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

Key Findings

All CPUs perform similarly in single-threaded tasks
Multi-threaded performance is comparable among all CPUs

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 7 7840U

Laptop

Release Date

Q2 2023

Market Position

467th fastest in multithreading

4890 CPUs246th fastest in single threading

4890 CPUs63rd fastest in

1434 Laptop CPUs

Performance

Single-Thread Performance

7840S

3,685

7840U

3,602

Multi-Thread Performance

7840S

24,309

7840U

24,990

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

💻CPU Model

AMD Ryzen 7 7840S

7840S

AMD Ryzen 7 7840U

7840U

🔄Other Names

AMD Ryzen 7 7840S with Radeon 780M Graphics

7840S

AMD Ryzen 7 7840U w/ Radeon 780M Graphics, AMD Ryzen 7 7840U w/ Radeon 780M Graphics, AMD Ryzen 7 7840U w/ Radeon(TM) 780M Graphics, AMD Ryzen 7 7840U with Radeon 780M Graphics

7840U

⚡Base Clock

3.8 GHz

7840S

3.3 GHz

7840U

🚀Turbo Clock

5.1 GHz

7840S

5.1 GHz

7840U

💻Cores/Threads

8 Threads: 16

7840S

8 Threads: 16

7840U

🔌Socket

FP7 FP7r2 FP8

7840S

N/A

7840U

⚡TDP

54 W

7840S

30 W

7840U

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

7840U

The AMD Ryzen 7 7840S and AMD Ryzen 7 7840U 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 7 7840U 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 30W). This may impact system thermal design and power supply requirements.