Home > CPU Comparison > Ryzen 9 7940HS or Ryzen 7 7840HS: what's better?

AMD Ryzen 9 7940HS vs Ryzen 7 7840HS

60 out of 100
AMD Ryzen 9 7940HS
VS
61 out of 100
AMD Ryzen 7 7840HS
AMD Ryzen 9 7940HS
AMD Ryzen 7 7840HS

We compared two 8-core laptop CPUs: the 4.0 GHz AMD Ryzen 9 7940HS against the 3.8 GHz Ryzen 7 7840HS. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

  1. Review
  2. Differences
  3. Performance
  4. Specs
  5. Comments (9)

Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
Integrated Graphics
iGPU capabilities for gaming and 3D-intensive tasks
NanoReview Final Score
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
πŸ”Œ Usage Scenario:

Key Differences

What are the key differences between 7840HS and 7940HS
Advantages of AMD Ryzen 9 7940HS
  • 2% higher Turbo Boost frequency (5.2 GHz vs 5.1 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 9 7940HS
vs
Ryzen 7 7840HS

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
Cinebench Scores (174th and 182nd place)
Submit your benchmark results

GeekBench v6

The new version of this benchmark emulates common operations often used in real-world apps
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
Ryzen 9 7940HS
11631
Ryzen 7 7840HS +4%
12085
File compression 962.5 MB/sec 1120 MB/sec
Clang compilation 101.4 Klines/sec 102.5 Klines/sec
HTML 5 Browser 211.8 pages/sec 217.2 pages/sec
PDF Renderer 326.9 Mpixels/sec 350 Mpixels/sec
Text processing 260.3 pages/sec 251.8 pages/sec
Background blur 53.8 images/sec 59.4 images/sec
Photo processing 87.4 images/sec 87.6 images/sec
Ray tracing 22.5 Mpixels/sec 22.5 Mpixels/sec
Sources: GeekBench [1], [2] – 569 & 753 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Ryzen 9 7940HS +5%
29783
Ryzen 7 7840HS
28292
Integer math 102.1 GOps/sec 97.1 GOps/sec
Floating point math 62.3 GOps/sec 59 GOps/sec
Find prime numbers 90M Primes/sec 87M Primes/sec
Random string sorting 42.5M Strings/sec 40.4M Strings/sec
Data encryption 21.5 GBytes/sec 20.3 GBytes/sec
Data compression 360.4 MBytes/sec 340.4 MBytes/sec
Physics 1427 Frames/sec 1362 Frames/sec
Extended instructions 27.2B Matrices/sec 25.4B Matrices/sec
Sources: PassMark [3], [4] – 2780 & 4310 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Ryzen 9 7940HS +3%
225.69
Ryzen 7 7840HS
218.59

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 17.3 PPW 16.9 PPW
Geekbench 6 Multi / Watt 215.4 PPW 223.8 PPW
Passmark CPU Mark / Watt 551.5 PPW 523.9 PPW
Blender / Watt 4.18 PPW 4.05 PPW
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.

Recent User Tests

The latest benchmark tests that have been submitted by users
AMD Ryzen 9 7940HS
DateBenchmarkResult
πŸ“˜ 2025-11-09 (chrisg)Cinebench 2024105 / 873
πŸ“˜ 2025-08-19 (Phillywilly2000)Cinebench 2024102 / 906
πŸ“˜ 2025-07-14 (GlancingOcean)Cinebench 202470 / 677
πŸ“˜ 2025-05-13 (antoooooo)Cinebench 2024109 / 1009
πŸ“˜ 2025-03-08 (沧桷)Geekbench 6 CPU2614 / 12911
Add View all (9)
AMD Ryzen 7 7840HS
DateBenchmarkResult
πŸ“˜ 2025-12-08 (Hari)Cinebench 2024104 / 880
πŸ“˜ 2025-07-31 (Safi ullah)Cinebench 2024102 / 911
πŸ“˜ 2025-06-10 (Johns)Cinebench 2024105 / 929
πŸ“˜ 2025-04-05 (KaniastyGucio)Cinebench 2024100 / 910
πŸ“˜ 2024-12-09 (Anand)Cinebench 202472 / 719
Add View all (11)

Specifications

Full technical specification of AMD Ryzen 9 7940HS and Ryzen 7 7840HS

General

Vendor Amd Amd
Released January 4, 2023 January 4, 2023
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Zen 4 (Phoenix) Zen 4 (Phoenix)
Integrated GPU Radeon 780M Radeon 780M
Rival Equivalent - Intel Core i9 13900H - Intel Core i7 13620H
Successor - AMD Ryzen AI 9 HX 470 - AMD Ryzen 7 8840HS
AMD Ryzen CPU ranking (66th and 62nd place)

CPU

Performance Cores
P-Cores 8 8
P-Threads 16 16
Base Frequency (P) 4.0 GHz 3.8 GHz
Turbo Boost Frequency (P) 5.2 GHz 5.1 GHz
Total
Total Cores 8 8
Total Threads 16 16
Bus Frequency 100 MHz 100 MHz
Multiplier 40x 38x
L1 Cache 64K (per core) 64K (per core)
L2 Cache 1MB (per core) 1MB (per core)
L3 Cache 16MB (shared) 16MB (shared)
Unlocked Multiplier No No

Package

Transistors 25 billions 25 billions
Fabrication Process 4 nm 4 nm
TDP (PL1) 35-54 W (configurable) 35-54 W (configurable)
Socket FP8 FP8
Peak Temperature 100Β°C 100Β°C
Laptop processors ranking (106th and 93rd place)

iGPU

Integrated Graphics Radeon 780M Radeon 780M
GPU Base Clock 800 MHz 800 MHz
GPU Boost Clock 2800 MHz 2700 MHz
Shading Units 768 768
TMUs 48 48
ROPs 32 32
Execution Units 12 12
TGP 15 W 15 W
iGPU FLOPS
Ryzen 9 7940HS +5%
4.3 TFLOPS
Ryzen 7 7840HS
4.1 TFLOPS
See: Radeon 780M benchmarks

Memory Support

Memory Types - DDR5-5600
- LPDDR5x-7500		 - DDR5-5600
- LPDDR5x-7500
Max. Memory Size 256 GB 256 GB
Memory Channels 2 2
ECC Support No Yes

Misc

Official Site AMD Ryzen 9 7940HS official page AMD Ryzen 7 7840HS official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20
Further details
Notes on Ryzen 9 7940HS:
    - DDR5 memory is supported only on the FP7r2 socket, while FP7 and FP8 sockets support LPDDR5/x.
    - ECC support is available exclusively on the FP7r2 socket.
Notes on Ryzen 7 7840HS:
    - DDR5 memory is supported only on the FP7r2 socket, while FP7 and FP8 sockets support LPDDR5/x.
    - ECC support is available exclusively on the FP7r2 socket.

Cast your vote

Choose between two processors
252 (23.7%)
811 (76.3%)
Total votes: 1063

Competitors

1. AMD Ryzen 7 7840HS vs Intel Core i7 13700H (16)
2. AMD Ryzen 7 7840HS vs Intel Core Ultra 7 155H (4)
3. AMD Ryzen 7 7840HS vs AMD Ryzen 7 8845HS (12)
4. AMD Ryzen 7 7840HS vs AMD Ryzen 7 7735HS (4)
5. AMD Ryzen 7 7840HS vs Intel Core i7 13620H
6. AMD Ryzen 9 7940HS vs Intel Core i7 13700H (1)
7. AMD Ryzen 9 7940HS vs Intel Core Ultra 7 155H
8. AMD Ryzen 9 7940HS vs AMD Ryzen 9 8945HS (4)
9. AMD Ryzen 9 7940HS vs AMD Ryzen 7 8845HS
10. AMD Ryzen 9 7940HS vs Intel Core i9 13900H (1)
Compare other CPUs (460+)

Comments

So which CPU will you choose: AMD Ryzen 7 7840HS or Ryzen 9 7940HS?
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Marko April 24, 2024 at 03:10 PM
One thing nobody mentioned is that the 7940HS can be undervolted, while the 7840HS can't. This makes the 7940HS much more appealing for someone who cares about thermal management.
+36 Reply
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Miyuk June 13, 2024 at 04:03 AM
Can 7840hs be undervolted with 3rd part software?
+15 Reply
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Ame November 22, 2024 at 04:37 AM
Miyuk, Cannot, Ryzen 7s are locked
+2 Reply
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Vit November 6, 2023 at 09:27 AM
The two are pretty much identical (unlike the 7735HS, for example). In this case, there isn't a substantial difference between the Ryzen 9 and the Ryzen 7. It doesn't make sense to pay more for the 7940HS when the 7940HS itself is readily available.
+76 Reply
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Yeah August 29, 2023 at 03:27 PM
I suppose they go from one line. Then they test chips - more capable are marked Ryzen 9. Something like that.
+26 Reply
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VBe November 21, 2023 at 08:48 AM
Correct. Same way an i3 12100F is the same 'internals' as a 12900F just that it had defects in certain cores so they were disabled and sold as a 4core 8thread chip... they don't make 'different' CPU internals... they're all identical from the same 'family'.
+17 Reply
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Okjmni May 14, 2025 at 07:39 PM
Also, the R9 is loaded with more options like undervolting for thermal and power efficiency. The R7 cannot.
0 Reply
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David August 27, 2026 at 08:26 AM
Okjmni, R7 on the others hand cooler than R9 therefore it isn't necessary to be undervolted
0 Reply
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The Godfather May 20, 2023 at 06:56 AM
Until there is a 12 core Ryzen 9 in these APUs it's not worth paying more price than the Ryzen 7.
+131 Reply
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