Processors/Comparison
15 specifications
Intel Core i9-14900HX vs Intel Core Ultra 9 285HX
On paper, the Intel Core i9-14900HX boosts higher. 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 i9-14900HX
Intel · Raptor Lake Refresh HX (14th gen mobile) · Laptop
Intel Core Ultra 9 285HX
Intel · Core Ultra 200HX (Arrow Lake) · 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 i9-14900HX has 24 cores and 32 threads against 24 and 24. 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.
Boost clock
The Core i9-14900HX boosts to 5.8 GHz against 5.5 GHz, 5 percent higher. Across generations it is not a guide to speed on its own, for the reason above. Boost is also a peak: it is held for seconds to minutes, on one or two cores, while the cooling and the power limit allow. What either chip settles at under a long load is lower, and it depends on the cooler and the motherboard as much as the chip.
Power and cooling
Both are rated at 55 W, so they ask the same of a cooler and a power supply. The rating is the heat to be moved for the chip to hold its speed; both draw above it in short bursts, and either one slows down rather than fails when the cooling falls short.
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
- Rendering, compiling, video export
- Core i9-14900HX
- 32 threads against 24. Work that uses every thread scales with how many there are.
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 i9-14900HX better than the Core Ultra 9 285HX?
- By need, on the specifications: rendering, compiling, video export: the Core i9-14900HX. 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 i9-14900HX and the Core Ultra 9 285HX use the same socket?
- Laptop processors are soldered in place, so neither can be swapped for the other.
- Does the Core i9-14900HX or the Core Ultra 9 285HX have integrated graphics?
- Both do: Intel UHD Graphics for 14th Gen Intel Processors on the Core i9-14900HX and Intel Graphics on the Core Ultra 9 285HX.
More comparisons
- Intel Core i9-14900HX vs Intel Core Ultra 9 290HX Plus
- Intel Core i9-14900HX vs Intel Core i9-13900HX
- Intel Core i9-14900HX vs Intel Core Ultra 9 275HX
- Intel Core i9-14900HX vs AMD Ryzen 9 9955HX3D
- Intel Core i9-14900HX vs Intel Core i7-14700HX
- Intel Core Ultra 9 285HX vs Intel Core Ultra 9 290HX Plus
- Intel Core Ultra 9 285HX vs Intel Core i9-13900HX
- Intel Core Ultra 9 285HX vs Intel Core Ultra 9 275HX
- Intel Core Ultra 9 285HX vs AMD Ryzen 9 9955HX3D
- Intel Core Ultra 9 285HX vs Intel Core i7-14700HX
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.