15 specifications

Intel Core i5-12600K vs Intel Core i9-10900K

On paper, the Intel Core i9-10900K 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.

10 specifications · 2 with a higher side

Full specifications

Intel Core i5-12600K

Intel · Alder Lake (12th gen) · Desktop

Full specifications

Intel Core i9-10900K

Intel · Comet Lake (10th gen) · Desktop

Cores and clocks

Cores

Threads

Base clock

3.7 GHz

Boost clock

4.9 GHz

5.3 GHz

Cache and power

L3 cache

20 MB

TDP

125 W

Platform

Socket

FCLGA1700

FCLGA1200

Process

Not verified

14 nm

Integrated graphics

Intel UHD Graphics 770

Intel UHD Graphics 630

Launched

2021-11-04

2020-04

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.

A year apart

The Core i5-12600K (Alder Lake (12th gen), 2021) is a year newer than the Core i9-10900K (Comet Lake (10th gen), 2020). That matters more than any single row in the table, because a newer design usually does more work in each clock cycle. Clock speeds are only a fair comparison between chips of the same generation; across generations, a lower number on the newer chip can still be the faster core.

Cores and threads

The Core i9-10900K has 10 cores and 20 threads against 10 and 16. 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 i9-10900K boosts to 5.3 GHz against 4.9 GHz, 8 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 125 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

They use different sockets, FCLGA1700 and FCLGA1200, 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, FCLGA1200 takes DDR4. 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 i9-10900K; 20 threads against 16. 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.

Free CPU stress test

Questions

Is the Core i5-12600K better than the Core i9-10900K?: By need, on the specifications: rendering, compiling, video export: the Core i9-10900K. 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 i5-12600K and the Core i9-10900K use the same socket?: No. The Core i5-12600K uses FCLGA1700 and the Core i9-10900K uses FCLGA1200, so switching means a new motherboard and new memory.
Does the Core i5-12600K or the Core i9-10900K have integrated graphics?: Both do: Intel UHD Graphics 770 on the Core i5-12600K and Intel UHD Graphics 630 on the Core i9-10900K.

More comparisons

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.

Run the test on your machine How we measure →