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 cen ...

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 tech ...

and Kaby Lake-X processors in June 2017. It replaces Intel's

LGA 2011 LGA 2011, also called ''Socket R'', is a CPU socket by Intel released on November 14, 2011. It launched along with LGA 1356 to replace its predecessor, LGA 1366 (Socket B) and LGA 1567. While LGA 1356 was designed for dual-processor or ...

-3 (R3) in the performance, high-end desktop and Workstation platforms (based on the

X299 Intel X299, codenamed "Basin Falls", is a Platform Controller Hub (PCH) designed and manufactured by Intel, targeted at the high-end desktop (HEDT) or enthusiast segment of the Intel product lineup. The X299 chipset supports the Intel Core X-series ...

"Basin Falls" and C422 chipsets), while

LGA 3647 LGA 3647 is an Intel microprocessor compatible socket used by Xeon Phi x200 ("Knights Landing"), Xeon Phi 72x5 ("Knights Mill"), Skylake-SP, Cascade Lake-SP/AP, and Cascade Lake-W microprocessors. The socket supports a 6-channel memory cont ...

(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-X processors were discontinued in May 2018. Starting October 2019,

BIOS In computing, BIOS (, ; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the ...

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''.

Workstation

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

Skylake-W

Cascade Lake-W

References

{{Intelsock Intel CPU sockets