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Intel® Core™ Ultra 5 Processor 250K Plus 18 cores vs Intel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11

Updated August 2026The Intel® Core™ Ultra 5 Processor 250K Plus outperforms the Intel Core I9-9900K in core count, turbo frequency, and price, making it the better choice for high-performance computing.

The Intel® Core™ Ultra 5 Processor 250K Plus outperforms the Intel Core I9-9900K in core count, turbo frequency, and price, making it the better choice for high-performance computing.

Why Intel® Core™ Ultra 5 Processor 250K Plus 18 cores is better

core count

Ultra 5 has 18 cores vs I9's 8 cores

turbo frequency

Ultra 5 reaches 5.5 GHz vs I9's 5.0 GHz

price

Ultra 5 costs C$332.99 vs I9's C$678.88

Why Intel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11 is better

brand loyalty

I9 is a well-established product

integrated graphics

I9 includes Intel UHD Graphics 630

compatibility

I9 is compatible with Intel 300 Series motherboards

Overall score

Intel® Core™ Ultra 5 Processor 250K Plus 18 cores
90
Intel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11
70

Specifications

SpecIntel® Core™ Ultra 5 Processor 250K Plus 18 coresIntel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11
Core Count18 cores8 cores
Turbo Frequency5.5 GHz5.0 GHz
Base Power125W95W
Max Power250W95W
SocketLGA1851LGA1151

Dimension comparison

Intel® Core™ Ultra 5 Processor 250K Plus 18 coresIntel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11

Pricing Comparison

The Intel® Core™ Ultra 5 Processor 250K Plus is priced at C$332.99, making it significantly more affordable than the Intel Core I9-9900K, which retails for C$678.88. This represents a price difference of C$345.89. For budget-conscious consumers or those who do not require top-tier performance, the Ultra 5 Processor offers an attractive entry point into high-performance computing without breaking the bank.

Core and Thread Count

The Intel® Core™ Ultra 5 Processor 250K Plus features an impressive core count of 18 cores, which includes 8 performance cores and 16 efficient cores. In contrast, the Intel Core I9-9900K has 8 cores and supports 16 threads. This means that the Ultra 5 Processor provides more than double the core count compared to the I9-9900K, making it a more suitable option for demanding gaming and productivity tasks that require multitasking capabilities.

Performance Capabilities

In terms of performance, the Intel® Core™ Ultra 5 Processor 250K Plus boasts a maximum turbo frequency of 5.5 GHz. This is higher than the Intel Core I9-9900K, which reaches up to 5.0 GHz. The additional 0.5 GHz in turbo frequency can translate to better responsiveness during high-intensity tasks, such as gaming or content creation. This performance edge is vital for enthusiasts looking for the best possible experience in resource-heavy applications.

Platform Support

The Intel® Core™ Ultra 5 Processor 250K Plus supports the latest technologies, including PCIe 5.0 and DDR5 memory, allowing for faster data transfer and improved memory performance. It is compatible with Intel 800 Series Chipset-based motherboards, which are designed to take full advantage of these advancements. In contrast, the Intel Core I9-9900K is limited to Intel 300 Series Chipset motherboards and does not support the newer technologies, which may hinder upgrade potential in the future.

Thermal and Power Design

The Intel® Core™ Ultra 5 Processor 250K Plus is designed with a 125W base power and a maximum turbo power of 250W, enabling it to sustain high-performance levels during demanding tasks. This robust thermal design is particularly important for overclockers and power users who require stability under load. The Intel Core I9-9900K, while efficient, has a less dynamic power profile that may not sustain performance as effectively under extreme conditions, potentially leading to thermal throttling.

Graphics Capability

Both processors include integrated graphics, but the specifics differ. The Intel Core I9-9900K features Intel UHD Graphics 630, which is suitable for basic gaming and multimedia tasks. The Intel® Core™ Ultra 5 Processor 250K Plus does not specify integrated graphics capabilities in the provided data, suggesting users might need a dedicated graphics card for optimal gaming performance. This could be a consideration for users who prefer to rely on integrated solutions for lighter tasks.

Target Audience

The Intel® Core™ Ultra 5 Processor 250K Plus is built with enthusiasts in mind, offering features such as unlocked performance tuning when paired with Intel Z-series chipsets. This makes it ideal for overclockers looking to push their systems to the limit. Conversely, while the Intel Core I9-9900K has its own set of features that appeal to gamers and professionals, its higher price and lower core count may attract a different segment of users who prioritize brand loyalty or specific application compatibility.

Which should you buy?

When deciding between the Intel® Core™ Ultra 5 Processor 250K Plus and the Intel Core I9-9900K, the choice ultimately hinges on your computing needs and budget. The Ultra 5 Processor offers superior core counts, higher turbo frequencies, and support for the latest technologies at a significantly lower price of C$332.99. If you seek a processor for demanding applications and gaming, the Ultra 5 is the clear winner. However, if you are already invested in the Intel 300 Series ecosystem, the I9-9900K may still serve you well.

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Intel® Core™ Ultra 5 Processor 250K Plus 18 cores vs Intel Core I9-9900K Desktop Processor 8 Cores Up to 5.0 GHz Turbo Unlocked LGA11 | versusfinder