AMD Ryzen 5 7640U vs AMD A6-5400B

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CPU comparison with benchmarks


AMD Ryzen 5 7640U CPU1 vs CPU2 AMD A6-5400B
AMD Ryzen 5 7640U AMD A6-5400B

CPU comparison

In this CPU comparison, we compare the AMD Ryzen 5 7640U and the AMD A6-5400B and use benchmarks to check which processor is faster.

We compare the AMD Ryzen 5 7640U 6 core processor released in Q3/2023 with the AMD A6-5400B which has 2 CPU cores and was introduced in Q3/2012.
AMD Ryzen 5 (86) Family AMD A (112)
AMD Ryzen 7040 (21) CPU group AMD A6-5000 (3)
6 Generation 4
Phoenix (Zen 4) Architecture Kabini (Jaguar)
Mobile Segment Mobile
-- Predecessor --
AMD Ryzen 5 8640U Successor --

CPU Cores and Base Frequency

The AMD Ryzen 5 7640U is a 6 core processor with a clock frequency of 3.50 GHz (4.90 GHz). The processor can compute 12 threads at the same time. The AMD A6-5400B clocks with 3.60 GHz (3.80 GHz), has 2 CPU cores and can calculate 2 threads in parallel.

AMD Ryzen 5 7640U Characteristic AMD A6-5400B
6 Cores 2
12 Threads 2
normal Core architecture normal
Yes Hyperthreading No
No Overclocking ? No
3.50 GHz Frequency 3.60 GHz
4.90 GHz Turbo Frequency (1 Core) 3.80 GHz
-- Turbo Frequency (All Cores) 3.80 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.

AMD Ryzen 5 7640U Characteristic AMD A6-5400B
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

AMD Radeon 760M GPU AMD Radeon HD 7540D
0.80 GHz GPU frequency 0.64 GHz
2.60 GHz GPU (Turbo) --
10 GPU Generation 4
4 nm Technology 32 nm
4 Max. displays 2
8 Compute units 3
512 Shader 192
Yes Hardware Raytracing No
AMD FSR Frame Generation No
32 GB Max. GPU Memory 2 GB
12 DirectX Version 11

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.

AMD Radeon 760M GPU AMD Radeon HD 7540D
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 Decode
Decode Codec VP9 No
Decode Codec VP8 No
Decode / Encode Codec AV1 No
Decode Codec AVC Decode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

Up to 256 GB of memory in a maximum of 2 memory channels is supported by the AMD Ryzen 5 7640U, while the AMD A6-5400B supports a maximum of GB of memory with a maximum memory bandwidth of 29.9 GB/s enabled.

AMD Ryzen 5 7640U Characteristic AMD A6-5400B
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 Memory DDR3-1866
256 GB Max. Memory
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 29.9 GB/s
Yes ECC No
6.00 MB L2 Cache --
16.00 MB L3 Cache 1.00 MB
4.0 PCIe version --
20 PCIe lanes --
39.4 GB/s PCIe Bandwidth --

Thermal Management

The AMD Ryzen 5 7640U has a TDP of 28 W. The TDP of the AMD A6-5400B is 65 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Ryzen 5 7640U Characteristic AMD A6-5400B
28 W TDP (PL1 / PBP) 65 W
-- TDP (PL2) --
30 W TDP up --
15 W TDP down --
100 °C Tjunction max. --

Technical details

The AMD Ryzen 5 7640U has 22.00 MB cache and is manufactured in 4 nm. The cache of AMD A6-5400B is at 1.00 MB. The processor is manufactured in 28 nm.

AMD Ryzen 5 7640U Characteristic AMD A6-5400B
4 nm Technology 28 nm
Monolithic Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 ISA extensions SSE4a, SSE4.1, SSE4.2, AVX
FP8 Socket FM2
AMD-V, SVM Virtualization AMD-V
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems
Q3/2023 Release date Q3/2012
-- Release price --
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Rate these processors

Here you can rate the AMD Ryzen 5 7640U to help other visitors make their purchasing decisions. The average rating is 5.0 stars (6 ratings). Rate now:
Here you can rate the AMD A6-5400B 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 1 CPU benchmarks
AMD Ryzen 5 7640U (100%)
AMD A6-5400B (23%)
⌀ Multi core performance in 1 CPU benchmarks
AMD Ryzen 5 7640U (100%)
AMD A6-5400B (8%)

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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
1869 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
431 (23%)

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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
8853 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
689 (8%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
AMD Radeon 760M @ 2.60 GHz
2663 (100%)
AMD A6-5400B AMD A6-5400B
AMD Radeon HD 7540D @ 0.64 GHz
246 (9%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
1552 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
0 (0%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
10675 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
0 (0%)

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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
2340 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
9197 (100%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
0 (0%)

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.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
0 (0%)
AMD A6-5400B AMD A6-5400B
2C 2T @ 3.80 GHz
1906 (100%)

CPU performance per watt (efficiency)

Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
10,675 CB R23 MC @ 24 W
445 (100%)
AMD A6-5400B AMD A6-5400B
3.60 GHz
0 (0%)

Devices using this processor

AMD Ryzen 5 7640U AMD A6-5400B
Unknown Unknown

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