LGA 2066, also called ''Socket R4'', is a

CPU socket In computer hardware, a CPU socket or CPU slot contains one or more mechanical components providing mechanical and electrical connections between a microprocessor and a printed circuit board (PCB). This allows for placing and replacing the centr ...

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

that debuted with

Skylake-X Skylake is the codename used by Intel for a processor microarchitecture that was launched in August 2015 succeeding the Broadwell microarchitecture. Skylake is a microarchitecture redesign using the same 14 nm manufacturing process techn ...

and

Kaby Lake-X Kaby Lake is Intel's codename for its seventh generation Core microprocessor family announced on August 30, 2016. Like the preceding Skylake, Kaby Lake is produced using a 14 nanometer manufacturing process technology. Breaking with Intel's pr ...

processors in June 2017. It replaces Intel's LGA 2011-3 (R3) in the performance, high-end desktop and Workstation platforms (based on the Intel X299, X299 "Basin Falls" and C422 chipsets), while LGA 3647 (Socket P) replaces LGA 2011-3 (R3) in the server platforms based on Skylake-SP (Xeon "Purley").

Compatible processors

High-End Desktop (HEDT)

All of these CPUs require the Intel X299 chipset to work. So, the C422 chipset is strictly limited to work with workstation processors only.

Kaby Lake-X Kaby Lake is Intel's codename for its seventh generation Core microprocessor family announced on August 30, 2016. Like the preceding Skylake, Kaby Lake is produced using a 14 nanometer manufacturing process technology. Breaking with Intel's pr ...

Kaby Lake-X processors were discontinued in May 2018. Starting October 2019, BIOS updates for most of the X299-based motherboards removed support for Kaby Lake-X processors."X299 BIOS Update for Intel Cascade Lake-X Will Kill Kaby Lake-X Support"
''Tom's Hardware''.

Skylake (microarchitecture)#High-end desktop processors (Skylake-X), Skylake-X 7000-series

Skylake (microarchitecture)#High-end desktop processors (Skylake-X), Skylake-X 9000-series

Cascade Lake (microarchitecture), Cascade Lake-X

Workstation

Take note that certain types of Xeon processors will not work on this socket, like Skylake-P.

Skylake (microarchitecture)#Workstation processors, Skylake-W

Cascade Lake (microarchitecture)#Cascade Lake-W (Workstation), Cascade Lake-W

References

{{Intelsock Intel CPU sockets