Intel Core i9 9920X 3.5GHz Twelve Core 19.25MB 165W

Background on Intel Core X-series CPU

Intel's enthusiast-class "Core X" processors represent the top-end of their consumer CPU line, and bridge the gap between the more mainstream chips and the Xeon server-grade models. The current 9000-series processors in this line range from eight to eighteen cores, with base clock speeds of 3.0 to 3.8GHz - and turbo boost speeds of up to 4.4GHz. The combination of high core counts with high clock frequencies allow these processors to excel at both single and multi-threaded workloads, while supporting more RAM and PCI-E lanes than the less expensive Core series.

William George (Puget Labs Technician) Says:
These processors were codenamed Skylake-X, when first announced, but Intel seems to have standardized on calling them Core X processors. There were also some Kaby Lake-X chips that share the same socket and were compatible with some of the same motherboards, but they had fewer memory channels and PCI-E lanes, so to avoid confusion and situations where lots of motherboard features are disabled we chose not to offer them.