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AMD Ryzen 9 8945HX vs AMD Ryzen 9 9955HX: Comparison
Ryzen 9 8945HX vs Ryzen 9 9955HX microarchitecture compared
They are built to different briefs, and microarchitecture shows it, Ryzen 9 8945HX Zen 4 against Ryzen 9 9955HX Zen 5. Measured rather than claimed: in Geekbench 6 (Multi-Core) the Ryzen 9 9955HX returns 19,441 against 15,347, a 21% lead. There is a split on base power as well, 55 W on the Ryzen 9 8945HX versus 55-75W on the Ryzen 9 9955HX. They differ on memory type too, DDR5 on the Ryzen 9 8945HX versus DDR5, 2-Channel on the Ryzen 9 9955HX. On max memory speed there is little in it, 5200 MT/s on the Ryzen 9 8945HX versus 5600 MT/s on the Ryzen 9 9955HX. Max memory capacity is closer, 64 GB on the Ryzen 9 8945HX versus 96 GB on the Ryzen 9 9955HX. They differ on retail availability too, Soldered Only on the Ryzen 9 8945HX versus Tray OEM on the Ryzen 9 9955HX.
Ryzen 9 8945HX vs Ryzen 9 9955HX: which one fits your build
The Ryzen 9 8945HX 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. Buy the Ryzen 9 9955HX for gaming laptops and mobile content creation, though it is not the pick for thin-and-light ultraportables and all-day battery life needs. Our rating of the Ryzen 9 8945HX (8.5/10): the AMD Ryzen 9 8945HX 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.
What Ryzen 9 8945HX and Ryzen 9 9955HX 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 19 further specifications as well.
Frequently asked questions
Is the P-Core Base Clock the same on the Ryzen 9 8945HX and Ryzen 9 9955HX?
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 8945HX
- Laptop
- AMD Ryzen 9 9955HX
- Laptop
Codename
- AMD Ryzen 9 8945HX
- Dragon Range
- AMD Ryzen 9 9955HX
- Fire Range
Release Year
- AMD Ryzen 9 8945HX
- 2025
- AMD Ryzen 9 9955HX
- 2025
TDP
- AMD Ryzen 9 8945HX
- 55 W
- AMD Ryzen 9 9955HX
- 55 W
iGPU
- AMD Ryzen 9 8945HX
- AMD Radeon 610M
- AMD Ryzen 9 9955HX
- AMD Radeon 610M
Market Segment
- AMD Ryzen 9 8945HX
- Laptop
- AMD Ryzen 9 9955HX
- Laptop
Microarchitecture
- AMD Ryzen 9 8945HX
- Zen 4 (Dragon Range)
- AMD Ryzen 9 9955HX
- Zen 5 (Fire Range)
Socket
- AMD Ryzen 9 8945HX
- FL1
- AMD Ryzen 9 9955HX
- FL1
Process Node
- AMD Ryzen 9 8945HX
- 5 nm
- AMD Ryzen 9 9955HX
- TSMC 4nm FinFET
Total Cores
- AMD Ryzen 9 8945HX
- 16
- AMD Ryzen 9 9955HX
- 16
Performance Cores
- AMD Ryzen 9 8945HX
- 16
- AMD Ryzen 9 9955HX
- 16
Efficiency Cores
- AMD Ryzen 9 8945HX
- 0
- AMD Ryzen 9 9955HX
- 0
Total Threads
- AMD Ryzen 9 8945HX
- 32
- AMD Ryzen 9 9955HX
- 32
SMT Enabled
- AMD Ryzen 9 8945HX
- Yes
- AMD Ryzen 9 9955HX
- Yes
P-Core Base Clock
- AMD Ryzen 9 8945HX
- 2.5 GHz
- AMD Ryzen 9 9955HX
- 2.5 GHz
P-Core Boost Clock
- AMD Ryzen 9 8945HX
- 5.4 GHz
- AMD Ryzen 9 9955HX
- 5.4 GHz
Unlocked Multiplier
- AMD Ryzen 9 8945HX
- Yes
- AMD Ryzen 9 9955HX
- Yes
L2 Cache
- AMD Ryzen 9 8945HX
- 16 MB
- AMD Ryzen 9 9955HX
- 16 MB
L3 Cache
- AMD Ryzen 9 8945HX
- 64 MB
- AMD Ryzen 9 9955HX
- 64 MB
Base Power
- AMD Ryzen 9 8945HX
- 55 W
- AMD Ryzen 9 9955HX
- 55-75W
Max Turbo Power
- AMD Ryzen 9 8945HX
- 75 W
- AMD Ryzen 9 9955HX
- 75 W
Memory Type
- AMD Ryzen 9 8945HX
- DDR5
- AMD Ryzen 9 9955HX
- DDR5, 2-Channel
Max Memory Speed
- AMD Ryzen 9 8945HX
- 5200 MT/s
- AMD Ryzen 9 9955HX
- 5600 MT/sBest
Memory Channels
- AMD Ryzen 9 8945HX
- 2
- AMD Ryzen 9 9955HX
- 2
Max Memory Capacity
- AMD Ryzen 9 8945HX
- 64 GB
- AMD Ryzen 9 9955HX
- 96 GBBest
ECC Support
- AMD Ryzen 9 8945HX
- No
- AMD Ryzen 9 9955HX
- No
Integrated Graphics
- AMD Ryzen 9 8945HX
- Yes
- AMD Ryzen 9 9955HX
- Yes
iGPU Model
- AMD Ryzen 9 8945HX
- AMD Radeon 610M
- AMD Ryzen 9 9955HX
- AMD Radeon 610M
iGPU Compute Units
- AMD Ryzen 9 8945HX
- 2
- AMD Ryzen 9 9955HX
- 2
PCIe Generation
- AMD Ryzen 9 8945HX
- PCIe 5.0
- AMD Ryzen 9 9955HX
- PCIe 5.0
PCIe Lanes
- AMD Ryzen 9 8945HX
- 28
- AMD Ryzen 9 9955HX
- 28
Retail Availability
- AMD Ryzen 9 8945HX
- Soldered Only
- AMD Ryzen 9 9955HX
- Tray OEM
Benchmarks
- General CPU
Geekbench 6 (Multi-Core)
- AMD Ryzen 9 8945HX
- 15,347-21%
- AMD Ryzen 9 9955HX
- 19,441Best
Everyday tasks like photo editing, compression and compiling, run on all cores.
Geekbench 6 (Single-Core)
- AMD Ryzen 9 8945HX
- 2,747-16%
- AMD Ryzen 9 9955HX
- 3,252Best
The same everyday tasks on one core. Tracks how responsive the PC feels.
Which one should you pick?
Choose 8945HX if you want the higher L2 cache (16 MB vs 16 MB), the higher L3 cache (64 MB vs 64 MB) and the higher memory channels (2 vs 2).
Choose 9955HX if you want the higher geekbench 6 (Multi-Core) (19,441 vs 15,347) and the higher geekbench 6 (Single-Core) (3,252 vs 2,747).
Verdict
AMD Ryzen 9 8945HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 8945HX 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.