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LGA 2066
Intel CPU socket

LGA 2066, also called Socket R4, is a CPU socket by Intel that debuted with Skylake-X and Kaby Lake-X processors in June 2017. It replaces Intel's LGA 2011-3 (R3) in the performance, high-end desktop and Workstation platforms (based on the 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").

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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 updates for most of the X299-based motherboards removed support for Kaby Lake-X processors.2

NameCores

(threads)

Base

Clock

Turbo Boost 2.0TurboBoost

3.0

MemorysupportL2

cache

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Core i5-7640X04 (4)4.0 GHz4.2 GHz4.0 GHz—2 × DDR4-2666

up to 64 GB

0256 KB

per core

0616112 WQ2'170$242
Core i7-7740X04 (8)4.3 GHz4.5 GHz080$339

Skylake-X 7000-series

NameCores

(threads)

Base

Clock

Turbo Boost 2.0TurboBoost

3.0

MemorysupportL2

cache

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Core i7-7800X06 (12)3.5 GHz4.0 GHzN/A4 × DDR4-2400

up to 128 GB

1 MB

per core

08.2528140 WQ2'170$389
Core i7-7820X08 (16)3.6 GHz4.3 GHz4.0 GHz4.5 GHz4 × DDR4-2666

up to 128 GB

110$599
Core i9-7900X10 (20)3.3 GHz13.75440$999
Core i9-7920X12 (24)2.9 GHz3.8 GHz4.4 GHz16.5Q3'17$1199
Core i9-7940X14 (28)3.1 GHz19.25165 W$1399
Core i9-7960X16 (32)2.8 GHz4.2 GHz3.6 GHz22$1699
Core i9-7980XE18 (36)2.6 GHz3.4 GHz24.75$1999

Skylake-X 9000-series

NameCores

(threads)

Base

Clock

Turbo Boost 2.0TurboBoost

3.0

MemorysupportL2

cache

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Core i7-9800X8 (16)3.8 GHz4.4 GHz4.5 GHz4 × DDR4-2666

up to 128 GB

1 MB

per core

16.544165 WQ4'18$589
Core i9-9820X10 (20)3.3 GHz4.1 GHz4.2 GHz$889
Core i9-9900X3.5 GHz4.4 GHz4.5 GHz19.25$989
Core i9-9920X12 (24)$1189
Core i9-9940X14 (28)3.3 GHz$1387
Core i9-9960X16 (32)3.1 GHz22$1684
Core i9-9980XE18 (36)3.0 GHz3.8 GHz24.75$1999

Cascade Lake-X

NameCores

(threads)

Base

Clock

Turbo Boost 2.0TurboBoost

3.0

MemorysupportL2

cache

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Core i9-10900X10 (20)3.7 GHz4.5 GHz4.3 GHz4.7 GHz4 × DDR4-2933

up to 256 GB

1 MB

per core

19.2548165WQ4'19$599
Core i9-10920X12 (24)3.5 GHz4.6 GHz4.8 GHz$700
Core i9-10940X14 (28)3.3 GHz4.1 GHz$797
Core i9-10980XE18 (36)3.0 GHz3.8 GHz24.75$1000

Workstation

Take note that certain types of Xeon processors will not work on this socket, like Skylake-P. There are four OEM variants that can be found in Apple Mac Pro: W-2140B and W-2150B (lower freq/TDP than their W-21x5 counterparts), W-2170B and W-2191B lack Trusted_Execution_Technology (TXT) in comparison.

Skylake-W

NameCores

(threads)

Base

Clock

Turbo Boost 2.0MemorysupportL2

cache3

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Xeon W‑210204 (4)2.9 GHzN/A4 x DDR4‑2400

up to 512 GB

1 MB

per core

08.2548120 WQ3'17$202
Xeon W‑21043.2 GHz$255
Xeon W‑212304 (8)3.6 GHz3.9 GHz3.7 GHz4 × DDR4‑2666

up to 512 GB

$294
Xeon W‑21254.0 GHz4.5 GHz4.4 GHz$444
Xeon W‑213306 (12)3.6 GHz3.9 GHz3.8 GHz140 W$617
Xeon W‑21353.7 GHz4.5 GHz4.4 GHz$835
Xeon W‑2140B*08 (16)3.2 GHz4.2 GHz3.8 GHz11120 WN/A
Xeon W‑21453.7 GHz4.5 GHz4.3 GHz140 W$1113
Xeon W‑215510 (20)3.3 GHz4.0 GHz13.75Q4'17$1440
Xeon W‑217514 (28)2.5 GHz4.3 GHz3.3 GHz19.25$1950
Xeon W‑219518 (36)2.3 GHz3.2 GHz24.75Q3'17$2553

(* = OEM CPU found in Apple Mac Pro with lower TDP)

Cascade Lake-W

NameCores

(threads)

Base

Clock

Turbo Boost 2.0Turbo

Boost 3.0

MemorysupportL2

cache4

L3cache(MB)PCIe

3.0lanes

TDPReleasedatePrice(USD)
Single coreAll cores
Xeon W-22234 (8)3.6 GHz3.9 GHz3.7 GHzN/A4 × DDR4‑2666

up to 1 TB

1 MB

per core

8.2548120 WQ4'19$297
Xeon W-22254.1 GHz4.6 GHz4.5 GHz4 x DDR4-2933

up to 1 TB

105 W$444
Xeon W-22356 (12)3.8 GHz4.3 GHz130 W$555
Xeon W-22458 (16)3.9 GHz4.5 GHz4.5 GHz4.7 GHz16.5155 W$667
Xeon W-225510 (20)3.7 GHz4.3 GHz19.25165 W$778
Xeon W-226512 (24)3.5 GHz4.6 GHz4.8 GHz$944
Xeon W-227514 (28)3.3 GHz4.1 GHz$1112
Xeon W-229518 (36)3.0 GHz3.8 GHz24.75$1333

References

  1. "First Intel Core X-Series Processors Pre-Orders Begin Today, Available Starting June 26". Intel Newsroom. Retrieved 2020-05-18. https://newsroom.intel.com/news/first-intel-core-x-series-processors-pre-orders-begin-today-available-starting-june-26/ ↩

  2. "X299 BIOS Update for Intel Cascade Lake-X Will Kill Kaby Lake-X Support".Tom's Hardware. https://www.tomshardware.com/news/x299-bios-updates-wont-support-intel-kaby-lake-x-cpus ↩

  3. "Skylake-X's New L3 Cache Architecture". AnandTech. http://www.anandtech.com/show/11464/intel-announces-skylakex-bringing-18core-hcc-silicon-to-consumers-for-1999/3 ↩

  4. "Skylake-X's New L3 Cache Architecture". AnandTech. http://www.anandtech.com/show/11464/intel-announces-skylakex-bringing-18core-hcc-silicon-to-consumers-for-1999/3 ↩