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").
LGA 2066 and LGA 1151 are the last two Intel sockets to officially support Windows 7, Windows Server 2008 R2, Windows 8, Windows Server 2012, Windows 8.1 and Windows Server 2012 R2 and the earliest two Intel sockets to officially support all versions of Windows 11.
01Compatible 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.
| Name | Cores
(threads) |
Base
Clock |
Turbo Boost 2.0 | Turbo Boost 3.0 |
Memory support |
L2
cache |
L3 cache (MB) |
PCIe
3.0 |
TDP | Release date |
Price (USD) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | |||||||||||
| Core i5-7640X | 04 (4) | 4.0 GHz | 4.2 GHz | 4.0 GHz | , N/a | 2 × DDR4-2666
up to 64 GB |
0256 KB
per core |
06 | 16 | 112 W | Q2'17 | 0$242 |
| Core i7-7740X | 04 (8) | 4.3 GHz | 4.5 GHz | 08 | 0$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 |
TDP | Release date |
Price (USD) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | |||||||||||
| Core i7-7800X | 06 (12) | 3.5 GHz | 4.0 GHz | N/A | 4 × DDR4-2400
up to 128 GB |
1 MB
per core |
08.25 | 28 | 140 W | Q2'17 | 0$389 | |
| Core i7-7820X | 08 (16) | 3.6 GHz | 4.3 GHz | 4.0 GHz | 4.5 GHz | 4 × DDR4-2666
up to 128 GB |
11 | 0$599 | ||||
| Core i9-7900X | 10 (20) | 3.3 GHz | 13.75 | 44 | 0$999 | |||||||
| Core i9-7920X | 12 (24) | 2.9 GHz | 3.8 GHz | 4.4 GHz | 16.5 | Q3'17 | $1199 | |||||
| Core i9-7940X | 14 (28) | 3.1 GHz | 19.25 | 165 W | $1399 | |||||||
| Core i9-7960X | 16 (32) | 2.8 GHz | 4.2 GHz | 3.6 GHz | 22 | $1699 | ||||||
| Core i9-7980XE | 18 (36) | 2.6 GHz | 3.4 GHz | 24.75 | $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 |
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 |
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. 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
| Name | Cores
(threads) |
Base
Clock |
Turbo Boost 2.0 | Memory support |
L2
cache |
L3 cache (MB) |
PCIe
3.0 |
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 GHz | 3.9 GHz | 3.7 GHz | 4 × DDR4‑2666
up to 512 GB |
$294 | |||||
| Xeon W‑2125 | 4.0 GHz | 4.5 GHz | 4.4 GHz | $444 | |||||||
| Xeon W‑2133 | 06 (12) | 3.6 GHz | 3.9 GHz | 3.8 GHz | 140 W | $617 | |||||
| Xeon W‑2135 | 3.7 GHz | 4.5 GHz | 4.4 GHz | $835 | |||||||
| Xeon W‑2140B* | 08 (16) | 3.2 GHz | 4.2 GHz | 3.8 GHz | 11 | 120 W | N/A | ||||
| Xeon W‑2145 | 3.7 GHz | 4.5 GHz | 4.3 GHz | 140 W | $1113 | ||||||
| Xeon W‑2155 | 10 (20) | 3.3 GHz | 4.0 GHz | 13.75 | Q4'17 | $1440 | |||||
| Xeon W‑2175 | 14 (28) | 2.5 GHz | 4.3 GHz | 3.3 GHz | 19.25 | $1950 | |||||
| Xeon W‑2195 | 18 (36) | 2.3 GHz | 3.2 GHz | 24.75 | Q3'17 | $2553 | |||||
(* = OEM CPU found in Apple Mac Pro with lower TDP)
Cascade Lake-W
| Name | Cores
(threads) |
Base
Clock |
Turbo Boost 2.0 | Turbo
Boost 3.0 |
Memory support |
L2
cache |
L3 cache (MB) |
PCIe
3.0 |
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 | |||||||
Sources and credits
This article is adapted from the Wikipedia article “LGA 2066”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Socket 2066 IMGP5870 smial wp.jpg by Smial (talk), FAL
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