This article covers INTEL Core Ultra5 245K プロセッサー BX80768245K.

Overview

Intel's Core Ultra 5 245K is a mid-high range desktop CPU from the Arrow Lake generation, designed for users who want a solid balance of performance and power efficiency. It features 14 cores (6 P-cores + 8 E-cores) with 14 threads, a base clock of 4.2GHz, and a maximum turbo boost of 5.2GHz. The 24MB L2 cache and 26MB L3 cache ensure snappy data access in everyday tasks and gaming. With a TDP of 125W (maximum 159W), this CPU runs relatively cool, making it a good fit for systems where noise and heat are concerns. It also includes an integrated NPU (Neural Processing Unit), enabling local AI processing such as Windows Studio Effects without relying on a dedicated GPU. The -exclusive version adds an extra year of distributor warranty on top of the standard 3-year manufacturer warranty, giving first-time builders extra peace of mind. At around ¥41,000 in Japan, it competes directly with AMD's Ryzen 5 and Ryzen 7 offerings.

Compatibility Guide

The Core Ultra 5 245K uses the new LGA1851 socket, so you'll need an Intel 800-series chipset motherboard (Z890 or B860). It supports DDR5-5600 natively and can handle faster overclocked memory. PCIe 5.0 is supported directly from the CPU for the latest GPUs and NVMe SSDs. A separate CPU cooler is required — no cooler is included in the box. For the 159W peak TDP, a mid-range air cooler or 240mm AIO liquid cooler is recommended. A power supply of 650W or higher is advisable for a full build with a mid-range graphics card.

Product Info

Launched in October 2024, the Core Ultra 5 245K is positioned as a mid-high range CPU in Intel's lineup. It sits below the Core Ultra 7 and Core Ultra 9 models, offering a compelling price-to-performance ratio for mainstream users. The -exclusive bundle provides a total of 4 years of warranty (3 years manufacturer + 1 year distributor). Key performance numbers include 14 cores/14 threads, a 5.2GHz boost clock, and built-in NPU for AI workloads. The CPU supports Intel's latest Platform Controller Hub (PCH) and integrates Thunderbolt 4 and Wi-Fi 7 support via compatible motherboards.

Best Use Cases

Casual Gamers and Daily Users: The 6 P-cores deliver strong single-threaded performance for most games, while the E-cores handle background tasks efficiently. It's an ideal upgrade from older Core i5 or i7 CPUs. Low-Power Builds: The 125W TDP makes it suitable for quiet or compact PC builds where cooling options are limited. Pairing it with a mid-range GPU creates a balanced, power-efficient system. * AI-Curious Beginners: Thanks to the integrated NPU, you can experiment with local AI features without needing a high-end graphics card. This makes the 245K a future-friendly choice for early adopters of on-device AI. ## Alternatives
Direct competitors include the AMD Ryzen 5 9600X (6 cores, 12 threads) and Ryzen 7 9700X (8 cores, 16 threads). The Core Ultra 5 245K offers more total cores but trails in single-threaded performance compared to the Ryzen 7 9700X. The Ryzen 5 9600X is cheaper (around ¥33,000) and uses the AM5 platform with long-term upgrade support, whereas LGA1851 is new and its upgrade path is uncertain. Consider your budget and future plans before deciding.

Things to Consider

Since LGA1851 is a brand new socket, you cannot reuse older Intel motherboards (LGA1700 or earlier). Make sure to purchase a compatible Z890 or B860 board. Also, no CPU cooler is included — you must buy one separately. While 14 cores sound impressive for the price, the E-cores are not as powerful as the P-cores. For heavy multi-threaded tasks like video rendering or 3D modeling, a Ryzen 7 9700X or Intel Core Ultra 7 265K may deliver better results. The 245K is best suited for users whose primary workload is gaming, browsing, and light productivity.

Product Disclosure (Amazon)

  • Manufacturer: インテル(Intel)
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0DJQ7PZ67
  • Note: This article covers a manufacturer-made product based on Amazon listing details.