Intel Core i5-12400 Desktop Processor 18M Cache, vs Intel Core Ultra 9 Desktop Processor 285K - 24
Updated August 2026 — Intel Core i5-12400 Desktop Processor 18M Cache, wins on price and power, Intel Core Ultra 9 Desktop Processor 285K - 24 wins on performance and graphics.
The Intel Core Ultra 9 offers superior performance and capabilities compared to the Intel Core i5-12400, making it the better choice for demanding tasks.
Why Intel Core i5-12400 Desktop Processor 18M Cache, is better
Price
Intel Core i5-12400 is significantly cheaper.
Power Consumption
Lower base power rating of 65W.
Compatibility
Compatible with Intel 600 series motherboards.
Why Intel Core Ultra 9 Desktop Processor 285K - 24 is better
Performance
Higher boost clock of 5.7 GHz.
Cores
24 cores compared to 6 cores.
Cache Size
40 MB cache versus 18 MB cache.
Overall score
Specifications
| Spec | Intel Core i5-12400 Desktop Processor 18M Cache, | Intel Core Ultra 9 Desktop Processor 285K - 24 |
|---|---|---|
| Base Clock | 2.50 GHz | Base Clock: 3.0 GHz |
| Boost Clock | 4.40 GHz | 5.7 GHz |
| Cores | 6 | 24 |
| Threads | 12 | 24 |
| Cache | 18 MB | 40 MB |
Dimension comparison
Overview of Intel Core i5-12400
The Intel Core i5-12400 is a solid mid-range processor priced at $214.99. It features a base clock speed of 2.50 GHz that can boost up to 4.40 GHz, making it well-suited for gamers and productivity tasks alike. With 18 MB of L3 cache, this processor is designed to handle routine data efficiently, ensuring smooth performance for various applications. Its built-in Intel UHD Graphics 730 controller supports up to four monitors, enhancing visual quality for users who require multiple displays.
Overview of Intel Core Ultra 9
In contrast, the Intel Core Ultra 9 is a high-end processor that comes with a significantly higher price tag of $557.00. This processor boasts an impressive 24 cores (8 performance cores and 16 efficiency cores) and can reach speeds of up to 5.7 GHz when unlocked. With 40 MB of cache, it is engineered for demanding tasks, making it ideal for serious creators and enthusiast gamers. Additionally, it integrates advanced performance hybrid architecture, which optimizes workload distribution for enhanced efficiency.
Performance Comparison
When it comes to performance, the Intel Core Ultra 9 outshines the i5-12400 by a considerable margin. The Ultra 9’s maximum boost clock of 5.7 GHz is about 30% higher than the i5-12400’s 4.40 GHz, allowing for faster processing in demanding applications. Moreover, with 24 cores compared to the i5-12400's 6 cores, the Ultra 9 is more capable of handling multitasking and heavy workloads. This makes the Ultra 9 a better choice for users who require top-tier performance for tasks such as video editing or 3D rendering.
Power Consumption
Power consumption is another area where these two processors differ. The Intel Core i5-12400 has a base power rating of 65W, while the Ultra 9 has a higher base power rating of 125W. This means that while the i5-12400 is more energy-efficient, the Ultra 9 offers significantly higher performance at the cost of increased power consumption. Users who prioritize energy savings might lean towards the i5-12400, while those focused on raw performance may find the Ultra 9 worth the extra power draw.
Compatibility
Both processors have specific compatibility requirements that users should consider. The Intel Core i5-12400 is compatible with Intel 600 series chipset-based motherboards, while the Intel Core Ultra 9 requires Intel 800 series chipset-based motherboards. This could impact users’ upgrade paths or choices when building a new system. It’s essential to ensure that the motherboard is compatible with the chosen processor to avoid additional costs and complications during installation.
Graphics Capabilities
In terms of graphics capabilities, the i5-12400 comes with integrated Intel UHD Graphics 730, which is suitable for everyday tasks and light gaming. However, the Ultra 9 also includes integrated graphics that are optimized for performance, making it a better option for users who may not want to invest in a separate graphics card. While both processors support PCIe 5.0 and 4.0, the Ultra 9’s capabilities allow for enhanced performance in graphics-intensive applications, providing a more robust experience for gamers and creators.
Price Comparison
The price difference between the two processors is significant. At $214.99, the Intel Core i5-12400 is about 61% cheaper than the Intel Core Ultra 9, which is priced at $557.00. This price gap may influence a buyer’s decision, especially for those on a budget who need a reliable processor without the need for ultra-high performance. However, for users who require the increased capabilities of the Ultra 9, the investment could be justified based on the enhanced performance and efficiency.
Which should you buy?
Choosing between the Intel Core i5-12400 and the Intel Core Ultra 9 depends on your specific needs and budget. If you’re looking for a cost-effective solution that delivers solid performance for everyday tasks and light gaming, the i5-12400 is an excellent choice. However, if you require top-tier performance for demanding applications, multitasking capabilities, and are willing to pay a premium, the Ultra 9 is the better option. Ultimately, your decision should align with your performance requirements, power consumption preferences, and budget constraints.

