Intel Core i9-9900KF 3.6 GHz Eight-Core LGA 1151 Processor vs Intel Core i7-7700K 4.2 GHz QuadCore 8 MB Cache CPU - Black
Updated August 2026 — The Intel Core i9-9900KF outperforms the Intel Core i7-7700K in multitasking and demanding applications, making it the better choice for high-performance needs.
The Intel Core i9-9900KF outperforms the Intel Core i7-7700K in multitasking and demanding applications, making it the better choice for high-performance needs.
Why Intel Core i9-9900KF 3.6 GHz Eight-Core LGA 1151 Processor is better
Core Count
8 cores vs 4 cores
Turbo Frequency
5.0 GHz vs 4.2 GHz
Cache Size
16 MB vs 8 MB
Why Intel Core i7-7700K 4.2 GHz QuadCore 8 MB Cache CPU - Black is better
Base Clock Speed
4.2 GHz vs 3.6 GHz
4K Support
Supports 4K Ultra HD
Price
£265.00 vs £308.57
Overall score
Specifications
| Spec | Intel Core i9-9900KF 3.6 GHz Eight-Core LGA 1151 Processor | Intel Core i7-7700K 4.2 GHz QuadCore 8 MB Cache CPU - Black |
|---|---|---|
| Brand | Intel | Intel |
| Clock Speed | 3.6 GHz | 4.2 GHz |
| Max Turbo | 5.0 GHz | 4.2 GHz |
| Memory Support | DDR4-2666 | N/A |
| Integrated Graphics | Yes | Yes |
Dimension comparison
Overview of the Processors
The Intel Core i9-9900KF and the Intel Core i7-7700K are both high-performance CPUs from Intel, but they cater to different user needs. Priced at £265.00, the Intel Core i9-9900KF offers eight cores and sixteen threads, while the Intel Core i7-7700K, at £308.57, features a quad-core design. This distinction in core count and threading capabilities significantly impacts their performance in multitasking and demanding applications.
Performance Comparison
The Intel Core i9-9900KF operates at a base clock speed of 3.6 GHz, with a maximum turbo frequency of 5.0 GHz. This impressive speed, combined with its eight cores, allows it to excel in both single-threaded and multi-threaded tasks. In contrast, the Intel Core i7-7700K has a higher base clock speed of 4.2 GHz but only four cores, which can limit its performance in scenarios that benefit from more cores. Users looking for raw power in gaming and content creation may find the i9-9900KF more suited to their needs, particularly for tasks that leverage its higher core count.
Cache and Memory Support
The Intel Core i9-9900KF features 16 MB of cache memory, which enhances its performance by allowing quicker access to frequently used data. The Intel Core i7-7700K, while equipped with 8 MB of cache, may not match the i9-9900KF in terms of data retrieval speed, especially in memory-intensive applications. Furthermore, the i9-9900KF supports dual-channel DDR4-2666 memory and Intel Optane Memory, which may offer better overall system responsiveness compared to the i7-7700K’s more limited support. This difference in cache and memory capabilities could result in noticeable performance variations in demanding applications.
Graphics Capabilities
Both CPUs come with integrated graphics, but their performance may vary based on the intended use case. The Intel Core i9-9900KF is part of the Coffee Lake Refresh family and provides ample graphical performance for light gaming and multimedia tasks. The i7-7700K, with support for 4K Ultra HD resolutions, is also capable of impressive visual output, supporting up to 4096 x 2304 pixels across three independent displays. Users who need more robust graphical capabilities might find the i7-7700K appealing for its advanced display support, while the i9-9900KF offers a balanced performance with its graphical capabilities.
Target Audience
The Intel Core i9-9900KF is aimed at enthusiasts and professionals who require high performance for tasks such as video editing, 3D rendering, and gaming at high settings. Its eight cores and higher turbo frequency make it an attractive option for users who demand the best from their systems. Conversely, the Intel Core i7-7700K may appeal to gamers and casual users who need solid performance without the more significant investment required for the i9-9900KF. The price difference of £43.57 reflects this distinction in target audience and performance expectations.
Cooling Solutions
Cooling is essential for maintaining optimal performance in high-end CPUs. The Intel Core i9-9900KF comes bundled with a CPU cooler, which may be beneficial for users who want to ensure adequate cooling without additional costs. In contrast, the Intel Core i7-7700K does not specify a cooler in its package, which may require users to invest in a separate cooling solution to manage temperatures effectively. This difference can influence the overall cost and setup experience, especially for those who are not familiar with aftermarket cooling options.
Energy Efficiency
Energy consumption is an important factor for many users when selecting a CPU. The Intel Core i9-9900KF operates with a power consumption that reflects its higher performance capabilities. While specific power consumption figures are not provided, the higher clock speeds and core counts typically translate to increased power usage compared to the Intel Core i7-7700K, which, despite its lower performance, may provide more efficiency for basic tasks. Users concerned about energy costs may need to consider how often they will be pushing their CPU to its limits when making their choice.
Which should you buy?
Choosing between the Intel Core i9-9900KF and the Intel Core i7-7700K ultimately depends on your specific needs and budget. If you require superior performance for demanding applications, the i9-9900KF, priced at £265.00, offers a better core count and higher maximum turbo frequency, making it ideal for multitasking and gaming. However, if your focus is on enhanced graphics capabilities and you’re operating within a tighter budget, the i7-7700K, at £308.57, could serve you well, especially for 4K support. In essence, the right choice hinges on whether you prioritise performance or cost-effectiveness in your computing experience.
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