AMD Ryzen 9 3900XT vs AMD Ryzen 9 8940HX

Compare AMD Ryzen 9 Desktop 12 core CPU vs AMD Ryzen 8000 Series 16 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

8378 points

10700 points

27% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

8533 points

10758 points

26% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

8330 points

10731 points

28% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

8329 points

10842 points

30% slightly better heavy workload score

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Other Benchmarks

Blender score

Cycles Render (Samples per minute)

275.17 points

458.15 points

66% significantly higher Blender 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

3.8 GHz

31% slightly higher clock speed

2.9 GHz

Turbo Speed

Higher frequency used for heavy workloads

4.7 GHz

5.3 GHz

12% slightly higher turbo speed

TDP

Thermal Design Power: Measure of heat generated by the CPU

105 W

55 W

90% significantly lower TDP

L1 Cache

Smallest embedded memory, but the fastest

768 KiB

1024 KiB

33% slightly more L1 cache

L2 Cache

Secondary embedded memory, slower than L1 cache

6 MiB

49% significantly more L2 cache

4 MiB

L3 Cache

General memory pool for all cores

64 MiB

700% significantly more L3 cache

8 MiB

Other details

Rank

Ranking in the hardwareDB database

131st of 1,089

75th of 1,089

Family

The product line

Ryzen 9 Desktop

Ryzen 8000 Series

Release date

The official date of release of this chip

2020 July

2025 April

Memory Type

The type of memory used by this chip

DDR4

DDR5

Is Unlocked

Can this CPU can be overclocked

Yes

Ryzen 9 3900XT vs Ryzen 9 8940HX specs and performance

Our benchmark analysis concludes that the Ryzen 9 8940HX performs better than the Ryzen 9 3900XT. Furthermore, our gaming benchmark shows that it also outperforms the Ryzen 9 3900XT in all gaming tests too.

When comparing core counts for these CPUs, we notice that the Ryzen 9 8940HX has slightly more cores with 16 cores compared to the Ryzen 9 3900XT that has 12 cores. It also has more threads than the Ryzen 9 3900XT. With our hardware info, we find that the Ryzen 9 3900XT has a slightly higher clock speed than the Ryzen 9 8940HX. Despite this, the Ryzen 9 8940HX has a slightly higher turbo speed. The Ryzen 9 8940HX outputs less heat than Ryzen 9 3900XT thanks to a significantly lower TDP. 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 9 3900XT has more L2 cache than the Ryzen 9 8940HX. The Ryzen 9 3900XT also has significantly more 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 3900XT has more threads than cores. Each physical core is split into multiple threads.