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AMD Ryzen 9 7940HX vs AMD Ryzen 9 9955HX3D: Comparison
Ryzen 9 7940HX vs Ryzen 9 9955HX3D: the l3 cache difference
The gap that matters here is l3 cache: Ryzen 9 7940HX 64 MB against Ryzen 9 9955HX3D 128 MB, which puts Ryzen 9 9955HX3D 50% ahead. There is a split on microarchitecture as well, Zen 4 on the Ryzen 9 7940HX versus Zen 5 on the Ryzen 9 9955HX3D. Base power is not the same on both, 55 W on the Ryzen 9 7940HX versus 55-75W on the Ryzen 9 9955HX3D. They differ on memory type too, DDR5 on the Ryzen 9 7940HX versus DDR5, 2-Channel on the Ryzen 9 9955HX3D.
Which should you buy, Ryzen 9 7940HX or Ryzen 9 9955HX3D?
Buy the Ryzen 9 7940HX for gaming laptops and mobile content creation, though it is not the pick for thin-and-light ultraportables and all-day battery life needs. The Ryzen 9 9955HX3D is the one to take for high-end gaming laptops and mobile workstations, though it is the wrong buy for thin-and-light laptops and battery-focused ultraportables. Our rating of the Ryzen 9 7940HX (8.5/10): the AMD Ryzen 9 7940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads. Our rating of the Ryzen 9 9955HX3D (9.1/10): the AMD Ryzen 9 9955HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis.
Where the two are identical
The common ground is wider than the gap: total cores, performance cores, efficiency cores, total threads and tdp are identical here. They match on 5 further specifications as well.
Frequently asked questions
Do the Ryzen 9 7940HX and Ryzen 9 9955HX3D differ on p-core boost clock?
Yes. P-Core Boost Clock reads 5.2 GHz on the Ryzen 9 7940HX versus 5.4 GHz on the Ryzen 9 9955HX3D.
Is the Integrated Graphics the same on the Ryzen 9 7940HX and Ryzen 9 9955HX3D?
It is. Both are listed at Yes, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 7940HX
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Codename
- AMD Ryzen 9 7940HX
- Dragon Range
- AMD Ryzen 9 9955HX3D
- Fire Range
Release Year
- AMD Ryzen 9 7940HX
- 2024
- AMD Ryzen 9 9955HX3D
- 2025
TDP
- AMD Ryzen 9 7940HX
- 55 W
- AMD Ryzen 9 9955HX3D
- 55 W
iGPU
- AMD Ryzen 9 7940HX
- AMD Radeon 610M Graphics (RDNA 2)
- AMD Ryzen 9 9955HX3D
- AMD Radeon 610M
Market Segment
- AMD Ryzen 9 7940HX
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Microarchitecture
- AMD Ryzen 9 7940HX
- Zen 4 (Dragon Range)
- AMD Ryzen 9 9955HX3D
- Zen 5 (Fire Range)
Socket
- AMD Ryzen 9 7940HX
- FL1
- AMD Ryzen 9 9955HX3D
- FL1
Process Node
- AMD Ryzen 9 7940HX
- 5 nm
- AMD Ryzen 9 9955HX3D
- TSMC 4nm FinFET
Total Cores
- AMD Ryzen 9 7940HX
- 16
- AMD Ryzen 9 9955HX3D
- 16
Performance Cores
- AMD Ryzen 9 7940HX
- 16
- AMD Ryzen 9 9955HX3D
- 16
Efficiency Cores
- AMD Ryzen 9 7940HX
- 0
- AMD Ryzen 9 9955HX3D
- 0
Total Threads
- AMD Ryzen 9 7940HX
- 32
- AMD Ryzen 9 9955HX3D
- 32
SMT Enabled
- AMD Ryzen 9 7940HX
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
P-Core Base Clock
- AMD Ryzen 9 7940HX
- 2.4 GHz
- AMD Ryzen 9 9955HX3D
- 2.5 GHz
P-Core Boost Clock
- AMD Ryzen 9 7940HX
- 5.2 GHz
- AMD Ryzen 9 9955HX3D
- 5.4 GHz
L3 Cache
- AMD Ryzen 9 7940HX
- 64 MB-50%
- AMD Ryzen 9 9955HX3D
- 128 MBBest
Base Power
- AMD Ryzen 9 7940HX
- 55 W
- AMD Ryzen 9 9955HX3D
- 55-75W
Memory Type
- AMD Ryzen 9 7940HX
- DDR5
- AMD Ryzen 9 9955HX3D
- DDR5, 2-Channel
Integrated Graphics
- AMD Ryzen 9 7940HX
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
Which one should you pick?
Choose 7940HX if you already have it on hand or find it at a lower price.
Choose 9955HX3D if you want the higher L3 cache (128 MB vs 64 MB).
Verdict
AMD Ryzen 9 7940HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 7940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.
AMD Ryzen 9 9955HX3D
9.1 / 10 Expert Rating
The AMD Ryzen 9 9955HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis.