AMD EPYC 7281 vs AMD EPYC 7251

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CPU comparison with benchmarks


AMD EPYC 7281 CPU1 vs CPU2 AMD EPYC 7251
AMD EPYC 7281 AMD EPYC 7251

CPU comparison

In this CPU comparison, we compare the AMD EPYC 7281 and the AMD EPYC 7251 and use benchmarks to check which processor is faster.

We compare the AMD EPYC 7281 16 core processor released in Q3/2017 with the AMD EPYC 7251 which has 8 CPU cores and was introduced in Q3/2017.
AMD EPYC (90) Family AMD EPYC (90)
AMD EPYC 7001 (12) CPU group AMD EPYC 7001 (12)
1 Generation 1
Naples (Zen) Architecture Naples (Zen)
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD EPYC 7281 is a 16 core processor with a clock frequency of 2.20 GHz (2.70 GHz). The processor can compute 32 threads at the same time. The AMD EPYC 7251 clocks with 2.10 GHz (2.90 GHz), has 8 CPU cores and can calculate 16 threads in parallel.

AMD EPYC 7281 Characteristic AMD EPYC 7251
16 Cores 8
32 Threads 16
normal Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? No
2.20 GHz Frequency 2.10 GHz
2.70 GHz Turbo Frequency (1 Core) 2.90 GHz
2.70 GHz Turbo Frequency (All Cores) 2.90 GHz

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

AMD EPYC 7281 Characteristic AMD EPYC 7251
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

no iGPU GPU no iGPU
GPU frequency --
-- GPU (Turbo) --
-- GPU Generation --
Technology
Max. displays
-- Compute units --
-- Shader --
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory --
-- DirectX Version --

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

no iGPU GPU no iGPU
No Codec h265 / HEVC (8 bit) No
No Codec h265 / HEVC (10 bit) No
No Codec h264 No
No Codec VP9 No
No Codec VP8 No
No Codec AV1 No
No Codec AVC No
No Codec VC-1 No
No Codec JPEG No

Memory & PCIe

Up to GB of memory in a maximum of 8 memory channels is supported by the AMD EPYC 7281, while the AMD EPYC 7251 supports a maximum of GB of memory with a maximum memory bandwidth of 153.6 GB/s enabled.

AMD EPYC 7281 Characteristic AMD EPYC 7251
DDR4-2666 Memory DDR4-2666
Max. Memory
8 (Octa Channel) Memory channels 8 (Octa Channel)
170.6 GB/s Max. Bandwidth 153.6 GB/s
Yes ECC Yes
-- L2 Cache --
32.00 MB L3 Cache 32.00 MB
3.0 PCIe version 3.0
128 PCIe lanes 128
126.1 GB/s PCIe Bandwidth 126.1 GB/s

Thermal Management

The AMD EPYC 7281 has a TDP of 170 W. The TDP of the AMD EPYC 7251 is 120 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD EPYC 7281 Characteristic AMD EPYC 7251
170 W TDP (PL1 / PBP) 120 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The AMD EPYC 7281 has 32.00 MB cache and is manufactured in 14 nm. The cache of AMD EPYC 7251 is at 32.00 MB. The processor is manufactured in 14 nm.

AMD EPYC 7281 Characteristic AMD EPYC 7251
14 nm Technology 14 nm
Chiplet Chip design Chiplet
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, AVX2, FMA3
SP3 Socket SP3
AMD-V, SVM Virtualization AMD-V, SVM
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q3/2017 Release date Q3/2017
625 $ Release price 450 $
show more data show more data


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.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
664 (85%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
783 (100%)

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.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
2098 (45%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
4634 (100%)

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.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
21988 (100%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
14936 (68%)

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.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
119 (93%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
128 (100%)

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.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
2033 (100%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
1093 (54%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
713 (100%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
0 (0%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
AMD EPYC 7281 AMD EPYC 7281
16C 32T @ 2.70 GHz
2136 (100%)
AMD EPYC 7251 AMD EPYC 7251
8C 16T @ 2.90 GHz
0 (0%)

Devices using this processor

AMD EPYC 7281 AMD EPYC 7251
Unknown Unknown

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