AMD Ryzen 9 6900HX vs AMD Ryzen 5 8640HS

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?

Benchmark Score
Other Benchmarks
Specifications
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Benchmark Score

Overall Score

A combined score of all workloads

7025 points

9% slightly better overall score

6405 points

Gaming Score

The raw gaming performance with a fast GPU

8549 points

9018 points

5% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

6518 points

16% slightly better multitasking score

5593 points

Heavy Workload Score

Performance in workloads using up to 16 cores

6374 points

17% slightly better heavy workload score

5403 points

Free CPU Benchmark

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Other Benchmarks

Blender score

Cycles Render (Samples per minute)

184.59 points

20% slightly higher Blender score

153.60 points

Geekbench 6 (multi) score

Multi threaded benchmark

9459 points

18% slightly higher Geekbench 6 (multi) score

7982 points

Geekbench 6 (single) score

Single threaded benchmark

1979 points

2119 points

7% slightly higher Geekbench 6 (single) score

Specifications

Cores

Number of physical processing units

33% slightly more cores

Threads

Number of logical processing units

33% slightly more threads

Clock Speed

Base frequency at which the chip operates

3.30 GHz

3.50 GHz

6% slightly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

4.9 GHz

Identical

4.9 GHz

TDP

Thermal Design Power: Measure of heat generated by the CPU

45 W

28 W

60% significantly lower TDP

Memory Channels

Lanes for simultaneous memory access

100% significantly more memory channels

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

227th 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

Ryzen 9 6900HX vs Ryzen 5 8640HS specs and performance

According to the hardwareDB Benchmark tool, the Ryzen 9 6900HX is faster than the Ryzen 5 8640HS. Despite this, the Ryzen 5 8640HS has the advantage in our gaming benchmark.

With info from our database, we find that the Ryzen 9 6900HX has slightly more cores with 8 cores whereas the Ryzen 5 8640HS has 6 cores. It also has more threads than the Ryzen 5 8640HS. These CPUs have different clock speeds. Indeed, the Ryzen 5 8640HS has a slightly higher clock speed compared to the Ryzen 9 6900HX. The info from our database shows that the Ryzen 5 8640HS has more L2 cache than the Ryzen 9 6900HX. However, both these chips have the same amount of L3 cache.

Modern CPUs generally have more logical cores than physical cores, this means that each core is split into multiple virtual cores, improving efficiency for parallel workloads. Indeed, the Ryzen 9 6900HX has more threads than cores. Each physical core is split into multiple threads.