LGA 2066
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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").
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.
| 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 | |||||||||||
| 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 | |
| 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 lanes | TDP | Release date | Price (USD) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | ||||||||||
| 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 | |
| 08 (16) | 3.6 GHz | 4.3 GHz | 4.0 GHz | 4.5 GHz | 4 × DDR4-2666 up to 128 GB | 11 | 0$599 | ||||
| 10 (20) | 3.3 GHz | 13.75 | 44 | 0$999 | |||||||
| 12 (24) | 2.9 GHz | 3.8 GHz | 4.4 GHz | 16.5 | Q3'17 | $1199 | |||||
| 14 (28) | 3.1 GHz | 19.25 | 165 W | $1399 | |||||||
| 16 (32) | 2.8 GHz | 4.2 GHz | 3.6 GHz | 22 | $1699 | ||||||
| 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 lanes | TDP | Release date | Price (USD) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | |||||||||||
| 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 | ||
| 10 (20) | 3.3 GHz | 4.1 GHz | 4.2 GHz | $889 | ||||||||
| 3.5 GHz | 4.4 GHz | 4.5 GHz | 19.25 | $989 | ||||||||
| 12 (24) | $1189 | |||||||||||
| 14 (28) | 3.3 GHz | $1387 | ||||||||||
| 16 (32) | 3.1 GHz | 22 | $1684 | |||||||||
| 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 | |||||||||||
| 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 | |
| 12 (24) | 3.5 GHz | 4.6 GHz | 4.8 GHz | $700 | ||||||||
| 14 (28) | 3.3 GHz | 4.1 GHz | $797 | |||||||||
| 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 lanes | TDP | Release date | Price (USD) |
|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | |||||||||
| 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 | |
| 3.2 GHz | $255 | |||||||||
| 04 (8) | 3.6 GHz | 3.9 GHz | 3.7 GHz | 4 × DDR4‑2666 up to 512 GB | $294 | |||||
| 4.0 GHz | 4.5 GHz | 4.4 GHz | $444 | |||||||
| 06 (12) | 3.6 GHz | 3.9 GHz | 3.8 GHz | 140 W | $617 | |||||
| 3.7 GHz | 4.5 GHz | 4.4 GHz | $835 | |||||||
| 08 (16) | 3.2 GHz | 4.2 GHz | 3.8 GHz | 11 | 120 W | N/A | ||||
| 3.7 GHz | 4.5 GHz | 4.3 GHz | 140 W | $1113 | ||||||
| 10 (20) | 3.3 GHz | 4.0 GHz | 13.75 | Q4'17 | $1440 | |||||
| 14 (28) | 2.5 GHz | 4.3 GHz | 3.3 GHz | 19.25 | $1950 | |||||
| 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 lanes | TDP | Release date | Price (USD) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single core | All cores | |||||||||||
| 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 | |
| 4.1 GHz | 4.6 GHz | 4.5 GHz | 4 x DDR4-2933 up to 1 TB | 105 W | $444 | |||||||
| 6 (12) | 3.8 GHz | 4.3 GHz | 130 W | $555 | ||||||||
| 8 (16) | 3.9 GHz | 4.5 GHz | 4.5 GHz | 4.7 GHz | 16.5 | 155 W | $667 | |||||
| 10 (20) | 3.7 GHz | 4.3 GHz | 19.25 | 165 W | $778 | |||||||
| 12 (24) | 3.5 GHz | 4.6 GHz | 4.8 GHz | $944 | ||||||||
| 14 (28) | 3.3 GHz | 4.1 GHz | $1112 | |||||||||
| 18 (36) | 3.0 GHz | 3.8 GHz | 24.75 | $1333 |