Intel BX80684I58400 Core i5-8400 6-Core Desktop Processor

The Intel Core i5-8400 was a significant step forward in Intel's mainstream desktop lineup, doubling the core count from four to six compared to its 7th Gen predecessor. Built on the Coffee Lake architecture and fabricated on a 14nm process, it delivers a base frequency of 2.80 GHz with Turbo Boost capability up to 4.00 GHz, backed by 9 MB of SmartCache. The 65W TDP makes it one of the more power-efficient six-core options, keeping thermal demands manageable even with the included stock cooler in most scenarios.

For everyday desktop use — web browsing, office productivity, media consumption, and moderate gaming — the i5-8400 provides responsive and capable performance. The integrated Intel UHD Graphics 630 is sufficient for display output and basic tasks without a dedicated GPU, and support for Intel Optane Memory allows users to accelerate traditional hard drive storage. The main limitations are its locked multiplier, which rules out overclocking, and the absence of hyper-threading, which means heavily multi-threaded workloads like video rendering or complex compilation will not benefit from virtual threads. Compatibility is restricted to Intel 300 Series chipset motherboards using the LGA 1151 socket, so builders should verify board compatibility before purchasing.