AMD Ryzen 7 7840HS vs AMD Ryzen 5 8645HS

Compare AMD Ryzen 7 8 core CPU vs AMD Ryzen 5 6 core processor, specs and benchmark score. Which is the better CPU for gaming?

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Benchmark Score

Overall Score

A combined score of all workloads

8878 points
26% slightly better overall score
7040 points

Gaming Score

The raw gaming performance with a fast GPU

10890 points
13% slightly better gaming score
9593 points

Multitasking Score

Performance in workloads using up to 8 cores

8202 points
31% slightly better multitasking score
6234 points

Heavy Workload Score

Performance in workloads using up to 16 cores

8008 points
32% slightly better heavy workload score
6029 points

Free CPU Benchmark

Want to compare your processor against the Ryzen 7 7840HS and the Ryzen 5 8645HS? Download our free and quick PC Performance Test.

Other Benchmarks

Blender score

Blender score

Cycles Render (Samples per minute)

244.42 points
55% significantly higher Blender score
156.82 points

Specifications

Cores

Number of physical processing units

8
33% slightly more cores
6

Threads

Number of logical processing units

16
33% slightly more threads
12

Clock Speed

Base frequency at which the chip operates

3.80 GHz
4.30 GHz
13% slightly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

5.1 GHz
2% slightly higher turbo speed
5 GHz

TDP

Thermal Design Power: Measure of heat generated by the CPU

54 W
45 W
20% slightly lower TDP

Memory Channels

Lanes for simultaneous memory access

2
Identical
2

L2 Cache

Secondary embedded memory, slower than L1 cache

8 MiB
33% slightly more L2 cache
6 MiB

L3 Cache

General memory pool for all cores

16 MiB
Identical
16 MiB

Other details

Rank

Ranking in the hardwareDB database

116th of 1,089
189th of 1,089

Family

The product line

Ryzen 7
Ryzen 5

Memory Type

The type of memory used by this chip

DDR5 (FP7r2)
DDR5 (FP7r2)

Is Unlocked

Can this CPU can be overclocked

No
No

Ryzen 7 7840HS vs Ryzen 5 8645HS benchmarks

According to the hardwareDB Benchmark tool, the Ryzen 7 7840HS is faster than the Ryzen 5 8645HS. Furthermore, our gaming benchmark shows that it also outperforms the Ryzen 5 8645HS in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Ryzen 7 7840HS has slightly more cores than the Ryzen 5 8645HS. Indeed, the Ryzen 7 7840HS has 8 cores compared to 6 cores found in the Ryzen 5 8645HS. It also has more threads than the Ryzen 5 8645HS. Our comparison shows that the Ryzen 5 8645HS has a slightly higher clock speed compared to the Ryzen 7 7840HS. Despite this, the Ryzen 7 7840HS has a slightly higher turbo speed. The Ryzen 5 8645HS outputs less heat than Ryzen 7 7840HS thanks to a slightly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The cache sizes of these CPUs are different. Indeed, the Ryzen 7 7840HS has slightly more L2 cache than the Ryzen 5 8645HS. However, both these chips have the same amount of L3 cache.

Most CPUs have more threads than cores. This technology, colloquially called hyperthreading, improves performance by splitting a core into multiple virtual ones. This provides more efficient utilisation of a core. Indeed, the Ryzen 7 7840HS has more threads than cores. Each physical core is split into multiple threads.

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