Apple A9X vs AMD EPYC 7451

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CPU comparison with benchmarks


Apple A9X CPU1 vs CPU2 AMD EPYC 7451
Apple A9X AMD EPYC 7451

CPU comparison

Apple A9X or AMD EPYC 7451 - 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 Apple A9X has 2 cores with 2 threads and clocks with a maximum frequency of 2.26 GHz. Up to 4 GB of memory is supported in 2 memory channels. The Apple A9X was released in Q3/2015.

The AMD EPYC 7451 has 24 cores with 48 threads and clocks with a maximum frequency of 3.20 GHz. The CPU supports up to GB of memory in 8 memory channels. The AMD EPYC 7451 was released in Q3/2017.
Apple A series (22) Family AMD EPYC (129)
Apple A9/A9X (2) CPU group AMD EPYC 7001 (12)
9 Generation 1
A9 Architecture Naples (Zen)
Mobile Segment Desktop / Server
Apple A8X Predecessor --
Apple A10X Fusion Successor --

CPU Cores and Base Frequency

The Apple A9X has 2 CPU cores and can calculate 2 threads in parallel. The clock frequency of the Apple A9X is 2.26 GHz while the AMD EPYC 7451 has 24 CPU cores and 48 threads can calculate simultaneously. The clock frequency of the AMD EPYC 7451 is at 2.30 GHz (3.20 GHz).

Apple A9X Characteristic AMD EPYC 7451
2 Cores 24
2 Threads 48
normal Core architecture normal
No Hyperthreading Yes
No Overclocking ? No
2.26 GHz Frequency 2.30 GHz
-- Turbo Frequency (1 Core) 3.20 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.

Apple A9X Characteristic AMD EPYC 7451
-- AI hardware --
-- AI specifications --

Internal Graphics

The Apple A9X or AMD EPYC 7451 has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die.

Apple A9X GPU no iGPU
0.65 GHz GPU frequency --
-- GPU (Turbo) --
6 GPU Generation --
16 nm Technology
1 Max. displays
48 Compute units --
384 Shader --
No Hardware Raytracing No
No Frame Generation No
4 GB 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.

Apple A9X GPU no iGPU
No Codec h265 / HEVC (8 bit) No
No Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 No
No Codec VP9 No
Decode Codec VP8 No
No Codec AV1 No
Decode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

The Apple A9X can use up to 4 GB of memory in 2 memory channels. The maximum memory bandwidth is 51.2 GB/s. The AMD EPYC 7451 supports up to GB of memory in 8 memory channels and achieves a memory bandwidth of up to 170.6 GB/s.

Apple A9X Characteristic AMD EPYC 7451
LPDDR4-3200 Memory DDR4-2666
4 GB Max. Memory
2 (Dual Channel) Memory channels 8 (Octa Channel)
51.2 GB/s Max. Bandwidth 170.6 GB/s
No ECC Yes
3.00 MB L2 Cache --
4.00 MB L3 Cache 64.00 MB
-- PCIe version 3.0
-- PCIe lanes 128
-- PCIe Bandwidth 126.1 GB/s

Thermal Management

The thermal design power (TDP for short) of the Apple A9X is 8 W, while the AMD EPYC 7451 has a TDP of 180 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.

Apple A9X Characteristic AMD EPYC 7451
8 W TDP (PL1 / PBP) 180 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Apple A9X is manufactured in 16 nm and has 7.00 MB cache. The AMD EPYC 7451 is manufactured in 14 nm and has a 64.00 MB cache.

Apple A9X Characteristic AMD EPYC 7451
16 nm Technology 14 nm
Chiplet Chip design Chiplet
Armv8-A (64 bit) Instruction set (ISA) x86-64 (64 bit)
-- ISA extensions SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
-- Socket SP3
None Virtualization AMD-V, SVM
No AES-NI Yes
iOS Operating systems Windows 10, Linux
Q3/2015 Release date Q3/2017
-- Release price 2400 $
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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Apple A9X (74%)
AMD EPYC 7451 (100%)
⌀ Multi core performance in 2 CPU benchmarks
Apple A9X (10%)
AMD EPYC 7451 (100%)

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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
652 (74%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
884 (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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
1198 (8%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
14671 (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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
2501 (12%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
20479 (100%)

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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
763 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
1251 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
0 (0%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
317 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
6768 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Apple A9X Apple A9X
Apple A9X @ 0.65 GHz
499 (100%)
AMD EPYC 7451 AMD EPYC 7451
@ 0.00 GHz
0 (0%)

AnTuTu 8 Benchmark

The AnTuTu 8 Benchmark measures the performance of a SoC. AnTuTu benchmarks the CPU, GPU, Memory as well as the UX (User Experience) by simulating browser and app usage. AnTuTu can benchmark any ARM CPU that runs under Android or iOS. Devices may not be directly compareable if the benchmark has been performed under different operating systems.

In the AnTuTu 8 benchmark, the single-core performance of a processor is only slightly weighted. The evaluation consists of the multi-core performance of the processor, the speed of the RAM and the performance of the internal graphics.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
272103 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.30 GHz
0 (0%)

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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
141 (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.
Apple A9X Apple A9X
2C 2T @ 2.26 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
3277 (100%)

Devices using this processor

Apple A9X AMD EPYC 7451
Apple iPad Pro (1. Gen) Unknown

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