Processors/AMD Ryzen 9 9955HX
AMD · Ryzen 9000HX (Fire Range, Zen 5) · Laptop
AMD Ryzen 9 9955HX
The AMD Ryzen 9 9955HX is AMD’s Ryzen 9000HX (Fire Range, Zen 5) mobile processor with 16 cores and 32 threads, a boost clock of 5.4 GHz and 64 MB of L3 cache.
Drawn from this part’s own specifications. No openly-licensed photograph of the AMD Ryzen 9 9955HX exists, so this is an illustration rather than a photograph.
Overview
The AMD Ryzen 9 9955HX is AMD’s Ryzen 9000HX (Fire Range, Zen 5) mobile processor with 16 cores and 32 threads, a boost clock of 5.4 GHz and 64 MB of L3 cache. These are the manufacturer’s published figures. They describe what the chip is designed to do, not what your particular machine does with it, and the gap between those two is usually cooling. A boost clock is a ceiling rather than a promise, and how long a processor holds it under continuous load is the one thing no specification sheet can tell you.
Specifications
- Cores
- 16
- Threads
- 32
- Base clock
- 2.5 GHz
- Boost clock
- 5.4 GHz
- L3 cache
- 64 MB
- TDP
- 55 to 75 W
- Total cache (L2 + L3)
- 80 MB
- Socket
- FL1
- Process
- 4 nm
- Integrated graphics
- AMD Radeon 610M graphics
- Launched
- Not verified
Physical cores. More helps sustained multi-threaded work, not single-task responsiveness.
The floor the vendor guarantees under load. Often closer to reality than boost.
A ceiling, not a promise. How long a chip holds it is the thing a spec sheet cannot tell you.
Design power, not measured draw. Where a range is shown, the manufacturer allows the laptop maker to choose within it, and the choice materially changes sustained performance.
AMD prints L2 and L3 together. It is not the L3 figure and is not compared with one.
Sources
Each figure, the label its source printed beside it, and the day it was read.
| Figure | As printed | Source | Checked |
|---|---|---|---|
| Cores16 | Cores / Threads | ir.amd.comLaunch release | |
| Threads32 | Cores / Threads | ir.amd.comLaunch release | |
| Base clock2.5 GHz | Boost / Base Frequency | ir.amd.comLaunch release | |
| Boost clock5.4 GHz | Boost / Base Frequency | ir.amd.comLaunch release | |
| L3 cache64 MB | L3 Cache | amd.comSpecification page | |
| TDP55 to 75 W | cTDP | ir.amd.comLaunch release | |
| Total cache (L2 + L3)80 MB | Total Cache | ir.amd.comLaunch release | |
| SocketFL1 | CPU Socket | amd.comSpecification page | |
| Process4 nm | Processor Technology for CPU Cores | amd.comSpecification page | |
| Integrated graphicsAMD Radeon 610M graphics | Graphics Model | ir.amd.comLaunch release |
Measured on SystemCheck: not enough runs yet. Run the test to add yours.
Compare
The 6 nearest processors in the same segment, each with a published side-by-side.
Other processors in AMD Ryzen 9000HX (Fire Range, Zen 5)
What these numbers mean
Every figure on this sheet is a design target. None of it is a measurement.
Nothing above describes how a processor behaves twenty minutes into a sustained workload, which is where two chips with nearly identical specifications routinely diverge. A boost clock is a ceiling the vendor permits, not a rate the chip sustains, and whether it holds depends on the cooling, the case, the power profile and the room. None of those appear on a specification sheet.
We deliberately do not reduce these figures to a single score. A composite invented from specifications would look authoritative and measure nothing, and choosing the weights would be choosing the winner.