Intel Core i7-8700K Desktop Processor 6 Cores up vs Intel® Core™ Ultra 5 Processor 250KF Plus 18 cores
Updated August 2026 — Intel Core i7-8700K Desktop Processor 6 Cores up wins on power and gaming, Intel® Core™ Ultra 5 Processor 250KF Plus 18 cores wins on compatibility and performance.
The Intel® Core™ Ultra 5 Processor 250KF Plus outperforms the Intel Core i7-8700K in core count and modern features, making it the better choice for demanding tasks.
Why Intel Core i7-8700K Desktop Processor 6 Cores up is better
Price
i7-8700K is cheaper by $55
Gaming
i7-8700K is optimized for casual gaming
Power Consumption
i7-8700K has lower base power at 95W
Why Intel® Core™ Ultra 5 Processor 250KF Plus 18 cores is better
Performance
Ultra 5 has 18 cores vs 6 cores
Compatibility
Ultra 5 supports PCIe 5.0 and DDR5
Turbo Speed
Ultra 5 boosts up to 5.3 GHz vs 4.7 GHz
Overall score
Specifications
| Spec | Intel Core i7-8700K Desktop Processor 6 Cores up | Intel® Core™ Ultra 5 Processor 250KF Plus 18 cores |
|---|---|---|
| Cores | 6 | 18 |
| Max Turbo | 4.7 GHz | 5.3 GHz |
| Base Power | 95W | 125W |
| Cache | 12 MB | Not specified |
| Socket | LGA1151 | LGA1851 |
Dimension comparison
Overview of the Intel Core i7-8700K and Intel® Core™ Ultra 5 Processor 250KF Plus
The Intel Core i7-8700K is priced at $185.37, while the Intel® Core™ Ultra 5 Processor 250KF Plus comes in at $240.58, making the i7-8700K approximately 23% cheaper than the Ultra 5. Both processors are designed for different user bases, with the i7-8700K appealing primarily to gamers and the Ultra 5 targeting enthusiasts and creators who demand high performance.
Performance Comparison
The Intel Core i7-8700K features 6 cores and can boost up to 4.7 GHz, offering solid performance for gaming and basic multi-threaded tasks. In contrast, the Intel® Core™ Ultra 5 Processor 250KF Plus has 18 cores, composed of 6 performance cores (P-cores) and 12 efficiency cores (E-cores), reaching a max turbo frequency of 5.3 GHz. This significant increase in cores and clock speed suggests that the Ultra 5 is better suited for demanding tasks like video editing and 3D rendering, while the i7-8700K holds its ground for less intensive gaming scenarios.
Compatibility and Motherboard Support
The Intel Core i7-8700K is compatible only with Intel 300 Series chipsets, which may limit upgrade options for users looking to future-proof their builds. On the other hand, the Ultra 5 is designed for the next-gen Intel 800 Series chipsets, allowing for PCIe 5.0 and DDR5 memory support. This modern compatibility ensures that users of the Ultra 5 can take advantage of the latest technology, making it a more future-ready choice for enthusiasts.
Gaming Experience
Intel Core i7-8700K is well-recognized for providing outstanding gaming experiences, especially when considering its dedicated Intel UHD Graphics 630. This makes the i7-8700K an attractive option for casual gamers who may not need discrete graphics. Conversely, the Intel® Core™ Ultra 5 Processor 250KF Plus is designed for users who require discrete graphics and is optimized for high-performance gaming. The Ultra 5's higher core count and boost clock make it a formidable choice for competitive gaming, where frame rates and responsiveness are paramount.
Power Consumption and Thermal Design
The Intel Core i7-8700K operates at a base power of 95W, which is reasonable for most gaming setups. In comparison, the Ultra 5 has a more robust power design with a base power of 125W and a max turbo power of 250W. This means that while the Ultra 5 can deliver superior performance, it also demands more from your power supply and cooling solutions. Users looking to overclock or push their systems to the limits will need to consider these power requirements seriously.
Price and Value Proposition
At $185.37, the Intel Core i7-8700K offers excellent value for gamers looking for a reliable processor without breaking the bank. In contrast, at $240.58, the Intel® Core™ Ultra 5 Processor 250KF Plus represents a higher initial investment, but this may be justified for those who require the additional cores and modern features. The price difference of about $55 reflects the performance capabilities and future-proofing benefits that the Ultra 5 provides, making it a more suitable choice for power users.
User Target and Application
The Intel Core i7-8700K is primarily aimed at gamers and casual users who want solid performance without the need for extensive multitasking capabilities. It is an excellent choice for those who engage in gaming and some light content creation. On the other hand, the Intel® Core™ Ultra 5 Processor 250KF Plus is tailored for enthusiasts and professionals who need to run demanding applications and multitask effectively. Its higher core count and advanced features make it ideal for creators who rely on high-performance computing.
Which should you buy?
Choosing between the Intel Core i7-8700K and the Intel® Core™ Ultra 5 Processor 250KF Plus ultimately depends on your specific needs. If you're a gamer on a budget looking for reliable performance, the i7-8700K is an excellent choice at $185.37. However, if you demand more processing power for content creation or multitasking, the Ultra 5 at $240.58 is worth the investment due to its higher core count and modern compatibility. Evaluate your usage requirements and future-proofing needs to make the best choice for your build.

