Processors/Comparison
15 specifications
Intel Core i9-13900KS vs Intel Core Ultra 7 270K Plus
On paper, the Intel Core i9-13900KS 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 i9-13900KS
Intel · Raptor Lake (13th gen) · Desktop
Intel Core Ultra 7 270K Plus
Intel · Arrow Lake Refresh (Core Ultra 200S Plus) · Desktop
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 i9-13900KS 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 i9-13900KS boosts to 6 GHz against 5.5 GHz, 9 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
The Core i9-13900KS is rated at 150 W against 125 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. A tower cooler or a liquid loop suits the Core i9-13900KS; the Core Ultra 7 270K Plus is easier to keep quiet and fits smaller cases. 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
They use different sockets, FCLGA1700 and FCLGA1851, so moving from one to the other means a new motherboard, and new memory as well: FCLGA1700 takes DDR4 or DDR5, depending on the motherboard, FCLGA1851 takes DDR5. For an upgrade, that cost belongs in the comparison; for a new build, the newer platform is the one with later chips still to come.
Which to pick, on paper
- Rendering, compiling, video export
- Core i9-13900KS
- 32 threads against 24. Work that uses every thread scales with how many there are.
- A quiet or compact build
- Core Ultra 7 270K Plus
- 125 W against 150 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 i9-13900KS better than the Core Ultra 7 270K Plus?
- By need, on the specifications: rendering, compiling, video export: the Core i9-13900KS; a quiet or compact build: the Core Ultra 7 270K Plus. 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 i9-13900KS and the Core Ultra 7 270K Plus use the same socket?
- No. The Core i9-13900KS uses FCLGA1700 and the Core Ultra 7 270K Plus uses FCLGA1851, so switching means a new motherboard and new memory.
- Does the Core i9-13900KS or the Core Ultra 7 270K Plus have integrated graphics?
- Both do: Intel UHD Graphics 770 on the Core i9-13900KS and Intel Graphics on the Core Ultra 7 270K Plus.
- Which runs hotter, the Core i9-13900KS or the Core Ultra 7 270K Plus?
- The Core i9-13900KS is rated at 150 W against 125 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 i9-13900KS vs Intel Core i9-14900K
- Intel Core i9-13900KS vs Intel Core i9-14900KF
- Intel Core i9-13900KS vs Intel Core i9-13900K
- Intel Core i9-13900KS vs Intel Core i9-14900
- Intel Core i9-13900KS vs Intel Core i9-14900F
- Intel Core i9-13900KS vs Intel Core i9-14900KS
- Intel Core Ultra 7 270K Plus vs Intel Core Ultra 9 285
- Intel Core Ultra 7 270K Plus vs Intel Core Ultra 9 285K
- Intel Core Ultra 7 270K Plus vs Intel Core i9-13900K
- Intel Core Ultra 7 270K Plus vs Intel Core i9-14900
- Intel Core Ultra 7 270K Plus vs Intel Core i9-14900F
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.