AMD Ryzen 5 8645HS vs AMD Ryzen 7 PRO 7840U

Compare AMD Ryzen 5 6 core CPU vs AMD Ryzen 7 PRO 8 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

7040 points
0.17% slightly better overall score
7028 points

Gaming Score

The raw gaming performance with a fast GPU

9593 points
14% slightly better gaming score
8379 points

Multitasking Score

Performance in workloads using up to 8 cores

6234 points
6623 points
6% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

6029 points
6517 points
8% slightly better heavy workload score

Free CPU Benchmark

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

Other Benchmarks

Blender score

Blender score

Cycles Render (Samples per minute)

156.82 points
164.73 points
5% slightly higher Blender score

Specifications

Cores

Number of physical processing units

6
8
33% slightly more cores

Threads

Number of logical processing units

12
16
33% slightly more threads

Clock Speed

Base frequency at which the chip operates

4.30 GHz
30% slightly higher clock speed
3.30 GHz

Turbo Speed

Higher frequency used for heavy workloads

5 GHz
5.1 GHz
2% slightly higher turbo speed

Memory Channels

Lanes for simultaneous memory access

2
Identical
2

L2 Cache

Secondary embedded memory, slower than L1 cache

6 MiB
8 MiB
33% slightly more L2 cache

L3 Cache

General memory pool for all cores

16 MiB
Identical
16 MiB

Other details

Rank

Ranking in the hardwareDB database

189th of 1,089
191st of 1,089

Family

The product line

Ryzen 5
Ryzen 7 PRO

Release date

The official date of release of this chip

-
2023 June

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 5 8645HS vs Ryzen 7 PRO 7840U specs and performance

Our benchmark analysis concludes that the Ryzen 7 PRO 7840U performs better than the Ryzen 5 8645HS. Despite this, the Ryzen 5 8645HS has the advantage in our gaming benchmark.

With info from our database, we find that the Ryzen 7 PRO 7840U has slightly more cores with 8 cores whereas the Ryzen 5 8645HS has 6 cores. It also has more threads than the Ryzen 5 8645HS. These CPUs have different clock speeds. Indeed, the Ryzen 5 8645HS has a slightly higher clock speed compared to the Ryzen 7 PRO 7840U. In terms of cache, the Ryzen 7 PRO 7840U has slightly more L2 cache when compared to the Ryzen 5 8645HS. However, both these chips have the same amount of L3 cache.

The more cores a CPU has, the better the overall performance will be in parallel workloads such as multitasking. Many CPUs have more threads than cores, this means that each physical core is split into multiple logical cores, making them more efficient. Indeed, the Ryzen 5 8645HS has more threads than cores. Each physical core is split into multiple threads.

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