AMD Ryzen 7 7840H vs AMD Ryzen 5 7645HX

Comparative analysis of AMD Ryzen 7 7840H and AMD Ryzen 5 7645HX processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

 

Differences

Reasons to consider the AMD Ryzen 7 7840H

  • 2 more cores, run more applications at once: 8 vs 6
  • 4 more threads: 16 vs 12
  • Around 2% higher clock speed: 5.1 GHz vs 5 GHz
  • A newer manufacturing process allows for a more powerful, yet cooler running processor: 4 nm vs 5 nm
  • Around 33% more L1 cache; more data can be stored in the L1 cache for quick access later
  • Around 33% more L2 cache; more data can be stored in the L2 cache for quick access later
  • Around 29% lower typical power consumption: 35 Watt vs 45 Watt
  • Around 6% better performance in PassMark - CPU mark: 28390 vs 26868
Specifications (specs)
Number of cores 8 vs 6
Number of threads 16 vs 12
Maximum frequency 5.1 GHz vs 5 GHz
Manufacturing process technology 4 nm vs 5 nm
L1 cache 64K (per core) vs 64K (per core)
L2 cache 1MB (per core) vs 1MB (per core)
Thermal Design Power (TDP) 35 Watt vs 45 Watt
Benchmarks
PassMark - CPU mark 28390 vs 26868

Reasons to consider the AMD Ryzen 5 7645HX

  • 2x more L3 cache, more data can be stored in the L3 cache for quick access later
  • Around 5% better performance in PassMark - Single thread mark: 3915 vs 3720
Specifications (specs)
L3 cache 32MB (shared) vs 16MB (shared)
Benchmarks
PassMark - Single thread mark 3915 vs 3720

Compare benchmarks

CPU 1: AMD Ryzen 7 7840H
CPU 2: AMD Ryzen 5 7645HX

PassMark - Single thread mark
CPU 1
CPU 2
3720
3915
PassMark - CPU mark
CPU 1
CPU 2
28390
26868
Name AMD Ryzen 7 7840H AMD Ryzen 5 7645HX
PassMark - Single thread mark 3720 3915
PassMark - CPU mark 28390 26868

Compare specifications (specs)

AMD Ryzen 7 7840H AMD Ryzen 5 7645HX

Essentials

Launch date Jan 2023 4 Jan 2023
Place in performance rating 233 200

Performance

Base frequency 3.8 GHz 4 GHz
Die size 178 mm² 71 mm²
L1 cache 64K (per core) 64K (per core)
L2 cache 1MB (per core) 1MB (per core)
L3 cache 16MB (shared) 32MB (shared)
Manufacturing process technology 4 nm 5 nm
Maximum core temperature 100°C 100°C
Maximum frequency 5.1 GHz 5 GHz
Number of cores 8 6
Number of threads 16 12
Transistor count 25,000 million 6,570 million
Unlocked

Memory

ECC memory support
Supported memory types DDR5-5600 MHz, Dual-channel DDR5-5200 MHz, Dual-channel

Compatibility

Configurable TDP 35-54 Watt 75 Watt
Max number of CPUs in a configuration 1 1
Sockets supported FP8 FL1
Thermal Design Power (TDP) 35 Watt 45 Watt

Peripherals

PCIe configurations Gen 4, 20 Lanes, (CPU only) Gen 5, 28 Lanes, (CPU only)