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AMD Ryzen 9 8940HX vs AMD Ryzen 9 9955HX: Comparison
Ryzen 9 8940HX vs Ryzen 9 9955HX: the p-core boost clock difference
They are built to different briefs, and p-core boost clock shows it, Ryzen 9 8940HX 5.2 GHz against Ryzen 9 9955HX 5.4 GHz. Microarchitecture is not the same on both, Zen 4 on the Ryzen 9 8940HX versus Zen 5 on the Ryzen 9 9955HX. They differ on base power too, 55 W on the Ryzen 9 8940HX versus 55-75W on the Ryzen 9 9955HX. There is a split on memory type as well, DDR5 on the Ryzen 9 8940HX versus DDR5, 2-Channel on the Ryzen 9 9955HX.
Who each one is for
The Ryzen 9 8940HX is the one to take for gaming laptops and mobile content creation, though it is the wrong buy for thin-and-light ultraportables and all-day battery life needs. The Ryzen 9 9955HX suits gaming laptops and mobile content creation, though it is not built for thin-and-light ultraportables and all-day battery life needs. Our rating of the Ryzen 9 8940HX (8.5/10): the AMD Ryzen 9 8940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads. Our rating of the Ryzen 9 9955HX (8.5/10): the AMD Ryzen 9 9955HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.
Where the two are identical
Everything else lines up. Total cores, performance cores, efficiency cores, total threads and tdp read the same on both, so those are not worth weighing. They match on 6 further specifications as well.
Frequently asked questions
Do the Ryzen 9 8940HX and Ryzen 9 9955HX differ on p-core base clock?
Yes. P-Core Base Clock reads 2.9 GHz on the Ryzen 9 8940HX versus 2.5 GHz on the Ryzen 9 9955HX.
Is the L3 Cache the same on the Ryzen 9 8940HX and Ryzen 9 9955HX?
It is. Both are listed at 64 MB, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 8940HX
- Laptop
- AMD Ryzen 9 9955HX
- Laptop
Codename
- AMD Ryzen 9 8940HX
- Dragon Range
- AMD Ryzen 9 9955HX
- Fire Range
Release Year
- AMD Ryzen 9 8940HX
- 2025
- AMD Ryzen 9 9955HX
- 2025
TDP
- AMD Ryzen 9 8940HX
- 55 W
- AMD Ryzen 9 9955HX
- 55 W
iGPU
- AMD Ryzen 9 8940HX
- AMD Radeon 610M Graphics (RDNA 2)
- AMD Ryzen 9 9955HX
- AMD Radeon 610M
Market Segment
- AMD Ryzen 9 8940HX
- Laptop
- AMD Ryzen 9 9955HX
- Laptop
Microarchitecture
- AMD Ryzen 9 8940HX
- Zen 4 (Dragon Range)
- AMD Ryzen 9 9955HX
- Zen 5 (Fire Range)
Socket
- AMD Ryzen 9 8940HX
- BGA (soldered, mobile)
- AMD Ryzen 9 9955HX
- FL1
Process Node
- AMD Ryzen 9 8940HX
- 5 nm
- AMD Ryzen 9 9955HX
- TSMC 4nm FinFET
Total Cores
- AMD Ryzen 9 8940HX
- 16
- AMD Ryzen 9 9955HX
- 16
Performance Cores
- AMD Ryzen 9 8940HX
- 16
- AMD Ryzen 9 9955HX
- 16
Efficiency Cores
- AMD Ryzen 9 8940HX
- 0
- AMD Ryzen 9 9955HX
- 0
Total Threads
- AMD Ryzen 9 8940HX
- 32
- AMD Ryzen 9 9955HX
- 32
SMT Enabled
- AMD Ryzen 9 8940HX
- Yes
- AMD Ryzen 9 9955HX
- Yes
P-Core Base Clock
- AMD Ryzen 9 8940HX
- 2.9 GHz
- AMD Ryzen 9 9955HX
- 2.5 GHz
P-Core Boost Clock
- AMD Ryzen 9 8940HX
- 5.2 GHz
- AMD Ryzen 9 9955HX
- 5.4 GHz
L3 Cache
- AMD Ryzen 9 8940HX
- 64 MB
- AMD Ryzen 9 9955HX
- 64 MB
Base Power
- AMD Ryzen 9 8940HX
- 55 W
- AMD Ryzen 9 9955HX
- 55-75W
Memory Type
- AMD Ryzen 9 8940HX
- DDR5
- AMD Ryzen 9 9955HX
- DDR5, 2-Channel
Integrated Graphics
- AMD Ryzen 9 8940HX
- Yes
- AMD Ryzen 9 9955HX
- Yes
Which one should you pick?
Choose 8940HX if you want the higher L3 cache (64 MB vs 64 MB).
Choose 9955HX if you already have it on hand or find it at a lower price.
Verdict
AMD Ryzen 9 8940HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 8940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.
AMD Ryzen 9 9955HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 9955HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.