Intel Core i7-7820X vs AMD EPYC 7451

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CPU comparison with benchmarks


Intel Core i7-7820X CPU1 vs CPU2 AMD EPYC 7451
Intel Core i7-7820X AMD EPYC 7451

CPU comparison

Intel Core i7-7820X 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 Intel Core i7-7820X has 8 cores with 16 threads and clocks with a maximum frequency of 4.50 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i7-7820X was released in Q2/2017.

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.
Intel Core i7 (293) Family AMD EPYC (111)
Intel Core i 7000X (9) CPU group AMD EPYC 7001 (12)
7 Generation 1
Skylake X Architecture Naples (Zen)
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i7-7820X has 8 CPU cores and can calculate 16 threads in parallel. The clock frequency of the Intel Core i7-7820X is 3.60 GHz (4.50 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).

Intel Core i7-7820X Characteristic AMD EPYC 7451
8 Cores 24
16 Threads 48
normal Core architecture normal
Yes Hyperthreading Yes
Yes Overclocking ? No
3.60 GHz Frequency 2.30 GHz
4.50 GHz Turbo Frequency (1 Core) 3.20 GHz
4.30 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.

Intel Core i7-7820X Characteristic AMD EPYC 7451
-- AI hardware --
-- AI specifications --

Internal Graphics

The Intel Core i7-7820X 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.

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

The Intel Core i7-7820X can use up to 128 GB of memory in 4 memory channels. The maximum memory bandwidth is 85.4 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.

Intel Core i7-7820X Characteristic AMD EPYC 7451
DDR4-2666 Memory DDR4-2666
128 GB Max. Memory
4 (Quad Channel) Memory channels 8 (Octa Channel)
85.4 GB/s Max. Bandwidth 170.6 GB/s
No ECC Yes
-- L2 Cache --
11.00 MB L3 Cache 64.00 MB
3.0 PCIe version 3.0
28 PCIe lanes 128
27.6 GB/s PCIe Bandwidth 126.1 GB/s

Thermal Management

The thermal design power (TDP for short) of the Intel Core i7-7820X is 140 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.

Intel Core i7-7820X Characteristic AMD EPYC 7451
140 W TDP (PL1 / PBP) 180 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i7-7820X is manufactured in 14 nm and has 11.00 MB cache. The AMD EPYC 7451 is manufactured in 14 nm and has a 64.00 MB cache.

Intel Core i7-7820X Characteristic AMD EPYC 7451
14 nm Technology 14 nm
Monolithic Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512 ISA extensions SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
LGA 2066 Socket SP3
VT-x, VT-x EPT, VT-d Virtualization AMD-V, SVM
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q2/2017 Release date Q3/2017
650 $ Release price 2400 $
show more data show more data


Rate these processors

Here you can rate the Intel Core i7-7820X to help other visitors make their purchasing decisions. The average rating is 3.0 stars (2 ratings). Rate now:
Here you can rate the AMD EPYC 7451 to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 3 CPU benchmarks
⌀ Multi core performance in 4 CPU benchmarks

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.50 GHz
1285 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
884 (69%)

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
8916 (61%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
14671 (100%)

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.50 GHz
498 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
317 (64%)

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
5155 (76%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
6768 (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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
17244 (84%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
20479 (100%)

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.50 GHz
197 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
141 (72%)

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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
1887 (58%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
3277 (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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.50 GHz
1513 (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.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
8123 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
0 (0%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 4.30 GHz
212 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
0 (0%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i7-7820X Intel Core i7-7820X
8C 16T @ 3.60 GHz
4398 (100%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.30 GHz
0 (0%)

Devices using this processor

Intel Core i7-7820X AMD EPYC 7451
Unknown Unknown

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