AMD Ryzen 9 7940H vs AMD Ryzen 5 7645HX

Comparative analysis of AMD Ryzen 9 7940H 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.

AMD Ryzen 9 7940H

AMD Ryzen 5 7645HX

Differences

Reasons to consider the AMD Ryzen 9 7940H

2 more cores, run more applications at once: 8 vs 6
4 more threads: 16 vs 12
Around 4% higher clock speed: 5.2 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 1% better performance in PassMark - Single thread mark: 3956 vs 3915
Around 7% better performance in PassMark - CPU mark: 28660 vs 26868

Specifications (specs)
Number of cores	8 vs 6
Number of threads	16 vs 12
Maximum frequency	5.2 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 - Single thread mark	3956 vs 3915
PassMark - CPU mark	28660 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

L3 cache	32MB (shared) vs 16MB (shared)

Compare benchmarks

CPU 1: AMD Ryzen 9 7940H
CPU 2: AMD Ryzen 5 7645HX

PassMark - Single thread mark

CPU 1

CPU 2

3956

3915

PassMark - CPU mark

CPU 1

CPU 2

28660

26868

Name	AMD Ryzen 9 7940H	AMD Ryzen 5 7645HX
PassMark - Single thread mark	3956	3915
PassMark - CPU mark	28660	26868

Compare specifications (specs)

	AMD Ryzen 9 7940H	AMD Ryzen 5 7645HX
Essentials
Launch date	Jan 2023	4 Jan 2023
Place in performance rating	181	199
Performance
Base frequency	4 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	5.2 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	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)