Home > CPU Comparison > Ryzen 7 8840U or Ryzen 5 8640U: what's better?

AMD Ryzen 7 8840U vs Ryzen 5 8640U

57 out of 100
AMD Ryzen 7 8840U
VS
56 out of 100
AMD Ryzen 5 8640U
AMD Ryzen 7 8840U
AMD Ryzen 5 8640U

We compared two laptop CPUs: the 3.3 GHz AMD Ryzen 7 8840U with 8-cores against the 3.5 GHz Ryzen 5 8640U 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

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.
🔌 Usage Scenario:

Key Differences

What are the key differences between 8640U and 8840U
Advantages of AMD Ryzen 7 8840U
  • More powerful Radeon 780M integrated graphics: 4.1 vs 2.7 TFLOPS
  • Has 2 more physical cores
  • 4% higher Turbo Boost frequency (5.1 GHz vs 4.9 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 7 8840U
vs
Ryzen 5 8640U

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 7 8840U +11%
11459
Ryzen 5 8640U
10308
File compression 983.8 MB/sec 1080 MB/sec
Clang compilation 88.1 Klines/sec 71 Klines/sec
HTML 5 Browser 235.1 pages/sec 226.5 pages/sec
PDF Renderer 345.7 Mpixels/sec 260.8 Mpixels/sec
Text processing 248.3 pages/sec 259.8 pages/sec
Background blur 48.3 images/sec 48.1 images/sec
Photo processing 103.3 images/sec 94.5 images/sec
Ray tracing 20 Mpixels/sec 15.5 Mpixels/sec
Sources: GeekBench [1], [2] – 10 & 6 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Ryzen 7 8840U +17%
23393
Ryzen 5 8640U
19989
Integer math 85.6 GOps/sec 66.4 GOps/sec
Floating point math 48.9 GOps/sec 39.6 GOps/sec
Find prime numbers 78M Primes/sec 68M Primes/sec
Random string sorting 32.4M Strings/sec 27.7M Strings/sec
Data encryption 16.2 GBytes/sec 13.7 GBytes/sec
Data compression 267.5 MBytes/sec 226.7 MBytes/sec
Physics 1178 Frames/sec 1015 Frames/sec
Extended instructions 18.7B Matrices/sec 16.4B Matrices/sec
Sources: PassMark [3], [4] – 583 & 41 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 24.2 PPW 20.4 PPW
Geekbench 6 Multi / Watt 382 PPW 343.6 PPW
Passmark CPU Mark / Watt 779.8 PPW 666.3 PPW
Blender / Watt 5.16 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 8840U
DateBenchmarkResult
📘 2024-04-19 (koro)Cinebench 202498 / 725
Add View all (1)
AMD Ryzen 5 8640U
No benchmark results yet
Add

Specifications

Full technical specification of AMD Ryzen 7 8840U and Ryzen 5 8640U

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 780M Radeon 760M
Rival Equivalent - Intel Core Ultra 7 165U - Intel Core Ultra 7 155U
Successor - AMD Ryzen 7 250 -
AMD Ryzen CPU ranking (81st and 86th place)

CPU

Performance Cores
P-Cores 8 6
P-Threads 16 12
Base Frequency (P) 3.3 GHz 3.5 GHz
Turbo Boost Frequency (P) 5.1 GHz 4.9 GHz
Total
Total Cores 8 6
Total Threads 16 12
Bus Frequency 100 MHz 100 MHz
Multiplier 33x 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) 15-30 W (configurable) 15-30 W (configurable)
Socket FP8 FP8
Peak Temperature 100°C 100°C
Laptop processors ranking (129th and 143rd 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 8840U +52%
4.1 TFLOPS
Ryzen 5 8640U
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 No No

Misc

Official Site AMD Ryzen 7 8840U official page AMD Ryzen 5 8640U official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
20 (76.9%)
6 (23.1%)
Total votes: 26

Competitors

1. AMD Ryzen 5 8640U vs Intel Core Ultra 5 125U
2. AMD Ryzen 5 8640U vs Intel Core i5 1335U
3. AMD Ryzen 5 8640U vs Intel Core Ultra 5 135U
4. AMD Ryzen 5 8640U vs AMD Ryzen 7 7735U
5. AMD Ryzen 5 8640U vs AMD Ryzen 5 7540U
6. AMD Ryzen 7 8840U vs Intel Core Ultra 7 155U (3)
7. AMD Ryzen 7 8840U vs Intel Core Ultra 7 165U
8. AMD Ryzen 7 8840U vs Intel Core Ultra 7 155H
9. AMD Ryzen 7 8840U vs Intel Core i7 1355U
10. AMD Ryzen 7 8840U vs AMD Ryzen 5 8540U
Compare other CPUs (460+)

Comments

So which CPU will you choose: AMD Ryzen 5 8640U or Ryzen 7 8840U?
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