Ryzen 9 5900X vs i5-8400

VS

Aggregate performance score

Core i5-8400
2017
6 cores / 6 threads, 65 Watt
5.81
Ryzen 9 5900X
2020
12 cores / 24 threads, 105 Watt
24.61
+324%

Ryzen 9 5900X outperforms Core i5-8400 by a whopping 324% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8400 and Ryzen 9 5900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1128206
Place by popularity63not in top-100
Cost-effectiveness evaluation4.9432.24
Market segmentDesktop processorDesktop processor
SeriesIntel Core i5AMD Ryzen 9
Power efficiency8.4522.17
Architecture codenameCoffee Lake-S (2017−2018)Vermeer (Zen3) (2020−2022)
Release date5 October 2017 (7 years ago)5 November 2020 (4 years ago)
Launch price (MSRP)$182$549

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 5900X has 553% better value for money than i5-8400.

Detailed specifications

Core i5-8400 and Ryzen 9 5900X 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)12 (Dodeca-Core)
Threads624
Base clock speed2.8 GHz3.7 GHz
Boost clock speed4 GHz4.8 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier2837
L1 cache64K (per core)64K (per core)
L2 cache256K (per core)512K (per core)
L3 cache9 MB (shared)64 MB
Chip lithography14 nm7 nm, 12 nm
Die size149 mm22x 74 mm2(CCD) + 125 mm2 (IOD)
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °C95 °C
Number of transistorsno data0 Million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier-+

Compatibility

Information on Core i5-8400 and Ryzen 9 5900X 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
SocketFCLGA1151AM4
Power consumption (TDP)65 Watt105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Ryzen 9 5900X. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX286x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2
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 9 5900X 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 9 5900X 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 9 5900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR4-3200
Maximum memory size128 GB128 GB
Max memory channels22
Maximum memory bandwidth42.671 GB/s51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel UHD Graphics 630-
Max video memory64 GB-
Quick Sync Video+-
Clear Video+-
Clear Video HD+-
Graphics max frequency1.05 GHz-
InTru 3D+-

Graphics interfaces

Available interfaces and connections of Core i5-8400 and Ryzen 9 5900X integrated GPUs.

Number of displays supported3-

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Ryzen 9 5900X integrated GPUs, including resolutions over different interfaces.

4K resolution support+-
Max resolution over HDMI 1.44096x2304@24Hz-
Max resolution over eDP4096x2304@60Hz-
Max resolution over DisplayPort4096x2304@60Hz-

Graphics API support

APIs supported by Core i5-8400 and Ryzen 9 5900X integrated GPUs, sometimes API versions are included.

DirectX12-
OpenGL4.5-

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Ryzen 9 5900X.

PCIe version3.04.0
PCI Express lanes16no data

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 9 5900X 24.61
+324%

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 9235
Ryzen 9 5900X 39097
+323%

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 9 5900X 2207
+60.7%

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 4810
Ryzen 9 5900X 11939
+148%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

i5-8400 6364
Ryzen 9 5900X 6828
+7.3%

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

i5-8400 30790
Ryzen 9 5900X 52076
+69.1%

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

i5-8400 9474
Ryzen 9 5900X 16438
+73.5%

Cinebench 11.5 64-bit multi-core

Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.

i5-8400 11
Ryzen 9 5900X 42
+280%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i5-8400 941
Ryzen 9 5900X 2695
+186%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i5-8400 170
Ryzen 9 5900X 250
+47.5%

Cinebench 11.5 64-bit single-core

Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.

i5-8400 1.9
Ryzen 9 5900X 3.14
+65.3%

TrueCrypt AES

TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.

i5-8400 5
Ryzen 9 5900X 21.2
+324%

WinRAR 4.0

WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.

i5-8400 5173
Ryzen 9 5900X 13361
+158%

x264 encoding pass 2

x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.  

i5-8400 61
Ryzen 9 5900X 191
+211%

x264 encoding pass 1

x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.  

i5-8400 224
Ryzen 9 5900X 335
+49.7%

Gaming performance

Pros & cons summary


Performance score 5.81 24.61
Recency 5 October 2017 5 November 2020
Physical cores 6 12
Threads 6 24
Chip lithography 14 nm 7 nm
Power consumption (TDP) 65 Watt 105 Watt

i5-8400 has 61.5% lower power consumption.

Ryzen 9 5900X, on the other hand, has a 323.6% higher aggregate performance score, an age advantage of 3 years, 100% more physical cores and 300% more threads, and a 100% more advanced lithography process.

The Ryzen 9 5900X is our recommended choice as it beats the Core i5-8400 in performance tests.


Should you still have questions on choice between Core i5-8400 and Ryzen 9 5900X, ask them in Comments section, and we shall answer.

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Intel Core i5-8400
Core i5-8400
AMD Ryzen 9 5900X
Ryzen 9 5900X

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Community ratings

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