CPU Comparison: AMD Ryzen 7 7840U vs AMD Ryzen 5 7645HX
Key Findings
- The AMD Ryzen 5 7645HX leads in single-threaded performance by up to 8.7%
- In multi-threaded workloads, the AMD Ryzen 5 7645HX shows superior performance with a 7.5% advantage
- The AMD Ryzen 7 7840U has the highest core count with 8 cores
Performance Rankings & Market Position
AMD Ryzen 7 7840U
Release Date
Q2 2023
Market Position
467th fastest in multithreading
4890 CPUs246th fastest in single threading
4890 CPUs63rd fastest in
1434 Laptop CPUs
AMD Ryzen 5 7645HX
Release Date
Q1 2024
Market Position
415th fastest in multithreading
4890 CPUs127th fastest in single threading
4890 CPUs53rd fastest in
1434 Laptop CPUs
Performance
Single-Thread Performance
7840U
3,602
7645HX
3,915
Multi-Thread Performance
7840U
24,990
7645HX
26,868
Specifications: AMD Ryzen 7 7840U vs AMD Ryzen 5 7645HX
💻CPU Model
AMD Ryzen 7 7840U
7840U
AMD Ryzen 5 7645HX
7645HX
🔄Other Names
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
AMD Ryzen 5 7645HX with Radeon Graphics
7645HX
âš¡Base Clock
3.3 GHz
7840U
4.0 GHz
7645HX
🚀Turbo Clock
5.1 GHz
7840U
5.0 GHz
7645HX
💻Cores/Threads
8 Threads: 16
7840U
6 Threads: 12
7645HX
🔌Socket
N/A
7840U
AM5 (LGA 1718)
7645HX
âš¡TDP
30 W
7840U
55 W
7645HX
💾Cache
L1 Instruction Cache: 8 x 32 KBL1 Data Cache: 8 x 32 KBL2 Cache: 8 x 1024 KBL3 Cache: 16 MB
7840U
L1 Instruction Cache: 6 x 32 KBL1 Data Cache: 6 x 32 KBL2 Cache: 6 x 1024 KBL3 Cache: 32 MB
7645HX
The AMD Ryzen 7 7840U and AMD Ryzen 5 7645HX compete in the Laptop segment. The AMD Ryzen 5 7645HX leads in single-thread performance, which is crucial for gaming and everyday tasks.
For multi-threaded applications, the AMD Ryzen 5 7645HX takes the lead, despite having the same core count.
Power consumption differs significantly, with the AMD Ryzen 5 7645HX drawing more power under load (55W vs 30W). This may impact system thermal design and power supply requirements.
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