105 Watt |
EPYC 7251 has a 3.6% higher aggregate performance score.
Xeon Silver 4123, on the other hand, has an age advantage of 6 months, and 14.3% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between EPYC 7251 and Xeon Silver 4123.
Should you still have questions on choice between EPYC 7251 and Xeon Silver 4123, ask them in Comments section, and we shall answer.
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