AMD Ryzen 9 7940HS vs AMD Ryzen 7 7840U

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CPU comparison with benchmarks


AMD Ryzen 9 7940HS CPU1 vs CPU2 AMD Ryzen 7 7840U
AMD Ryzen 9 7940HS AMD Ryzen 7 7840U

CPU comparison

AMD Ryzen 9 7940HS or AMD Ryzen 7 7840U - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The AMD Ryzen 9 7940HS has 8 cores with 16 threads and clocks with a maximum frequency of 5.20 GHz. Up to 256 GB of memory is supported in 2 memory channels. The AMD Ryzen 9 7940HS was released in Q1/2023.

The AMD Ryzen 7 7840U has 8 cores with 16 threads and clocks with a maximum frequency of 5.10 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The AMD Ryzen 7 7840U was released in Q2/2023.
AMD Ryzen 9 (35) Family AMD Ryzen 7 (68)
AMD Ryzen 7040 (21) CPU group AMD Ryzen 7040 (21)
6 Generation 6
Phoenix (Zen 4) Architecture Phoenix (Zen 4)
Mobile Segment Mobile
-- Predecessor --
AMD Ryzen 9 8945HS Successor AMD Ryzen 7 8840U

CPU Cores and Base Frequency

The AMD Ryzen 9 7940HS is a 8 core processor with a clock frequency of 4.00 GHz (5.20 GHz). The AMD Ryzen 7 7840U has 8 CPU cores with a clock frequency of 3.30 GHz (5.10 GHz).

AMD Ryzen 9 7940HS Characteristic AMD Ryzen 7 7840U
8 Cores 8
16 Threads 16
normal Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? No
4.00 GHz Frequency 3.30 GHz
5.20 GHz Turbo Frequency (1 Core) 5.10 GHz
-- Turbo Frequency (All Cores) --

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 9 7940HS Characteristic AMD Ryzen 7 7840U
AMD Ryzen AI AI hardware AMD Ryzen AI
AMD dedicated AI XDNA Technology AI specifications AMD dedicated AI XDNA Technology

Internal Graphics

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

AMD Radeon 780M GPU AMD Radeon 780M
0.80 GHz GPU frequency 0.80 GHz
2.80 GHz GPU (Turbo) 2.70 GHz
3 GPU Generation 3
4 nm Technology 4 nm
4 Max. displays 4
12 Compute units 12
768 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 780M 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

The AMD Ryzen 9 7940HS supports a maximum of 256 GB of memory in 2 memory channels. The AMD Ryzen 7 7840U can connect up to 256 GB of memory in 2 memory channels.

AMD Ryzen 9 7940HS 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
8.00 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 TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Ryzen 9 7940HS has a TDP of 54 W, that of the AMD Ryzen 7 7840U is 28 W.

AMD Ryzen 9 7940HS Characteristic AMD Ryzen 7 7840U
54 W TDP (PL1 / PBP) 28 W
-- TDP (PL2) --
-- TDP up 30 W
35 W TDP down 15 W
100 °C Tjunction max. 100 °C

Technical details

The AMD Ryzen 9 7940HS has a 24.00 MB cache, while the AMD Ryzen 7 7840U cache has a total of 24.00 MB.

AMD Ryzen 9 7940HS 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
Q1/2023 Release date Q2/2023
-- Release price --
show more data show more data


Rate these processors

Here you can rate the AMD Ryzen 9 7940HS to help other visitors make their purchasing decisions. The average rating is 3.8 stars (38 ratings). Rate now:
Here you can rate the AMD Ryzen 7 7840U to help other visitors make their purchasing decisions. The average rating is 4.8 stars (31 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks
AMD Ryzen 9 7940HS (100%)
AMD Ryzen 7 7840U (94%)
⌀ Multi core performance in 3 CPU benchmarks
AMD Ryzen 9 7940HS (100%)
AMD Ryzen 7 7840U (84%)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 5.20 GHz
1974 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
1850 (94%)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
11600 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
9612 (83%)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 5.20 GHz
2617 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 5.10 GHz
2446 (93%)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
12447 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
10726 (86%)

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 9 7940HS AMD Ryzen 9 7940HS
AMD Radeon 780M @ 2.80 GHz
4357 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
AMD Radeon 780M @ 2.70 GHz
4201 (96%)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
30995 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
25337 (82%)

Performance for Artificial Intelligence (AI) and Machine Learning (ML)

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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
10 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
10 (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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 5.20 GHz
0 (0%)
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 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
0 (0%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
13450 (100%)

CPU-Z Benchmark 17 (Single-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
AMD Ryzen 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
661 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
0 (0%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
AMD Ryzen 9 7940HS AMD Ryzen 9 7940HS
8C 16T @ 4.00 GHz
7423 (100%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
8C 16T @ 3.30 GHz
0 (0%)

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 9 7940HS AMD Ryzen 9 7940HS
4.00 GHz
0 (0%)
AMD Ryzen 7 7840U AMD Ryzen 7 7840U
13,450 CB R23 MC @ 30 W
448 (100%)

Devices using this processor

AMD Ryzen 9 7940HS AMD Ryzen 7 7840U
Unknown AOKZOE A1 Pro

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