CPU Comparison: AMD Ryzen 7 7840S vs AMD Ryzen 3 5400U

Key Findings

The AMD Ryzen 7 7840S leads in single-threaded performance by up to 34.2%
In multi-threaded workloads, the AMD Ryzen 7 7840S shows superior performance with a 119.7% advantage
The AMD Ryzen 7 7840S has the highest core count with 8 cores

Performance Rankings & Market Position

AMD Ryzen 7 7840S

Laptop

Release Date

Q3 2023

Market Position

494th fastest in multithreading

4890 CPUs219th fastest in single threading

4890 CPUs72nd fastest in

1434 Laptop CPUs

AMD Ryzen 3 5400U

Laptop

Release Date

Q1 2021

Market Position

1125th fastest in multithreading

4890 CPUs638th fastest in single threading

4890 CPUs260th fastest in

1434 Laptop CPUs

Performance

Single-Thread Performance

7840S

3,685

5400U

2,746

Multi-Thread Performance

7840S

24,309

5400U

11,067

Specifications: AMD Ryzen 7 7840S vs AMD Ryzen 3 5400U

💻CPU Model

AMD Ryzen 7 7840S

7840S

AMD Ryzen 3 5400U

5400U

🔄Other Names

AMD Ryzen 7 7840S with Radeon 780M Graphics

7840S

AMD Ryzen 3 5400U with Radeon Graphics

5400U

⚡Base Clock

3.8 GHz

7840S

2.6 GHz

5400U

🚀Turbo Clock

5.1 GHz

7840S

4.0 GHz

5400U

💻Cores/Threads

8 Threads: 16

7840S

4 Threads: 8

5400U

🔌Socket

FP7 FP7r2 FP8

7840S

FP6

5400U

⚡TDP

54 W

7840S

15 W

5400U

💾Cache

L1 Instruction Cache: 8 x 32 KBL1 Data Cache: 8 x 32 KBL2 Cache: 8 x 1024 KBL3 Cache: 16 MB

7840S

L1 Instruction Cache: 4 x 32 KBL1 Data Cache: 4 x 32 KBL2 Cache: 4 x 512 KBL3 Cache: 8 MB

5400U

The AMD Ryzen 7 7840S and AMD Ryzen 3 5400U compete in the Laptop segment. The AMD Ryzen 7 7840S shows superior single-thread performance, making it better for tasks like gaming and light workloads.

For multi-threaded applications, the AMD Ryzen 3 5400U takes the lead, despite having the same core count.

Power consumption differs significantly, with the AMD Ryzen 7 7840S drawing more power under load (54W vs 15W). This may impact system thermal design and power supply requirements.