Home > CPU Comparison > Ryzen 7 7840HS or Ryzen 5 8645HS: what's better?

AMD Ryzen 7 7840HS vs Ryzen 5 8645HS

61 out of 100
AMD Ryzen 7 7840HS
VS
58 out of 100
AMD Ryzen 5 8645HS
AMD Ryzen 7 7840HS
AMD Ryzen 5 8645HS

We compared two laptop CPUs: the 3.8 GHz AMD Ryzen 7 7840HS with 8-cores against the 4.3 GHz Ryzen 5 8645HS with 6-cores. 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 (3)

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 8645HS and 7840HS
Advantages of AMD Ryzen 7 7840HS
  • More powerful Radeon 780M integrated graphics: 4.1 vs 2.7 TFLOPS
  • Has 2 more physical cores
  • 2% higher Turbo Boost frequency (5.1 GHz vs 5 GHz)
Advantages of AMD Ryzen 5 8645HS
  • Newer - released 11 months later

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 7 7840HS
vs
Ryzen 5 8645HS

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
Cinebench Scores (#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 7 7840HS +8%
12085
Ryzen 5 8645HS
11216
File compression 1120 MB/sec 1150 MB/sec
Clang compilation 102.5 Klines/sec 84.9 Klines/sec
HTML 5 Browser 217.2 pages/sec 211.2 pages/sec
PDF Renderer 350 Mpixels/sec 282.9 Mpixels/sec
Text processing 251.8 pages/sec 282.9 pages/sec
Background blur 59.4 images/sec 58.6 images/sec
Photo processing 87.6 images/sec 83.3 images/sec
Ray tracing 22.5 Mpixels/sec 18.4 Mpixels/sec
Sources: GeekBench [1], [2] – 753 & 84 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Ryzen 7 7840HS +29%
28292
Ryzen 5 8645HS
21968
Integer math 97.1 GOps/sec 70.5 GOps/sec
Floating point math 59 GOps/sec 43.6 GOps/sec
Find prime numbers 87M Primes/sec 73M Primes/sec
Random string sorting 40.4M Strings/sec 31.1M Strings/sec
Data encryption 20.3 GBytes/sec 15.2 GBytes/sec
Data compression 340.4 MBytes/sec 257.4 MBytes/sec
Physics 1362 Frames/sec 1075 Frames/sec
Extended instructions 25.4B Matrices/sec 19.5B Matrices/sec
Sources: PassMark [3], [4] – 4310 & 850 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Ryzen 7 7840HS +48%
218.59
Ryzen 5 8645HS
147.75

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 16.9 PPW 13.5 PPW
Geekbench 6 Multi / Watt 223.8 PPW 207.7 PPW
Passmark CPU Mark / Watt 523.9 PPW 406.8 PPW
Blender / Watt 4.05 PPW 2.74 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 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)
AMD Ryzen 5 8645HS
DateBenchmarkResult
πŸ“˜ 2026-04-04 (supergo0se)Geekbench 6 CPU2540 / 10607
πŸ“˜ 2025-08-04 (ZubairIbnZamir)Cinebench 202489 / 680
πŸ“˜ 2025-08-03 (ZubairIbnZamir)Geekbench 6 CPU2477 / 10355
πŸ“˜ 2025-01-13 (sauron269)Cinebench 2024104 / 676
πŸ“˜ 2024-12-28 (darseen)Cinebench 2024103 / 727
Add View all (5)

Specifications

Full technical specification of AMD Ryzen 7 7840HS and Ryzen 5 8645HS

General

Vendor Amd Amd
Released January 4, 2023 December 6, 2023
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Zen 4 (Phoenix) Zen 4 (Hawk Point)
Integrated GPU Radeon 780M Radeon 760M
Rival Equivalent - Intel Core i7 13620H - Intel Core Ultra 7 155H
Successor - AMD Ryzen 7 8840HS -
AMD Ryzen CPU ranking (62nd and 76th place)

CPU

Performance Cores
P-Cores 8 6
P-Threads 16 12
Base Frequency (P) 3.8 GHz 4.3 GHz
Turbo Boost Frequency (P) 5.1 GHz 5 GHz
Total
Total Cores 8 6
Total Threads 16 12
Bus Frequency 100 MHz 100 MHz
Multiplier 38x 43x
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 (93rd and 121st place)

iGPU

Integrated Graphics Radeon 780M Radeon 760M
GPU Base Clock 800 MHz 800 MHz
GPU Boost Clock 2700 MHz 2600 MHz
Shading Units 768 512
TMUs 48 32
ROPs 32 16
Execution Units 12 8
TGP 15 W 15 W
iGPU FLOPS
Ryzen 7 7840HS +52%
4.1 TFLOPS
Ryzen 5 8645HS
2.7 TFLOPS
More info: Radeon 760M compared to Radeon 780M

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 Yes No

Misc

Official Site AMD Ryzen 7 7840HS official page AMD Ryzen 5 8645HS official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20
Further details
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
55 (61.1%)
35 (38.9%)
Total votes: 90

Competitors

1. AMD Ryzen 7 7840HS vs AMD Ryzen 7 7735HS (4)
2. AMD Ryzen 7 7840HS vs AMD Ryzen 7 8845HS (12)
3. AMD Ryzen 7 7840HS vs Intel Core i7 13700H (16)
4. AMD Ryzen 7 7840HS vs AMD Ryzen 9 7940HS (9)
5. AMD Ryzen 7 7840HS vs Intel Core Ultra 7 155H (4)
6. AMD Ryzen 5 8645HS vs AMD Ryzen 7 7435HS
7. AMD Ryzen 5 8645HS vs Intel Core i5 13500H
8. AMD Ryzen 5 8645HS vs AMD Ryzen 7 8845HS (2)
9. AMD Ryzen 5 8645HS vs AMD Ryzen 5 7640HS
10. AMD Ryzen 5 8645HS vs Intel Core i7 13700H
Compare other CPUs (460+)

Comments

So which CPU will you choose: AMD Ryzen 5 8645HS or Ryzen 7 7840HS?
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Avatar
Jtv February 13, 2025 at 02:25 PM
The RYZEN 5 8645HS is far better compared to the price and features of the Ryzen 7 7840HS. Apart from the fact that, if you are a 3D designer, you can opt for the latter, but for gaming purposes, the first one with a better GPU can do wonders.
+15 Reply
Avatar
Delete October 27, 2025 at 06:41 AM
You're wrong, 7840 has a 780 graph, and 8645 has a 760 graph. 7840 is closer to 8845.
0 Reply
Avatar
Delroy July 14, 2024 at 08:47 AM
R5 8gen isn't that far behind, but if you really want extra cores then R7 prev gen is the way to go. But if power efficiency and solid performance is needed then the R5 8gen is perfect IMO.
+18 Reply
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