Intel Core i9-12900KF processor LGA 1700, 16 cores, up to 5.2 GHz, Box

Alder Lake processors combine two types of cores. Eight Performance cores (P-cores) support Hyper-Threading and handle the game or other foreground work. Eight Efficient cores (E-cores) take care of background tasks such as the browser, chat apps and downloads. Intel Thread Director gives the operating system hints about which task belongs on which core, so demanding work does not have to share resources with the background.

The P-cores run at a 3.2 GHz base clock and boost up to 5.1 GHz. Turbo Boost Max 3.0 picks out the strongest cores and pushes them to 5.2 GHz – in many games it is single-core speed that sets the frame rate when the processor is the limit. The E-cores run between 2.4 and 3.9 GHz. The 30 MB Smart Cache is shared by all cores and allocated dynamically where it is needed.

The F in the model name means the processor has no integrated graphics, and the manufacturer data confirms it. The picture always comes from a separate graphics card, and the monitor plugs into the card rather than the motherboard outputs. A gaming PC or creator workstation has a graphics card anyway, so nothing is lost. When building or troubleshooting, though, keep in mind that without a working card there is no image at all.

The memory controller supports both DDR4 and DDR5 in dual-channel mode, up to 128 GB in total with bandwidth of up to 76.8 GB/s. Which type you use is decided by the motherboard. The processor provides 20 PCI Express lanes in versions 5.0 and 4.0, configured as 1 × 16 + 1 × 4 or 2 × 8 + 1 × 4, so the graphics card gets a full-width link and an NVMe SSD gets lanes of its own.

Base power is 125 W, but in turbo mode consumption can rise to 241 W. The maximum junction temperature is 100 °C and the thermal solution specification is PCG 2020A. To hold high clocks under sustained load you need a capable tower or liquid cooler and a well-ventilated case, otherwise the clocks drop quickly. Keep the turbo power in mind when choosing the power supply as well.

Gaming PC builders who fit a separate graphics card and want high single-core clocks; streamers and video editors who get headroom for rendering and encoding from 24 threads; developers who run several virtual machines with VT-x and VT-d; and owners of an LGA 1700 platform who want to make their existing computer more powerful.