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AMD Ryzen 9 7945HX3D vs AMD Ryzen 9 9955HX3D: Comparison
Ryzen 9 7945HX3D vs Ryzen 9 9955HX3D: the p-core base clock difference
They are built to different briefs, and p-core base clock shows it, Ryzen 9 7945HX3D 2.3 GHz against Ryzen 9 9955HX3D 2.5 GHz. They differ on release year too, 2023 on the Ryzen 9 7945HX3D versus 2025 on the Ryzen 9 9955HX3D. There is a split on igpu as well, AMD Radeon 610M Graphics on the Ryzen 9 7945HX3D versus AMD Radeon 610M on the Ryzen 9 9955HX3D. Microarchitecture is not the same on both, Zen 4 on the Ryzen 9 7945HX3D versus Zen 5 on the Ryzen 9 9955HX3D. There is a split on base power as well, 55 W on the Ryzen 9 7945HX3D versus 55-75W on the Ryzen 9 9955HX3D. Memory type is not the same on both, DDR5 on the Ryzen 9 7945HX3D versus DDR5, 2-Channel on the Ryzen 9 9955HX3D.
Which should you buy, Ryzen 9 7945HX3D or Ryzen 9 9955HX3D?
The Ryzen 9 7945HX3D is the one to take for high-end gaming laptops and mobile workstations, though it is not the pick for thin-and-light laptops and battery-focused ultraportables. The Ryzen 9 9955HX3D suits 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 7945HX3D (9.1/10): the AMD Ryzen 9 7945HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis. 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
Where they agree, they agree completely, total cores, performance cores, efficiency cores, total threads and p-core boost clock included, so the decision does not turn on any of those. They match on 7 further specifications as well.
Frequently asked questions
Is the TDP the same on the Ryzen 9 7945HX3D and Ryzen 9 9955HX3D?
It is. Both are listed at 55 W, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 7945HX3D
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Codename
- AMD Ryzen 9 7945HX3D
- Dragon Range
- AMD Ryzen 9 9955HX3D
- Fire Range
Release Year
- AMD Ryzen 9 7945HX3D
- 2023
- AMD Ryzen 9 9955HX3D
- 2025
TDP
- AMD Ryzen 9 7945HX3D
- 55 W
- AMD Ryzen 9 9955HX3D
- 55 W
iGPU
- AMD Ryzen 9 7945HX3D
- AMD Radeon 610M Graphics (RDNA 2)
- AMD Ryzen 9 9955HX3D
- AMD Radeon 610M
Market Segment
- AMD Ryzen 9 7945HX3D
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Microarchitecture
- AMD Ryzen 9 7945HX3D
- Zen 4 (7040/9955 Dragon Range)
- AMD Ryzen 9 9955HX3D
- Zen 5 (Fire Range)
Socket
- AMD Ryzen 9 7945HX3D
- FL1
- AMD Ryzen 9 9955HX3D
- FL1
Process Node
- AMD Ryzen 9 7945HX3D
- 5 nm
- AMD Ryzen 9 9955HX3D
- TSMC 4nm FinFET
Total Cores
- AMD Ryzen 9 7945HX3D
- 16
- AMD Ryzen 9 9955HX3D
- 16
Performance Cores
- AMD Ryzen 9 7945HX3D
- 16
- AMD Ryzen 9 9955HX3D
- 16
Efficiency Cores
- AMD Ryzen 9 7945HX3D
- 0
- AMD Ryzen 9 9955HX3D
- 0
Total Threads
- AMD Ryzen 9 7945HX3D
- 32
- AMD Ryzen 9 9955HX3D
- 32
SMT Enabled
- AMD Ryzen 9 7945HX3D
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
P-Core Base Clock
- AMD Ryzen 9 7945HX3D
- 2.3 GHz
- AMD Ryzen 9 9955HX3D
- 2.5 GHz
P-Core Boost Clock
- AMD Ryzen 9 7945HX3D
- 5.4 GHz
- AMD Ryzen 9 9955HX3D
- 5.4 GHz
L3 Cache
- AMD Ryzen 9 7945HX3D
- 128 MB
- AMD Ryzen 9 9955HX3D
- 128 MB
Base Power
- AMD Ryzen 9 7945HX3D
- 55 W
- AMD Ryzen 9 9955HX3D
- 55-75W
Memory Type
- AMD Ryzen 9 7945HX3D
- DDR5
- AMD Ryzen 9 9955HX3D
- DDR5, 2-Channel
Integrated Graphics
- AMD Ryzen 9 7945HX3D
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
Which one should you pick?
Choose 7945HX3D if you want the higher L3 cache (128 MB vs 128 MB).
Choose 9955HX3D if you already have it on hand or find it at a lower price.
Verdict
AMD Ryzen 9 7945HX3D
9.1 / 10 Expert Rating
The AMD Ryzen 9 7945HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis.
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.