Ryzen 5 8640U vs i5-8400

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Aggregate performance score

Core i5-8400
2017
6 cores / 6 threads, 65 Watt
5.81
Ryzen 5 8640U
2023
6 cores / 12 threads, 28 Watt
13.24
+128%

Ryzen 5 8640U outperforms Core i5-8400 by a whopping 128% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8400 and Ryzen 5 8640U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1128570
Place by popularity63not in top-100
Cost-effectiveness evaluation4.96no data
Market segmentDesktop processorLaptop
SeriesIntel Core i5no data
Power efficiency8.4644.78
Architecture codenameCoffee Lake-S (2017−2018)Hawk Point-U (Zen 4) (2023)
Release date5 October 2017 (7 years ago)6 December 2023 (1 year ago)
Launch price (MSRP)$182no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-8400 and Ryzen 5 8640U 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 cores6 (Hexa-Core)6 (Hexa-Core)
Threads612
Base clock speed2.8 GHz3.5 GHz
Boost clock speed4 GHz4.9 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier28no data
L1 cache64K (per core)64 KB (per core)
L2 cache256K (per core)1 MB (per core)
L3 cache9 MB (shared)16 MB (shared)
Chip lithography14 nm4 nm
Die size149 mm2178 mm2
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)72 °Cno data
Number of transistorsno data25,000 million
64 bit support++
Windows 11 compatibility+no data

Compatibility

Information on Core i5-8400 and Ryzen 5 8640U 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)1
SocketFCLGA1151FP8
Power consumption (TDP)65 Watt28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Ryzen 5 8640U. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology-no data
Idle States+no data
Thermal Monitoring+-
Precision Boost 2no data+

Security technologies

Core i5-8400 and Ryzen 5 8640U 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 i5-8400 and Ryzen 5 8640U 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 i5-8400 and Ryzen 5 8640U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR5
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth42.671 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel UHD Graphics 630AMD Radeon 760M ( - 2600 MHz)
Max video memory64 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.05 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-8400 and Ryzen 5 8640U integrated GPUs.

Number of displays supported3no data

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Ryzen 5 8640U 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

Graphics API support

APIs supported by Core i5-8400 and Ryzen 5 8640U integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Ryzen 5 8640U.

PCIe version3.04.0
PCI Express lanes1620

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.

i5-8400 5.81
Ryzen 5 8640U 13.24
+128%

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.

i5-8400 9234
Ryzen 5 8640U 21025
+128%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i5-8400 1373
Ryzen 5 8640U 2227
+62.2%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i5-8400 4811
Ryzen 5 8640U 8438
+75.4%

Gaming performance

Pros & cons summary


Performance score 5.81 13.24
Integrated graphics card 3.09 14.90
Recency 5 October 2017 6 December 2023
Threads 6 12
Chip lithography 14 nm 4 nm
Power consumption (TDP) 65 Watt 28 Watt

Ryzen 5 8640U has a 127.9% higher aggregate performance score, 382.2% faster integrated GPU, an age advantage of 6 years, 100% more threads, a 250% more advanced lithography process, and 132.1% lower power consumption.

The Ryzen 5 8640U is our recommended choice as it beats the Core i5-8400 in performance tests.

Note that Core i5-8400 is a desktop processor while Ryzen 5 8640U is a notebook one.


Should you still have questions on choice between Core i5-8400 and Ryzen 5 8640U, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i5-8400
Core i5-8400
AMD Ryzen 5 8640U
Ryzen 5 8640U

Similar processor comparisons

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

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