Processors/Comparison
15 specifications
Intel Core i9-13900HX vs AMD Ryzen 9 9955HX3D
On paper, the Intel Core i9-13900HX has more cores (24 against 16), and the AMD Ryzen 9 9955HX3D carries more L3 cache. Specifications describe what each chip is designed to do; how much of that either one holds under continuous load is a separate question.
Intel Core i9-13900HX
Intel · Raptor Lake-HX (13th Gen Core) · Laptop
AMD Ryzen 9 9955HX3D
AMD · Ryzen 9000HX (Fire Range, Zen 5) · Laptop
Cores and clocks
Cache and power
Platform
A check marks the higher figure only on rows where higher is unambiguously better. Rows without one are not ties; they are specifications where “better” has no meaning.
Reading the table
What the difference means.
Cores and threads
The Core i9-13900HX has 24 cores and 32 threads against 16 and 32. More threads help with work that can be split into many pieces at once: rendering, compiling, video export, running several heavy programs together. They do little for work that runs on a few threads, which includes most games and most everyday software, where the speed of one core decides the result.
Cache
The Ryzen 9 9955HX3D carries 128 MB of L3 cache against 36 MB. Cache is fast memory on the chip, and a larger one means the cores wait on main memory less often. The X3D parts stack extra cache on the die for exactly this reason, and games are the workload that responds to it most.
Power and cooling
The Ryzen 9 9955HX3D is rated at 75 W against 55 W. The rating is the heat the cooler has to move for the chip to hold its speed, and modern chips draw well above it in short bursts. In a laptop the maker chooses the real limit inside a range, so the same chip can behave like two different processors in two machines. That spread is what a sustained test measures and a specification sheet cannot. A chip whose cooling falls short does not fail. It slows down, and it does so after the first minute, which is why short benchmarks miss it.
Platform
Laptop processors are soldered to the board, so this is a choice between machines, not between chips you can swap. What differs between two laptops with these parts is mostly the power limit and the cooling the maker gave each one.
Which to pick, on paper
- Games first
- Ryzen 9 9955HX3D
- The stacked cache is aimed at games, which wait on memory more than most workloads.
- A quiet or compact build
- Core i9-13900HX
- 55 W against 75 W: less heat to move, so a smaller cooler and slower fans.
What no table says
How much of its speed a processor keeps after the first minute depends on the cooling and the power limit of the machine it is in. If you own one of these, measure it: the test is free and runs in this browser.
Questions
- Is the Core i9-13900HX better than the Ryzen 9 9955HX3D?
- By need, on the specifications: games first: the Ryzen 9 9955HX3D; a quiet or compact build: the Core i9-13900HX. No specification says how much speed either one keeps under a long load; that depends on the cooling and the power limit of the machine it is in, and it is what a sustained test measures.
- Do the Core i9-13900HX and the Ryzen 9 9955HX3D use the same socket?
- Laptop processors are soldered in place, so neither can be swapped for the other.
- Does the Core i9-13900HX or the Ryzen 9 9955HX3D have integrated graphics?
- Both do: Intel UHD Graphics for 13th Gen Intel Processors (32 EU) on the Core i9-13900HX and AMD Radeon 610M graphics on the Ryzen 9 9955HX3D.
- Which runs hotter, the Core i9-13900HX or the Ryzen 9 9955HX3D?
- The Ryzen 9 9955HX3D is rated at 75 W against 55 W, so it produces more heat under load and needs the larger cooler. How hot either one actually runs depends on the cooler and the case more than on the chip.
More comparisons
- Intel Core i9-13900HX vs Intel Core Ultra 9 275HX
- Intel Core i9-13900HX vs Intel Core Ultra 9 285HX
- Intel Core i9-13900HX vs Intel Core Ultra 9 290HX Plus
- Intel Core i9-13900HX vs Intel Core i9-14900HX
- Intel Core i9-13900HX vs Intel Core i7-14700HX
- AMD Ryzen 9 9955HX3D vs Intel Core i7-14700HX
- AMD Ryzen 9 9955HX3D vs Intel Core Ultra 9 275HX
- AMD Ryzen 9 9955HX3D vs Intel Core Ultra 9 285HX
- AMD Ryzen 9 9955HX3D vs Intel Core Ultra 9 290HX Plus
- AMD Ryzen 9 9955HX3D vs Intel Core Ultra 7 255HX
Every figure on this table 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.