Home > CPU Comparison > Ryzen 7 7840U or Ryzen 5 8540U: what's better?

AMD Ryzen 7 7840U vs Ryzen 5 8540U

57 out of 100
AMD Ryzen 7 7840U
VS
53 out of 100
AMD Ryzen 5 8540U
AMD Ryzen 7 7840U
AMD Ryzen 5 8540U

We compared two laptop CPUs: the 3.3 GHz AMD Ryzen 7 7840U with 8-cores against the 3.7 GHz Ryzen 5 8540U 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.
๐Ÿ”Œ Usage Scenario:

Key Differences

What are the key differences between 8540U and 7840U
Advantages of AMD Ryzen 7 7840U
  • More powerful Radeon 780M integrated graphics: 4.1 vs 1.4 TFLOPS
  • Has 2 more physical cores
  • 4% higher Turbo Boost frequency (5.1 GHz vs 4.9 GHz)
Advantages of AMD Ryzen 5 8540U
  • Newer - released 8 months later

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Ryzen 7 7840U
vs
Ryzen 5 8540U

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 7840U +17%
10726
Ryzen 5 8540U
9174
File compression 1110 MB/sec 1010 MB/sec
Clang compilation 82.2 Klines/sec 62.7 Klines/sec
HTML 5 Browser 210.4 pages/sec 179.9 pages/sec
PDF Renderer 298.4 Mpixels/sec 226.9 Mpixels/sec
Text processing 250.6 pages/sec 247.2 pages/sec
Background blur 47.5 images/sec 42.7 images/sec
Photo processing 90.5 images/sec 74.8 images/sec
Ray tracing 17.5 Mpixels/sec 13.7 Mpixels/sec
Sources: GeekBench [1], [2] โ€“ 1087 & 3 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Ryzen 7 7840U +33%
24383
Ryzen 5 8540U
18287
Integer math 89.3 GOps/sec 57.3 GOps/sec
Floating point math 50.9 GOps/sec 35 GOps/sec
Find prime numbers 79M Primes/sec 68M Primes/sec
Random string sorting 33.5M Strings/sec 24.7M Strings/sec
Data encryption 17.4 GBytes/sec 12.2 GBytes/sec
Data compression 282.7 MBytes/sec 207.6 MBytes/sec
Physics 1245 Frames/sec 997 Frames/sec
Extended instructions 20B Matrices/sec 15B Matrices/sec
Sources: PassMark [3], [4] โ€“ 551 & 134 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Ryzen 7 7840U +61%
199.52
Ryzen 5 8540U
123.6

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 24.3 PPW 18.9 PPW
Geekbench 6 Multi / Watt 357.5 PPW 305.8 PPW
Passmark CPU Mark / Watt 812.8 PPW 609.6 PPW
Blender / Watt 6.65 PPW 4.12 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 7840U
DateBenchmarkResult
๐Ÿ“˜ 2025-08-03 (Aaron)Cinebench 202493 / 764
๐Ÿ“˜ 2025-03-15 (JP)Cinebench 202496 / 728
Add View all (2)
AMD Ryzen 5 8540U
No benchmark results yet
Add

Specifications

Full technical specification of AMD Ryzen 7 7840U and Ryzen 5 8540U

General

Vendor Amd Amd
Released May 3, 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 740M
Rival Equivalent - Intel Core i7 1370P - Intel Core Ultra 5 125U
Successor - AMD Ryzen 7 250 - AMD Ryzen 5 230
AMD Ryzen CPU ranking (82nd and 94th place)

CPU

Performance Cores
P-Cores 8 2
P-Threads 16 4
Base Frequency (P) 3.3 GHz 3.7 GHz
Turbo Boost Frequency (P) 5.1 GHz 4.9 GHz
Efficient Cores
E-Cores - 4
E-Threads - 8
Base Frequency (E) - 3 GHz
Turbo Boost Frequency (E) - 3.7 GHz
Total
Total Cores 8 6
Total Threads 16 12
Bus Frequency 100 MHz 100 MHz
Multiplier 33x 37x
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 20.9 billions
Fabrication Process 4 nm 4 nm
TDP (PL1) 15-30 W (configurable) 15-30 W (configurable)
Socket FP8 FP7
Peak Temperature 100ยฐC 100ยฐC
Laptop processors ranking (130th and 169th place)

iGPU

Integrated Graphics Radeon 780M Radeon 740M
GPU Base Clock 800 MHz 800 MHz
GPU Boost Clock 2700 MHz 2800 MHz
Shading Units 768 256
TMUs 48 16
ROPs 32 8
Execution Units 12 4
TGP 15 W 15 W
iGPU FLOPS
Ryzen 7 7840U +193%
4.1 TFLOPS
Ryzen 5 8540U
1.4 TFLOPS
More info: Radeon 740M 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 7840U official page AMD Ryzen 5 8540U official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 14

Cast your vote

Choose between two processors
5 (83.3%)
1 (16.7%)
Total votes: 6

Competitors

1. AMD Ryzen 7 7840U vs Intel Core i7 1360P (1)
2. AMD Ryzen 7 7840U vs Intel Core Ultra 7 155H (3)
3. AMD Ryzen 7 7840U vs Intel Core i7 1355U
4. AMD Ryzen 5 8540U vs Intel Core i7 1355U
5. AMD Ryzen 5 8540U vs Intel Core i5 1335U
6. AMD Ryzen 5 8540U vs AMD Ryzen 7 8840U
7. AMD Ryzen 5 8540U vs Intel Core Ultra 5 125U
8. AMD Ryzen 5 8540U vs AMD Ryzen 5 7540U
9. AMD Ryzen 5 8540U vs AMD Ryzen 5 8640U
Compare other CPUs (460+)

Comments

So which CPU will you choose: AMD Ryzen 5 8540U or Ryzen 7 7840U?
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