A6-6400K vs i9-7900X

VS

Aggregate performance score

Core i9-7900X
2017
10 cores / 20 threads, 140 Watt
13.25
+1295%
A6-6400K
2013
2 cores / 2 threads, 65 Watt
0.95

Core i9-7900X outperforms A6-6400K by a whopping 1295% based on our aggregate benchmark results.

Primary details

Comparing Core i9-7900X and A6-6400K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking5602503
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.90no data
Market segmentDesktop processorDesktop processor
SeriesCore i9 (Desktop)AMD A-Series (Desktop)
Power efficiency8.961.38
Architecture codenameSkylake (server) (2017−2018)Richland (2013−2014)
Release date26 June 2017 (7 years ago)1 June 2013 (11 years ago)
Launch price (MSRP)$999no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i9-7900X and A6-6400K 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 cores10 (Deca-Core)2 (Dual-core)
Threads202
Base clock speed3.3 GHz3.9 GHz
Boost clock speed4.5 GHz4.1 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier33no data
L1 cache64 KB (per core)96 KB
L2 cache1 MB (per core)1024 KB
L3 cache14 MB (shared)0 KB
Chip lithography14 nm32 nm
Die sizeno data246 mm2
Maximum core temperature95 °C70 °C
Maximum case temperature (TCase)72 °C70 °C
Number of transistorsno data1,178 million
64 bit support++
Windows 11 compatibility+-
Unlocked multiplier++

Compatibility

Information on Core i9-7900X and A6-6400K 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
SocketSocket R4FM2
Power consumption (TDP)140 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7900X and A6-6400K. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512MMX, SSE1-4a, AES, ABM, AVX, BMI1, AMD64, VT, EVP, Turbo Core 3.0
AES-NI++
FMA-FMA4
AVX++
PowerNow-+
PowerGating-+
VirusProtect-+
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX+-
Turbo Boost Max 3.0+no data

Security technologies

Core i9-7900X and A6-6400K technologies aimed at improving security, for example, by protecting against hacks.

EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7900X and A6-6400K are enumerated here.

AMD-V++
VT-d+no data
VT-x+no data
IOMMU 2.0-+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7900X and A6-6400K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR3-1866
Maximum memory size128 GBno data
Max memory channels42
Maximum memory bandwidth85.33 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AAMD Radeon HD 8470D
Number of pipelinesno data192
Enduro-+
Switchable graphics-+
UVD-+
VCE-+

Graphics interfaces

Available interfaces and connections of Core i9-7900X and A6-6400K integrated GPUs.

DisplayPort-+
HDMI-+

Graphics API support

APIs supported by Core i9-7900X and A6-6400K integrated GPUs, sometimes API versions are included.

DirectXno dataDirectX® 11

Peripherals

Specifications and connection of peripherals supported by Core i9-7900X and A6-6400K.

PCIe version3.02.0
PCI Express lanes44no 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.

i9-7900X 13.25
+1295%
A6-6400K 0.95

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.

i9-7900X 21046
+1299%
A6-6400K 1504

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.

i9-7900X 1444
+252%
A6-6400K 410

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.

i9-7900X 8876
+1441%
A6-6400K 576

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.

i9-7900X 7287
+138%
A6-6400K 3068

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.

i9-7900X 49738
+879%
A6-6400K 5079

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.

i9-7900X 12678
+378%
A6-6400K 2654

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.

i9-7900X 24
+1339%
A6-6400K 2

Cinebench 15 64-bit multi-core

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

i9-7900X 2148
+1342%
A6-6400K 149

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.

i9-7900X 193
+119%
A6-6400K 88

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.

i9-7900X 2.2
+165%
A6-6400K 0.83

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.

i9-7900X 12.1
+1160%
A6-6400K 1

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.  

i9-7900X 121
+980%
A6-6400K 11

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.  

i9-7900X 217
+281%
A6-6400K 57

Gaming performance

Pros & cons summary


Performance score 13.25 0.95
Recency 26 June 2017 1 June 2013
Physical cores 10 2
Threads 20 2
Chip lithography 14 nm 32 nm
Power consumption (TDP) 140 Watt 65 Watt

i9-7900X has a 1294.7% higher aggregate performance score, an age advantage of 4 years, 400% more physical cores and 900% more threads, and a 128.6% more advanced lithography process.

A6-6400K, on the other hand, has 115.4% lower power consumption.

The Core i9-7900X is our recommended choice as it beats the A6-6400K in performance tests.


Should you still have questions on choice between Core i9-7900X and A6-6400K, ask them in Comments section, and we shall answer.

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Intel Core i9-7900X
Core i9-7900X
AMD A6-6400K
A6-6400K

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