CPU Comparison

Core i7-7800X vs Intel Core i7-8700K

A side-by-side comparison of specs, performance and value. The Intel Core i7-7800X is a high-end desktop (HEDT) processor launched in June 2017 as part of the Skylake-X family. Designed for the LGA 2066 socket, this 14nm CPU features 6 cores and 12 threads, providing a substantial multi-threaded upgrade over mainstream quad-core parts of the era. Operating at a base clock of 3.5 GHz and boosting up to 4.0 GHz, it balances frequency with core density for workstation workloads. With a 140W TDP, it requires robust cooling and a capable motherboard. The processor features a unique cache hierarchy with 8.25MB of L3 cache and 1MB of dedicated L2 cache per core. It supports quad-channel DDR4-2400 memory, offering massive memory bandwidth, and includes 28 PCIe 3.0 lanes for extensive expansion capabilities. Lacking integrated graphics, it targets creators and enthusiasts who rely on discrete GPUs. The i7-7800X brought true HEDT features to a more accessible price point, though it faced fierce competition from AMD's Ryzen Threadripper.