AMD EPYC 7251 vs AMD RX-421ND
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CPU comparison with benchmarks
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| AMD EPYC 7251 | AMD RX-421ND | |
CPU comparisonAMD EPYC 7251 or AMD RX-421ND - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The AMD EPYC 7251 has 8 cores with 16 threads and clocks with a maximum frequency of 2.90 GHz. Up to GB of memory is supported in 8 memory channels. The AMD EPYC 7251 was released in Q3/2017. The AMD RX-421ND has 4 cores with 4 threads and clocks with a maximum frequency of 3.40 GHz. The CPU supports up to GB of memory in 2 memory channels. The AMD RX-421ND was released in Q4/2015. |
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| AMD EPYC (129) | Family | AMD R (6) |
| AMD EPYC 7001 (12) | CPU group | AMD RX 1st Gen. (6) |
| 1 | Generation | 1 |
| Naples (Zen) | Architecture | Merlin Falcon (Excavator) |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD EPYC 7251 has 8 CPU cores and can calculate 16 threads in parallel. The clock frequency of the AMD EPYC 7251 is 2.10 GHz (2.90 GHz) while the AMD RX-421ND has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the AMD RX-421ND is at 2.10 GHz (3.40 GHz). |
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| AMD EPYC 7251 | Characteristic | AMD RX-421ND |
| 8 | Cores | 4 |
| 16 | Threads | 4 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | No |
| No | Overclocking ? | No |
| 2.10 GHz | Frequency | 2.10 GHz |
| 2.90 GHz | Turbo Frequency (1 Core) | 3.40 GHz |
| 2.90 GHz | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe AMD EPYC 7251 can use up to GB of memory in 8 memory channels. The maximum memory bandwidth is 153.6 GB/s. The AMD RX-421ND supports up to GB of memory in 2 memory channels and achieves a memory bandwidth of up to 38.4 GB/s. |
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| AMD EPYC 7251 | Characteristic | AMD RX-421ND |
| DDR4-2666 | Memory | DDR4-2400, DDR3-2133 |
| Max. Memory | ||
| 8 (Octa Channel) | Memory channels | 2 (Dual Channel) |
| 153.6 GB/s | Max. Bandwidth | 38.4 GB/s |
| Yes | ECC | Yes |
| -- | L2 Cache | 2.00 MB |
| 32.00 MB | L3 Cache | -- |
| 3.0 | PCIe version | 3.0 |
| 128 | PCIe lanes | 12 |
| 126.1 GB/s | PCIe Bandwidth | 11.8 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD EPYC 7251 is 120 W, while the AMD RX-421ND has a TDP of 35 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD EPYC 7251 | Characteristic | AMD RX-421ND |
| 120 W | TDP (PL1 / PBP) | 35 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | 12 W |
| -- | Tjunction max. | 90 °C |
Technical detailsThe AMD EPYC 7251 is manufactured in 14 nm and has 32.00 MB cache. The AMD RX-421ND is manufactured in 28 nm and has a 2.00 MB cache. |
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| AMD EPYC 7251 | Characteristic | AMD RX-421ND |
| 14 nm | Technology | 28 nm |
| Chiplet | Chip design | Unknown |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4 |
| SP3 | Socket | FP4 |
| AMD-V, SVM | Virtualization | AMD-V, AMD-Vt |
| Yes | AES-NI | Yes |
| Windows 10, Linux | Operating systems | |
| Q3/2017 | Release date | Q4/2015 |
| 450 $ | Release price | -- |
| show more data | show more data | |
8C 16T @ 2.10 GHz (2.90 GHz) buy now on Amazon and save!
4C 4T @ 2.10 GHz (3.40 GHz) buy now on Amazon and save!
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Rate these processors
Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD EPYC 7251
8C 16T @ 2.90 GHz |
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AMD RX-421ND
4C 4T @ 3.40 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD EPYC 7251
8C 16T @ 2.90 GHz |
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AMD RX-421ND
4C 4T @ 2.10 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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AMD EPYC 7251
8C 16T @ 2.90 GHz |
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AMD RX-421ND
4C 4T @ 2.10 GHz |
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Cinebench R15 (Single-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD EPYC 7251
8C 16T @ 2.90 GHz |
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AMD RX-421ND
4C 4T @ 3.40 GHz |
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Cinebench R15 (Multi-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD EPYC 7251
8C 16T @ 2.90 GHz |
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AMD RX-421ND
4C 4T @ 2.10 GHz |
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Devices using this processor |
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| AMD EPYC 7251 | AMD RX-421ND |
| Unknown | Unknown |
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