AMD Ryzen 5 7640U vs AMD Ryzen 7 7840U

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CPU comparison with benchmarks


AMD Ryzen 5 7640U CPU1 vs CPU2 AMD Ryzen 7 7840U
AMD Ryzen 5 7640U AMD Ryzen 7 7840U

CPU comparison

In this CPU comparison, we compare the AMD Ryzen 5 7640U and the AMD Ryzen 7 7840U 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 Ryzen 7 7840U which has 8 CPU cores and was introduced in Q2/2023.
AMD Ryzen 5 (91) Family AMD Ryzen 7 (74)
AMD Ryzen 7040 (21) CPU group AMD Ryzen 7040 (21)
6 Generation 6
Phoenix (Zen 4) Architecture Phoenix (Zen 4)
Notebook Segment Notebook
-- Predecessor --
AMD Ryzen 5 8640U Successor AMD Ryzen 7 8840U

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 Ryzen 7 7840U clocks with 3.30 GHz (5.10 GHz), has 8 CPU cores and can calculate 16 threads in parallel.

AMD Ryzen 5 7640U Characteristic AMD Ryzen 7 7840U
6 Cores 8
12 Threads 16
normal Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? No
3.50 GHz Frequency 3.30 GHz
4.90 GHz Turbo Frequency (1 Core) 5.10 GHz
-- Turbo Frequency (All Cores) --

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.

AMD Ryzen 5 7640U Characteristic AMD Ryzen 7 7840U
-- AI hardware AMD Ryzen™ AI
-- AI specifications AMD dedicated AI XDNA Technology
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

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 780M
0.80 GHz GPU frequency 0.80 GHz
2.60 GHz GPU (Turbo) 2.70 GHz
10 GPU Generation 3
4 nm Technology 4 nm
4 Max. displays 4
8 Compute units 12
512 Shader 768
Yes Hardware Raytracing Yes
AMD FSR Frame Generation AMD FSR
32 GB Max. GPU Memory 32 GB
12 DirectX Version 12

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 780M
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 Decode
Decode Codec VP8 Decode
Decode / Encode Codec AV1 Decode / Encode
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 Ryzen 7 7840U supports a maximum of 256 GB of memory with a maximum memory bandwidth of 120.0 GB/s enabled.

AMD Ryzen 5 7640U Characteristic AMD Ryzen 7 7840U
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 Memory DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500
256 GB Max. Memory 256 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 120.0 GB/s
Yes ECC Yes
6.00 MB L2 Cache 8.00 MB
16.00 MB L3 Cache 16.00 MB
4.0 PCIe version 4.0
20 PCIe lanes 20
39.4 GB/s PCIe Bandwidth 39.4 GB/s

Thermal Management

The AMD Ryzen 5 7640U has a TDP of 28 W. The TDP of the AMD Ryzen 7 7840U is 28 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Ryzen 5 7640U Characteristic AMD Ryzen 7 7840U
28 W TDP (PL1 / PBP) 28 W
-- TDP (PL2) --
30 W TDP up 30 W
15 W TDP down 15 W
100 °C Tjunction max. 100 °C

Technical details

The AMD Ryzen 5 7640U has 22.00 MB cache and is manufactured in 4 nm. The cache of AMD Ryzen 7 7840U is at 24.00 MB. The processor is manufactured in 4 nm.

AMD Ryzen 5 7640U Characteristic AMD Ryzen 7 7840U
4 nm Technology 4 nm
Monolithic Chip design Monolithic
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,FMA3, AVX2, AVX512
FP8 Socket FP8
AMD-V, SVM Virtualization AMD-V, SVM
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 10, Windows 11, Linux
Q3/2023 Release date Q2/2023
-- Release price --
show more data show more data


Rate these processors

Here you can rate the AMD Ryzen 5 7640U to help other visitors make their purchasing decisions. The average rating is 4.8 stars (18 ratings). Rate now:
Here you can rate the AMD Ryzen 7 7840U to help other visitors make their purchasing decisions. The average rating is 4.7 stars (71 ratings). Rate now:

Average performance in benchmarks

Single core performance in 3 CPU benchmarks
AMD Ryzen 5 7640U (95%)
AMD Ryzen 7 7840U (100%)
Multi core performance in 3 CPU benchmarks
AMD Ryzen 5 7640U (86%)
AMD Ryzen 7 7840U (100%)

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 (88%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
1755 (100%)

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 (79%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
13450 (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a partial load benchmark for modern computers, notebooks and smartphones. In the single-core test, only the fastest CPU core is measured. The test run simulates the performance in practice.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
2340 (96%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
2446 (100%)

Geekbench 6 (Multi-Core)

The practical Geekbench 6 multi-core benchmark tests the system's performance under partial load. The processor's maximum power consumption is far from being used up.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
9197 (86%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
10726 (100%)

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 Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
1850 (99%)

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 (92%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
9612 (100%)

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 (63%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
AMD Radeon 780M @ 2.70 GHz
4201 (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 (99%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
13,450 CB R23 MC @ 30 W
448 (100%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
0 (0%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
94 (100%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 4.90 GHz
0 (0%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
722 (100%)

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 Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
25337 (100%)

AI performance (NPU)

The performance values of the processor's AI unit. The isolated NPU performance is given here, the total AI performance (NPU+CPU+iGPU) can be higher.

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. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
AMD Ryzen 5 7640U AMD Ryzen 5 7640U
6C 12T @ 3.50 GHz
0 (0%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
10 (100%)

Devices using this processor

AMD Ryzen 5 7640U AMD Ryzen 7 7840U
Unknown AOKZOE A1 Pro

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