AMD Ryzen 9 6900HX vs AMD Ryzen 5 8645HS

Compare AMD Ryzen 9 Mobile 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

7025 points
7040 points
0.21% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

8549 points
9593 points
12% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

6518 points
4% slightly better multitasking score
6234 points

Heavy Workload Score

Performance in workloads using up to 16 cores

6374 points
5% slightly better heavy workload score
6029 points

Free CPU Benchmark

Want to compare your processor against the Ryzen 9 6900HX and the Ryzen 5 8645HS? Download our free and quick PC Performance Test.

Other Benchmarks

Blender score

Blender score

Cycles Render (Samples per minute)

184.59 points
17% slightly 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

3.30 GHz
4.30 GHz
30% slightly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

4.9 GHz
5 GHz
2% slightly higher turbo speed

TDP

Thermal Design Power: Measure of heat generated by the CPU

45 W
Identical
45 W

Memory Channels

Lanes for simultaneous memory access

4
100% significantly more memory channels
2

L2 Cache

Secondary embedded memory, slower than L1 cache

4 MiB
6 MiB
49% significantly more L2 cache

L3 Cache

General memory pool for all cores

16 MiB
Identical
16 MiB

Other details

Rank

Ranking in the hardwareDB database

192nd of 1,089
189th of 1,089

Family

The product line

Ryzen 9 Mobile
Ryzen 5

Memory Type

The type of memory used by this chip

DDR5
DDR5 (FP7r2)

Is Unlocked

Can this CPU can be overclocked

Yes
No

Ryzen 9 6900HX vs Ryzen 5 8645HS comparison

In our benchmarks, the Ryzen 5 8645HS beats the Ryzen 9 6900HX in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Ryzen 9 6900HX in all gaming tests too.

With info from our database, we find that the Ryzen 9 6900HX 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. With our hardware info, we find that the Ryzen 5 8645HS has a slightly higher clock speed than the Ryzen 9 6900HX. Also, the Ryzen 5 8645HS has a slightly higher turbo speed. Both these chips have an identical TDP (Thermal Design Power). This measures the amount of heat they output and can be used to estimate power consumption. The info from our database shows that the Ryzen 5 8645HS has more L2 cache than the Ryzen 9 6900HX. 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 9 6900HX has more threads than cores. Each physical core is split into multiple threads.

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