Intel Xeon W-2170B socket: LGA 2066
The Intel Xeon W-2170B uses the LGA 2066 socket in Apple Mac Pro workstations. It is a 14 core Skylake-W OEM chip at 140 W with boost to 4.3 GHz.
- Socket
- LGA 2066
- Launched
- 2017
- Cores and threads
- 14 and 28
- Base power
- 140 W
- Codename
- Skylake-W
- Segment
- Workstation
- Family
- Intel Xeon W
- Clocks
- 2.5 / 4.3 GHz
Intel Xeon W-2170B specifications
| Cores | 14 |
|---|---|
| Threads | 28 |
| Core architecture | Skylake-W on 14 nm |
| Clocks | 2.5 GHz base, up to 4.3 GHz Turbo |
| Cache | 19 MB L3 |
| Processor base power (TDP) | 140 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4-2666, four channels, up to 512 GB with ECC |
| PCI Express | PCIe 3.0, 48 lanes from the CPU |
| Integrated graphics | None |
| Multiplier | Locked |
| ECC memory | Yes |
| Package | FCLGA2066 (45.0 × 52.5 mm) |
Motherboard compatibility
Intel Xeon W-2170B needs a motherboard with a LGA 2066 socket. Chipset by chipset data for this codename is not recorded yet. See the LGA 2066 chipset list and the board maker's CPU support list.
LGA 2066 at a glance
| Type | LGA, 2,066 contacts |
|---|---|
| Package size | n/a |
| Introduced | June 2017 |
| Memory | DDR4-2933, four channels, up to 256 GB |
| Cooler mounting holes | 80 × 80 mm |
What the Xeon W-2170B is
The Xeon W-2170B is a fourteen core, twenty eight thread OEM workstation processor from Skylake-W. It launched in December 2017 for Apple Mac Pro systems with a 2.5 GHz base and up to 4.3 GHz Turbo at 140 W. Fourteen cores cover video workstations where threads shorten exports.
Nineteen point two five megabytes of L3 cache feed fourteen cores. The 2.5 GHz base keeps power in check across many cores, while 4.3 GHz boost keeps interactive editing brisk. One hundred forty watts suit Mac Pro tower cooling.
No integrated graphics ship. Quad channel DDR4-2666 ECC suits large timelines with error cover. Forty eight PCIe lanes allow Afterburner plus GPUs and NVMe storage in Mac Pro slots.
The B suffix marks Apple OEM variants without Trusted Execution Technology against standard W-2175. Locked multiplier keeps workstation behavior stable. Buyers meet it only in used Mac Pro systems, since tray channels never sold it separately.
Socket and motherboard compatibility
The W-2170B fits LGA 2066 in Apple Mac Pro 2019 boards, not retail C422 boards. Apple firmware enables its power and thermal tables. Standard C422 board lists do not include B variants.
Mac Pro memory slots wire four channels with ECC for workstation loads. PCIe expansion follows Apple slot guidance for GPUs and I/O cards. The Socket vs chipset: what decides whether a CPU works guide explains why OEM variants stay with OEM boards.
The Xeon W-2175 is the retail counterpart with TXT support on C422 boards. The W-2191B adds four cores in Mac Pro configurations.
Memory, PCIe and cooling
DDR4-2666 ECC in four channels is the Mac Pro memory design. Apple DIMMs hold quad channel mode for bandwidth. ECC protects long renders.
Forty eight PCIe lanes feed Mac Pro slots for GPUs and I/O. Expansion follows Apple thermal budgets per slot. NVMe storage uses dedicated lanes.
One hundred forty watts cool with Mac Pro blower and heat sink assembly. Service follows Apple manuals, not retail cooler guides.
Upgrade paths
On Mac Pro the move is W-2191B for more cores where Apple supports it. Memory and GPU upgrades help most workflows first.
Past LGA 2066 a new Mac Pro platform is required. Retail C422 towers use W-2175 instead for standard firmware.
Frequently asked questions
What socket does the Xeon W-2170B use?
It uses LGA 2066 in Apple Mac Pro systems.
How many cores does the W-2170B have?
Fourteen cores with twenty eight threads at 2.5 GHz base with up to 4.3 GHz Turbo.
What is the difference between W-2170B and W-2175?
The B variant lacks Trusted Execution Technology and ships only in Mac Pro, while W-2175 is retail with TXT.
When did the W-2170B launch?
December 2017 with Apple Mac Pro workstation options.
Sources and verification
Facts last checked against these sources on . Page last edited on .