Home > CPU Comparison > Ryzen 5 8640U or Ryzen 5 6600U: what's better?

AMD Ryzen 5 8640U vs Ryzen 5 6600U

56 out of 100
AMD Ryzen 5 8640U
VS
45 out of 100
AMD Ryzen 5 6600U
AMD Ryzen 5 8640U
AMD Ryzen 5 6600U

We compared two 6-core laptop CPUs: the 3.5 GHz AMD Ryzen 5 8640U against the 2.9 GHz Ryzen 5 6600U. 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.
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Key Differences

What are the key differences between 6600U and 8640U
Advantages of AMD Ryzen 5 8640U
  • Supports up to 256 GB DDR5-5600 RAM
  • More powerful Radeon 760M integrated graphics: 2.7 vs 1.5 TFLOPS
  • Newer - released 2 years later
  • More modern manufacturing process – 4 versus 6 nanometers
  • 29% faster in a single-core Geekbench v6 test - 2519 vs 1947 points
  • 9% higher Turbo Boost frequency (4.9 GHz vs 4.5 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 5 8640U
vs
Ryzen 5 6600U

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)
Ryzen 5 8640U +29%
2519
Ryzen 5 6600U
1947
Geekbench 6 (Multi-Core)
Ryzen 5 8640U +43%
10308
Ryzen 5 6600U
7212
File compression 1080 MB/sec 837.1 MB/sec
Clang compilation 71 Klines/sec 52.4 Klines/sec
HTML 5 Browser 226.5 pages/sec 169.3 pages/sec
PDF Renderer 260.8 Mpixels/sec 219.6 Mpixels/sec
Text processing 259.8 pages/sec 198.7 pages/sec
Background blur 48.1 images/sec 33.6 images/sec
Photo processing 94.5 images/sec 73.2 images/sec
Ray tracing 15.5 Mpixels/sec 12.9 Mpixels/sec
Sources: GeekBench [1], [2] – 6 & 122 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Ryzen 5 8640U +12%
3459
Ryzen 5 6600U
3089
Passmark CPU (Multi-Core)
Ryzen 5 8640U +18%
19989
Ryzen 5 6600U
16884
Integer math 66.4 GOps/sec 60.4 GOps/sec
Floating point math 39.6 GOps/sec 33.5 GOps/sec
Find prime numbers 68M Primes/sec 51M Primes/sec
Random string sorting 27.7M Strings/sec 21.2M Strings/sec
Data encryption 13.7 GBytes/sec 12.7 GBytes/sec
Data compression 226.7 MBytes/sec 200.3 MBytes/sec
Physics 1015 Frames/sec 821 Frames/sec
Extended instructions 16.4B Matrices/sec 13.3B Matrices/sec
Sources: PassMark [3], [4] – 41 & 91 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 20.4 PPW 19 PPW
Geekbench 6 Multi / Watt 343.6 PPW 257.6 PPW
Passmark CPU Mark / Watt 666.3 PPW 603 PPW
Blender / Watt - 4.32 PPW
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.

Specifications

Full technical specification of AMD Ryzen 5 8640U and Ryzen 5 6600U

General

Vendor Amd Amd
Released December 6, 2023 January 4, 2022
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Zen 4 (Hawk Point) Zen 3+ (Rembrandt)
Integrated GPU Radeon 760M Radeon 660M
Rival Equivalent - Intel Core Ultra 7 155U - Intel Core i7 1260P
Successor - - AMD Ryzen 5 8640U
AMD Ryzen CPU ranking (86th and 139th place)

CPU

Performance Cores
P-Cores 6 6
P-Threads 12 12
Base Frequency (P) 3.5 GHz 2.9 GHz
Turbo Boost Frequency (P) 4.9 GHz 4.5 GHz
Total
Total Cores 6 6
Total Threads 12 12
Bus Frequency 100 MHz 100 MHz
Multiplier 35x 29x
L1 Cache 64K (per core) 64K (per core)
L2 Cache 1MB (per core) 512K (per core)
L3 Cache 16MB (shared) 16MB (shared)
Unlocked Multiplier No No

Package

Transistors 25 billions -
Fabrication Process 4 nm 6 nm
TDP (PL1) 15-30 W (configurable) 15-28 W (configurable)
Socket FP8 FP7
Peak Temperature 100°C 95°C

iGPU

Integrated Graphics Radeon 760M AMD Radeon 660M
GPU Base Clock 800 MHz 400 MHz
GPU Boost Clock 2600 MHz 1900 MHz
Shading Units 512 384
TMUs 32 24
ROPs 16 16
Execution Units 8 6
TGP 15 W 15 W
iGPU FLOPS
Ryzen 5 8640U +80%
2.7 TFLOPS
Ryzen 5 6600U
1.5 TFLOPS
More info: Radeon 660M compared to Radeon 760M

Memory Support

Memory Types - DDR5-5600
- LPDDR5x-7500		 - DDR5-4800
- LPDDR5-6400
Max. Memory Size 256 GB 64 GB
Memory Channels 2 2
Max. Memory Bandwidth - 76.8 GB/s
ECC Support No No

Misc

Official Site AMD Ryzen 5 8640U official page AMD Ryzen 5 6600U official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

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Competitors

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Comments

So which CPU will you choose: AMD Ryzen 5 6600U or Ryzen 5 8640U?
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