Coffee Lake is Intel's codename for the second 14 nm process refinement following Broadwell, Skylake, and Kaby Lake. The integrated graphics on Coffee Lake chips allow support for DP 1.2 to HDMI 2.0 and HDCP 2.2 connectivity. Coffee Lake natively supports DDR4-2666 MHz memory in dual channel mode when used with Xeon, Core i5 and i7 CPUs, DDR4-2400 MHz memory in dual channel mode when used with Celeron, Pentium, and Core i3 CPUs, and LPDDR3-2133 MHz memory when used with mobile CPUs.
Desktop Coffee Lake CPUs introduce a major change in Intel's Core CPUs nomenclature, in that i5 and i7 CPUs feature six cores (along with hyper-threading in the case of the latter). Core i3 CPUs, having four cores and dropping hyper-threading for the first time, received a change as well.
The chips were released on October 5, 2017. Coffee Lake will be used in conjunction with the 300-series chipset, and officially will not work with the 100- and 200-series chipset motherboards. Although desktop Coffee Lake processors use the same physical LGA 1151 socket as Skylake and Kaby Lake, the pinout is electrically incompatible with these older processors and motherboards. However, in recent times, motherboard BIOSes have been modified by enthusiasts to unofficially support Skylake and Kaby Lake CPUs in 300-series motherboards, and vice versa, shedding light on the initial controversy that Intel intentionally blocked motherboard manufacturers from providing backwards compatibility between Skylake and Kaby Lake processors and 300-series motherboards, and vice versa.
On April 2, 2018 Intel released additional desktop Core i3, i5, i7, Pentium Gold, Celeron CPUs and for the first time in its history six core Core i7 and i9 mobile CPUs as well as hyper-threaded four core Core i5 mobile CPUs, and the first Coffee Lake ultra-power CPUs with Intel Iris Plus graphics.
Video Coffee Lake
Features
Coffee Lake CPUs are built using the second refinement of Intel's 14 nm process (14++). It features increased transistor gate pitch for a lower current density and higher leakage transistors which 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. Mainstream desktop i7 CPUs feature six cores and 12 threads, i5 CPUs feature six single-threaded cores and i3 CPUs feature four single-threaded cores.
Maps Coffee Lake
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, and 300 series motherboards do not officially support Skylake or Kaby Lake processors.
Architecture changes compared to Kaby Lake
Coffee Lake features largely the same CPU core and performance per MHz as Skylake/Kaby Lake. Features specific to Coffee Lake include:
- Increased core count to six cores on Core i5 and i7 parts; Core i3 is now a quad-core brand
- 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)
- Increased iGPU clock speeds by 50 MHz and rebranded it UHD (Ultra High Definition)
- DDR4 memory support updated for 2666 MHz (for i5 and i7 parts) and 2400 MHz (for i3 parts); DDR3 memory is no longer supported on LGA1151 parts
- 300 series chipset on the second revision of socket LGA 1151
Kaby Lake Refresh vs. Coffee Lake
On August 8, 2017, Intel announced that new eighth generation of processors would be revealed the following August 21. 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. However, when it was officially announced on August 21, 2017, Intel stated that the eighth generation would be based on multiple microarchitectures, including Kaby Lake, Coffee Lake, and Cannonlake.
Additional core resources in mid-range eighth-generation Coffee Lake desktop chips offer significant gains in performance versus previous seventh-generation Intel CPUs in multi-threaded workloads. However, the architecture delivers no IPC difference over Skylake or Kaby Lake.
List of Coffee Lake processors
Desktop processors
Mainstream Desktop, Workstation and basic Server Coffee Lake CPUs are intended to run with LGA 1151 socket motherboards, but they are officially only compatible with 300-series chipsets.
Workstation processors
Mobile processors
See also
- List of Intel CPU microarchitectures
References
External links
- "Products formerly Coffee Lake". Intel. Archived from the original on 2017-10-05. Retrieved 2017-10-19.
Source of article : Wikipedia
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