EPYC 7451 vs i7-6700K

VS

Aggregate performance score

Core i7-6700K
2015
4 cores / 8 threads, 91 Watt
5.63
EPYC 7451
2017
24 cores / 48 threads, 180 Watt
16.28
+189%

EPYC 7451 outperforms Core i7-6700K by a whopping 189% based on our aggregate benchmark results.

Primary details

Comparing Core i7-6700K and EPYC 7451 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1149411
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.191.79
Market segmentDesktop processorServer
SeriesIntel Core i7 (Desktop)AMD EPYC
Power efficiency5.868.56
Architecture codenameSkylake (2015−2016)Naples (2017−2018)
Release date1 September 2015 (9 years ago)20 June 2017 (7 years ago)
Launch price (MSRP)$339$2,400

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7451 has 50% better value for money than i7-6700K.

Detailed specifications

Core i7-6700K and EPYC 7451 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 cores4 (Quad-Core)24 (Tetracosa-Core)
Threads848
Base clock speed4 GHz2.3 GHz
Boost clock speed4.2 GHz2.3 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier4023
L1 cache256 KB2.25 MB
L2 cache1 MB12 MB
L3 cache8 MB (shared)64 MB (shared)
Chip lithography14 nm14 nm
Die size122 mm2213 mm2
Maximum case temperature (TCase)64 °Cno data
Number of transistors1750 Million19200 Million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier++

Compatibility

Information on Core i7-6700K and EPYC 7451 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 configuration1 (Uniprocessor)2 (Multiprocessor)
SocketFCLGA1151TR4
Power consumption (TDP)91 Watt180 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6700K and EPYC 7451. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX+-
Idle States+no data
Thermal Monitoring+-

Security technologies

Core i7-6700K and EPYC 7451 technologies aimed at improving security, for example, by protecting against hacks.

TXT-no data
EDB+no data
Secure Key+no data
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-6700K and EPYC 7451 are enumerated here.

AMD-V++
VT-d+no data
VT-x+no data
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6700K and EPYC 7451. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR4 Eight-channel
Maximum memory size64 GB2 TiB
Max memory channels28
Maximum memory bandwidth34.134 GB/s170.671 GB/s
ECC memory support-+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel HD Graphics 530no data
Max video memory64 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.15 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i7-6700K and EPYC 7451 integrated GPUs.

Number of displays supported3no data
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i7-6700K and EPYC 7451 integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hzno data
Max resolution over eDP4096x2304@60Hzno data
Max resolution over DisplayPort4096x2304@60Hzno data
Max resolution over VGAN/Ano data

Graphics API support

APIs supported by Core i7-6700K and EPYC 7451 integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i7-6700K and EPYC 7451.

PCIe version3.03.0
PCI Express lanes16128

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.

i7-6700K 5.63
EPYC 7451 16.28
+189%

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.

i7-6700K 8936
EPYC 7451 25863
+189%

Gaming performance

Pros & cons summary


Performance score 5.63 16.28
Recency 1 September 2015 20 June 2017
Physical cores 4 24
Threads 8 48
Power consumption (TDP) 91 Watt 180 Watt

i7-6700K has 97.8% lower power consumption.

EPYC 7451, on the other hand, has a 189.2% higher aggregate performance score, an age advantage of 1 year, and 500% more physical cores and 500% more threads.

The EPYC 7451 is our recommended choice as it beats the Core i7-6700K in performance tests.

Note that Core i7-6700K is a desktop processor while EPYC 7451 is a server/workstation one.


Should you still have questions on choice between Core i7-6700K and EPYC 7451, ask them in Comments section, and we shall answer.

Vote for your favorite

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Intel Core i7-6700K
Core i7-6700K
AMD EPYC 7451
EPYC 7451

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Community ratings

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Questions & comments

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