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AMD Ryzen 9 7945HX vs AMD Ryzen 9 9955HX3D: Comparison
Ryzen 9 7945HX vs Ryzen 9 9955HX3D l3 cache compared
Start with l3 cache, because it is the widest measured gap between them: Ryzen 9 7945HX 64 MB against Ryzen 9 9955HX3D 128 MB, 50% in favour of Ryzen 9 9955HX3D. The benchmark result agrees. Blender Cycles (CPU) puts Ryzen 9 9955HX3D 7% ahead, 522 against 486. There is a split on base power as well, 55 W on the Ryzen 9 7945HX versus 55-75W on the Ryzen 9 9955HX3D. They differ on memory type too, DDR5 on the Ryzen 9 7945HX versus DDR5, 2-Channel on the Ryzen 9 9955HX3D.
Ryzen 9 7945HX vs Ryzen 9 9955HX3D: which one fits your build
The Ryzen 9 7945HX is the one to take for gaming laptops and mobile content creation, though it is not the pick for thin-and-light ultraportables and all-day battery life needs. Buy the Ryzen 9 9955HX3D for high-end gaming laptops and mobile workstations, though it is not built for thin-and-light laptops and battery-focused ultraportables. Our rating of the Ryzen 9 7945HX (8.5/10): the AMD Ryzen 9 7945HX 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.
What Ryzen 9 7945HX and Ryzen 9 9955HX3D have in common
Everything else lines up. Total cores, performance cores, efficiency cores, total threads and p-core boost clock read the same on both, so those are not worth weighing. They match on 7 further specifications as well.
Frequently asked questions
Do the Ryzen 9 7945HX and Ryzen 9 9955HX3D differ on release year?
Yes. Release Year reads 2023 on the Ryzen 9 7945HX versus 2025 on the Ryzen 9 9955HX3D.
Is the P-Core Base Clock the same on the Ryzen 9 7945HX and Ryzen 9 9955HX3D?
It is. Both are listed at 2.5 GHz, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 7945HX
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Codename
- AMD Ryzen 9 7945HX
- Dragon Range
- AMD Ryzen 9 9955HX3D
- Fire Range
Release Year
- AMD Ryzen 9 7945HX
- 2023
- AMD Ryzen 9 9955HX3D
- 2025
TDP
- AMD Ryzen 9 7945HX
- 55 W
- AMD Ryzen 9 9955HX3D
- 55 W
iGPU
- AMD Ryzen 9 7945HX
- AMD Radeon 610M Graphics (RDNA 2)
- AMD Ryzen 9 9955HX3D
- AMD Radeon 610M
Market Segment
- AMD Ryzen 9 7945HX
- Laptop
- AMD Ryzen 9 9955HX3D
- Laptop
Microarchitecture
- AMD Ryzen 9 7945HX
- Zen 4 (Dragon Range)
- AMD Ryzen 9 9955HX3D
- Zen 5 (Fire Range)
Socket
- AMD Ryzen 9 7945HX
- FL1
- AMD Ryzen 9 9955HX3D
- FL1
Process Node
- AMD Ryzen 9 7945HX
- 5 nm
- AMD Ryzen 9 9955HX3D
- TSMC 4nm FinFET
Total Cores
- AMD Ryzen 9 7945HX
- 16
- AMD Ryzen 9 9955HX3D
- 16
Performance Cores
- AMD Ryzen 9 7945HX
- 16
- AMD Ryzen 9 9955HX3D
- 16
Efficiency Cores
- AMD Ryzen 9 7945HX
- 0
- AMD Ryzen 9 9955HX3D
- 0
Total Threads
- AMD Ryzen 9 7945HX
- 32
- AMD Ryzen 9 9955HX3D
- 32
SMT Enabled
- AMD Ryzen 9 7945HX
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
P-Core Base Clock
- AMD Ryzen 9 7945HX
- 2.5 GHz
- AMD Ryzen 9 9955HX3D
- 2.5 GHz
P-Core Boost Clock
- AMD Ryzen 9 7945HX
- 5.4 GHz
- AMD Ryzen 9 9955HX3D
- 5.4 GHz
L3 Cache
- AMD Ryzen 9 7945HX
- 64 MB-50%
- AMD Ryzen 9 9955HX3D
- 128 MBBest
Base Power
- AMD Ryzen 9 7945HX
- 55 W
- AMD Ryzen 9 9955HX3D
- 55-75W
Memory Type
- AMD Ryzen 9 7945HX
- DDR5
- AMD Ryzen 9 9955HX3D
- DDR5, 2-Channel
Integrated Graphics
- AMD Ryzen 9 7945HX
- Yes
- AMD Ryzen 9 9955HX3D
- Yes
Benchmarks
- 3D Rendering
Blender Cycles (CPU)
- AMD Ryzen 9 7945HX
- 486-7%
- AMD Ryzen 9 9955HX3D
- 522Best
Renders a fixed 3D scene on the processor using every core, from the public Blender Open Data results.
This is the clearest all-core test on the page. The gap tracks core count and sustained clocks fairly closely, so it is the best guide to render, export and compile times. It says nothing about gaming.
Which one should you pick?
Choose 7945HX 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) and the higher blender cycles (CPU) (522 vs 486).
Verdict
AMD Ryzen 9 7945HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 7945HX 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.