Intel Core i7-6700K vs Intel Core i7-7700K

The Intel Core i7-6700K, based on the Skylake-S architecture, was introduced as a powerful desktop processor for demanding users and enthusiasts.

It aimed to provide high computing power for gaming and productivity applications. The Intel Core i7-7700K followed as part of the Kaby Lake-S generation and was also aimed at an audience seeking peak performance for gaming and content creation, representing an evolution of its predecessor.

Both CPUs are manufactured by Intel using the 14nm fabrication process. The Intel Core i7-6700K features 4 cores and 8 threads, enabling it to efficiently handle multiple tasks simultaneously. It is equipped with 8 MB of Level-3 cache and supports PCIe Version 3.0. The Intel Core i7-7700K retains the same core and thread count of 4 cores and 8 threads, also features 8 MB of Level-3 cache, and also utilizes PCIe Version 3.0.

In benchmarks, the Intel Core i7-7700K shows slightly higher single-core performance compared to the Intel Core i7-6700K. A boost in multi-core performance is also observed, with the Intel Core i7-7700K achieving noticeably better overall performance here. These improvements are due to optimizations within the Kaby Lake architecture, which allowed for higher clock speeds and efficiency.

For gaming scenarios, the Intel Core i7-7700K generally offers slightly better performance due to its slightly increased clock frequencies and architectural optimizations. As most games benefit from strong single-core performance, the moderate improvements of the Intel Core i7-7700K in this area are advantageous.

However, the difference is not dramatic, so both processors offer good gaming performance for their generation. The Intel Core i7-6700K has a Thermal Design Power (TDP) of 91 Watts. The Intel Core i7-7700K also has a TDP of 91 Watts. Although the Kaby Lake architecture is known for improved efficiency, the TDP remains identical in this comparison, meaning both CPUs require similar cooling solutions to remain stable under full load.

The maximum memory bandwidth for the Intel Core i7-6700K is 34 GB/s, and for the Intel Core i7-7700K, it is 38 GB/s. The Intel Core i7-6700K features integrated Intel HD Graphics 530, while the Intel Core i7-7700K is equipped with Intel HD Graphics 630. On the used market, both processors are available today at relatively low prices.

The Intel Core i7-7700K achieves slightly higher performance per watt and per clock cycle, potentially making it more attractive on the used market if the price difference is small. Given the age of both CPUs, new purchases are no longer relevant, and the decision largely depends on available offers and price.

The Intel Core i7-6700K is a solid but older quad-core processor that still offers good performance for everyday tasks and older games. It is a cost-effective option if an upgrade for an older system with the appropriate socket (LGA1151) is being considered and the budget is limited. The Intel Core i7-7700K offers slightly improved performance and efficiency.

It is the better choice for users who want to get the most out of the LGA1151 platform without upgrading to a newer generation. For new builds, both CPUs are less suitable due to their age and the availability of more modern alternatives.