LGA 2066

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.[1] 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").

LGA 2066
TypeLGA
Chip form factorsFlip-chip land grid array (FCLGA)
Contacts2066
FSB protocol
Processors
  • Kaby Lake-X
  • Skylake-X
  • Skylake-W
  • Cascade Lake-X
  • Cascade Lake-W
PredecessorLGA 2011
SuccessorLGA 4189
Memory supportDDR4

This article is part of the CPU socket series

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]

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Turbo
Boost

3.0

Memory
support
L2

cache

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Core i5-7640X 04 (4)4.0 GHz4.2 GHz 4.0 GHz2 × 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

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Turbo
Boost

3.0

Memory
support
L2

cache

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Core i7-7800X 06 (12)3.5 GHz4.0 GHz N/A4 × DDR4-2400

up to 128 GB

1 MB

per core

08.2528140 W Q2'170$389
Core i7-7820X 08 (16)3.6 GHz4.3 GHz 4.0 GHz4.5 GHz4 × DDR4-2666

up to 128 GB

110$599
Core i9-7900X 10 (20)3.3 GHz13.75440$999
Core i9-7920X 12 (24)2.9 GHz 3.8 GHz4.4 GHz16.5Q3'17$1199
Core i9-7940X 14 (28)3.1 GHz19.25165 W$1399
Core i9-7960X 16 (32)2.8 GHz4.2 GHz 3.6 GHz22$1699
Core i9-7980XE 18 (36)2.6 GHz 3.4 GHz24.75$1999

Skylake-X 9000-series

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Turbo
Boost

3.0

Memory
support
L2

cache

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Core i7-9800X 8 (16) 3.8 GHz 4.4 GHz 4.5 GHz 4 × DDR4-2666

up to 128 GB

1 MB

per core

16.5 44 165 W Q4'18 $589
Core i9-9820X 10 (20) 3.3 GHz 4.1 GHz 4.2 GHz $889
Core i9-9900X 3.5 GHz 4.4 GHz 4.5 GHz 19.25 $989
Core i9-9920X 12 (24) $1189
Core i9-9940X 14 (28) 3.3 GHz $1387
Core i9-9960X 16 (32) 3.1 GHz 22 $1684
Core i9-9980XE 18 (36) 3.0 GHz 3.8 GHz 24.75 $1999

Cascade Lake-X

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Turbo
Boost

3.0

Memory
support
L2

cache

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Core i9-10900X 10 (20) 3.7 GHz 4.5 GHz 4.3 GHz 4.7 GHz 4 × DDR4-2933

up to 256 GB

1 MB

per core

19.25 48 165W Q4'19 $599
Core i9-10920X 12 (24) 3.5 GHz 4.6 GHz 4.8 GHz $700
Core i9-10940X 14 (28) 3.3 GHz 4.1 GHz $797
Core i9-10980XE 18 (36) 3.0 GHz 3.8 GHz 24.75 $1000

Workstation

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

Skylake-W

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Memory
support
L2

cache[3]

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Xeon W‑2102 04 (4) 2.9 GHz N/A 4 x DDR4‑2400

up to 512 GB

1 MB

per core

08.25 48 120 W Q3'17 $202
Xeon W‑2104 3.2 GHz $255
Xeon W‑2123 04 (8)3.6 GHz3.9 GHz 3.7 GHz4 × DDR4‑2666

up to 512 GB

$294
Xeon W‑21254.0 GHz4.5 GHz 4.4 GHz$444
Xeon W‑2133 06 (12)3.6 GHz3.9 GHz 3.8 GHz140 W$617
Xeon W‑21353.7 GHz4.5 GHz 4.4 GHz$835
Xeon W‑2145 08 (16)3.7 GHz 4.3 GHz11$1113
Xeon W‑2155 10 (20)3.3 GHz 4.0 GHz13.75$1440
Xeon W‑2175 14 (28)2.5 GHz 4.3 GHz 3.3 GHz19.25 Q4'17$1950
Xeon W‑2195 18 (36)2.3 GHz 3.2 GHz24.75 Q3'17$2553

Cascade Lake-W

Name Cores

(threads)

Base

Clock

Turbo Boost 2.0 Turbo

Boost 3.0

Memory
support
L2

cache[3]

L3
cache
(MB)
PCIe

3.0
lanes

TDP Release
date
Price
(USD)
Single core All cores
Xeon W-2223 4 (8) 3.6 GHz 3.9 GHz 3.7 GHz N/A 4 × DDR4‑2666

up to 1 TB

1 MB

per core

8.25 48 120 W Q4'19 $297
Xeon W-2225 4.1 GHz 4.6 GHz 4.5 GHz 4 x DDR4-2933

up to 1 TB

105 W $444
Xeon W-2235 6 (12) 3.8 GHz 4.3 GHz 130 W $555
Xeon W-2245 8 (16) 3.9 GHz 4.5 GHz 4.5 GHz 4.7 GHz 16.5 155 W $667
Xeon W-2255 10 (20) 3.7 GHz 4.3 GHz 19.25 165 W $778
Xeon W-2265 12 (24) 3.5 GHz 4.6 GHz 4.8 GHz $944
Xeon W-2275 14 (28) 3.3 GHz 4.1 GHz $1112
Xeon W-2295 18 (36) 3.0 GHz 3.8 GHz 24.75 $1333

References

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