Coffee Lake

Coffee Lake's development was led by Intel Israel's processor design team in Haifa, Israel, as an optimization of Kaby Lake. Intel first launched its 8th Generation Intel Core family processors in August 2017. While with the release of the new 8th Gen Intel Core i9 processor in 2018, Intel said it would be the highest-performance laptop processor Intel has ever built. == Features ==

Coffee Lake CPUs are built using the second refinement of Intel's 14 nm process (14 nm++). It features increased transistor gate pitch for a lower current density and higher leakage transistors that allows higher peak power and higher frequency at the expense of die area and idle power. Coffee Lake marks a shift in the number of cores for Intel's mainstream desktop processors, the first such update for the previous ten-year history of Intel Core CPUs. In the 8th generation, mainstream desktop i7 CPUs feature six hyperthreaded cores, i5 CPUs feature six single-threaded cores and i3 CPUs feature four single-threaded cores. 9th generation For the 9th generation, the Intel Core i9 branding made its debut on the mainstream desktop, describing CPUs with 8 cores and 16 threads. 9th generation i7s feature 8 single-threaded cores, marking the first time desktop Core i7s have not featured Intel's Hyper-threading technology, although the 9th generation Core i7 mobile CPUs do support hyperthreading and have 6 cores just like 8th gen mobile chips. 9th generation i5 CPUs feature six single-threaded cores, just like their 8th generation predecessors. The ninth generation Core i series includes hardware fixes for Meltdown and L1 Terminal Fault. == Chipsets ==

The 300 series chipsets, while using physically identical LGA 1151 socket to the 100 and 200 series chipsets, are officially only compatible with Coffee Lake CPUs, meaning that older motherboards do not officially support Coffee Lake processors, == Architecture changes compared with Kaby Lake ==

Coffee Lake features largely the same CPU core and performance per MHz as Skylake/Kaby Lake. Features specific to Coffee Lake include: CPU • Increased core count: Core i3 increased from 2 to 4 cores, Core i5 and 8th Generation i7 parts increased from 4 to 6 cores, 9th generation i7 and i9 parts feature eight cores. • Increased L3 cache in accordance to the number of threads • Increased turbo clock speeds across i5 and i7 CPUs models (increased by up to 400 MHz) • The 9th generation loses Hyper-threading except on i9. • DDR4 memory support updated for 2666 MT/s (for i5, i7 and i9 parts) and 2400 MT/s (for i3 parts) • DDR3 memory is no longer supported on LGA1151 parts, unless using with H310C chipset • Hardware mitigations against spectre variant 3 and 5 on 9th generation GPU • Increased iGPU clock speeds by 50 MHz and rebranded it UHD (Ultra High Definition) I/O • 300 series chipset on the second revision of socket LGA 1151 • Support for CNVi == Kaby Lake Refresh vs. Coffee Lake ==

On August 8, 2017, Intel announced the first of its new eighth generation of processors would be mobile processors. As Intel's previous changes in product generations coincided with new microarchitectures, it was unclear but generally expected that the eighth Core generation products would be based on the new Coffee Lake microarchitecture. When it was officially announced on August 21, 2017, however, Intel stated that the eighth generation family would be based on multiple microarchitectures: Kaby Lake Refresh, Coffee Lake, Whiskey Lake, and Cannon Lake. == List of 8th generation Coffee Lake processors ==

Coffee Lake-S (Desktop processors) These processors mark the first time that Intel has released mainstream consumer CPUs that support up to 128 GB RAM. • various reviews show that the Core i7-8700K CPU may consume over 110 W under load. Coffee Lake-S WS (server/workstation processors) LGA 1151 Mobile processors (Coffee Lake H and Coffee Lake U) == List of 9th generation Coffee Lake processors (Coffee Lake Refresh) ==

The first 9th generation Coffee Lake CPUs were released in the fourth quarter of 2018. They include hardware mitigations against certain Meltdown/Spectre vulnerabilities. The main differences from the 8th generation (besides increased frequency) are: • Core i7 parts contain 8/8 cores/threads compared to 6/12 in 8th generation Core i7 parts. • Core i3 parts are equipped with Turbo Boost technology. Even though the CPUs with F suffix lack an integrated GPU, Intel set the same price for these CPUs as their featureful counterparts. Intel eventually reduced the official pricing of those CPUs in October 2019. The Intel Core i9-9900KS CPU, released at the end of October 2019, features a limited one year warranty both for box and tray versions due to "its limited volume". Coffee Lake-S (desktop processors) Server/workstation processors Coffee Lake-E CPUs require C242 or C246 chipset. Mobile processors (Xeon E and Coffee Lake-H Refresh) == See also ==