This article covers Intel Core i9 i9-9900K オクタコア [8コア] 3.60 GHz プロセッサー.

Overview

The Intel Core i9-9900K was the flagship of Intel's 9th generation Core processors, launched in 2018. It features 8 cores and 16 threads with a maximum boost clock of 5.0 GHz, making it the highest-performing desktop CPU at the time for both single-threaded and multi-threaded workloads. Built on the 14nm++ process, it has a TDP of 95W and includes integrated Intel UHD Graphics 630. This CPU was positioned as a high-end solution for gaming and creative work, excelling especially in high-refresh-rate gaming scenarios. It outperformed its competitor, the AMD Ryzen 7 2700X, in single-threaded tasks. However, it has since been surpassed by newer generations (12th Gen Intel and Ryzen 5000 series), and is no longer recommended for new builds unless you already own a compatible LGA1151 motherboard.

Compatibility Guide

The Core i9-9900K uses the LGA1151 socket (9th Gen compatible). It works with Intel 300-series chipsets, primarily Z390, Z370, H370, B365, and B360. Some chipsets like Z370 may require a BIOS update. Memory support is dual-channel DDR4-2666, up to 128GB. Power requirements: while the TDP is 95W, real-world power draw can exceed 200W under heavy load. A quality 850W power supply is recommended, especially if overclocking. PCIe 3.0 is the maximum supported; PCIe 4.0/5.0 are not available. Storage interfaces include SATA 6Gb/s and M.2 PCIe 3.0 x4.

Product Info

The Intel Core i9-9900K launched in October 2018 with an MSRP of around $488. Today, it is available through second-hand markets or clearance sales. Intel provides a standard 3-year warranty. This CPU was the top-tier offering in the 9th Gen lineup, built on 14nm with 8 cores, 16 threads, and 16MB of L3 cache.

Best Use Cases

High-refresh-rate gamers: Ideal for 1080p or 1440p gaming at 144Hz+, especially in esports titles. Single-thread performance is still respectable, but modern AAA games may cause CPU bottlenecks. Budget-conscious creators: For video editing or 3D rendering on a tight budget, the 9900K offers decent multi-threaded performance at a low second-hand price. However, newer CPUs encode faster. * LGA1151 platform upgraders: If you already own a Z370 or Z390 motherboard, upgrading from an i7-8700K to a 9900K can provide a meaningful performance boost without replacing the motherboard.

Things to Consider

This CPU is now outdated. It lacks PCIe 4.0 support, so you won't get the full speed from modern GPUs or NVMe SSDs. It also does not support DDR5 memory. For a new build, consider a 12th Gen Intel or Ryzen 5000/7000 series CPU instead. Overclocking requires a robust cooler—either a high-end air cooler or a 240mm+ liquid cooler. Motherboard VRM quality matters; cheap boards may throttle under sustained load. When buying used, inspect the CPU for bent pins or damage. ## FAQ
Q: Is the Core i9-9900K still good for gaming in 2026? A: It can handle many games, especially older titles and esports. But in demanding AAA games, you may experience CPU bottlenecks, resulting in lower and less stable frame rates compared to modern CPUs. Q: Which motherboard works best with the 9900K? A: A Z390 motherboard is ideal for full overclocking support. Z370 works with a BIOS update, but B360/H370 do not support overclocking. Q: How does the 9900K compare to the Ryzen 7 5800X? A: The Ryzen 7 5800X outperforms the 9900K in both single and multi-threaded tasks, supports PCIe 4.0, and is more power-efficient. For a new build, the 5800X is a better choice.

Product Disclosure (Amazon)

  • Manufacturer: インテル
  • Seller: DEW TREE
  • Fulfilled by: DEW TREE
  • ASIN: B07KC6V4YF
  • Note: This article covers a manufacturer-made product based on Amazon listing details.