Home > CPU Comparison > Ryzen 5 8645HS or Ryzen 5 8640HS: what's better?

AMD Ryzen 5 8645HS vs Ryzen 5 8640HS

58 out of 100
AMD Ryzen 5 8645HS
VS
52 out of 100
AMD Ryzen 5 8640HS
AMD Ryzen 5 8645HS
AMD Ryzen 5 8640HS

We compared two 6-core laptop CPUs: the 4.3 GHz AMD Ryzen 5 8645HS against the 3.5 GHz Ryzen 5 8640HS. 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

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 8640HS and 8645HS
Advantages of AMD Ryzen 5 8645HS
  • 25% faster in a single-core Geekbench v6 test - 2668 vs 2127 points
  • 2% higher Turbo Boost frequency (5 GHz vs 4.9 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 5 8645HS
vs
Ryzen 5 8640HS

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
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 5 8645HS +43%
11216
Ryzen 5 8640HS
7865
File compression 1150 MB/sec 928.4 MB/sec
Clang compilation 84.9 Klines/sec 53.5 Klines/sec
HTML 5 Browser 211.2 pages/sec 169.7 pages/sec
PDF Renderer 282.9 Mpixels/sec 200 Mpixels/sec
Text processing 282.9 pages/sec 237.7 pages/sec
Background blur 58.6 images/sec 37.6 images/sec
Photo processing 83.3 images/sec 72.3 images/sec
Ray tracing 18.4 Mpixels/sec 11.2 Mpixels/sec
Sources: GeekBench [1] – 84 & 63 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Ryzen 5 8645HS +11%
21968
Ryzen 5 8640HS
19843
Integer math 70.5 GOps/sec 67.1 GOps/sec
Floating point math 43.6 GOps/sec 39.2 GOps/sec
Find prime numbers 73M Primes/sec 71M Primes/sec
Random string sorting 31.1M Strings/sec 27.2M Strings/sec
Data encryption 15.2 GBytes/sec 13.5 GBytes/sec
Data compression 257.4 MBytes/sec 225.6 MBytes/sec
Physics 1075 Frames/sec 1002 Frames/sec
Extended instructions 19.5B Matrices/sec 15.9B Matrices/sec
Sources: PassMark [3], [4] – 850 & 286 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 13.5 PPW 19.9 PPW
Geekbench 6 Multi / Watt 207.7 PPW 262.2 PPW
Passmark CPU Mark / Watt 406.8 PPW 661.4 PPW
Blender / Watt 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 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)
AMD Ryzen 5 8640HS
No benchmark results yet
Add

Specifications

Full technical specification of AMD Ryzen 5 8645HS and Ryzen 5 8640HS

General

Vendor Amd Amd
Released December 6, 2023 December 6, 2023
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Zen 4 (Hawk Point) Zen 4 (Hawk Point)
Integrated GPU Radeon 760M Radeon 760M
Rival Equivalent - Intel Core Ultra 7 155H -
AMD Ryzen CPU ranking (76th and 100th place)

CPU

Performance Cores
P-Cores 6 6
P-Threads 12 12
Base Frequency (P) 4.3 GHz 3.5 GHz
Turbo Boost Frequency (P) 5 GHz 4.9 GHz
Total
Total Cores 6 6
Total Threads 12 12
Bus Frequency 100 MHz 100 MHz
Multiplier 43x 35x
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) 20-30 W (configurable)
Socket FP8 FP8
Peak Temperature 100Β°C 100Β°C
Laptop processors ranking (121st and 181st place)

iGPU

Integrated Graphics Radeon 760M Radeon 760M
GPU Base Clock 800 MHz 800 MHz
GPU Boost Clock 2600 MHz 2600 MHz
Shading Units 512 512
TMUs 32 32
ROPs 16 16
Execution Units 8 8
TGP 15 W 15 W
iGPU FLOPS
Ryzen 5 8645HS
2.7 TFLOPS
Ryzen 5 8640HS
2.7 TFLOPS
See: Radeon 760M 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 No

Misc

Official Site AMD Ryzen 5 8645HS official page AMD Ryzen 5 8640HS official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
31 (54.4%)
26 (45.6%)
Total votes: 57

Competitors

1. AMD Ryzen 5 8640HS vs AMD Ryzen 7 8840HS
2. AMD Ryzen 5 8640HS vs AMD Ryzen 5 7640HS
3. AMD Ryzen 5 8640HS vs AMD Ryzen 7 7735HS
4. AMD Ryzen 5 8640HS vs AMD Ryzen 7 7840HS
5. AMD Ryzen 5 8640HS vs Intel Core i5 14500HX (1)
6. AMD Ryzen 5 8645HS vs Intel Core i5 13500H
7. AMD Ryzen 5 8645HS vs AMD Ryzen 5 7640HS
8. AMD Ryzen 5 8645HS vs AMD Ryzen 7 7435HS
9. AMD Ryzen 5 8645HS vs Intel Core Ultra 5 125H (1)
10. AMD Ryzen 5 8645HS vs AMD Ryzen 7 7840HS (3)
Compare other CPUs (460+)

Comments

So which CPU will you choose: AMD Ryzen 5 8640HS or Ryzen 5 8645HS?
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