Intel Xeon W-2140B socket: LGA 2066
The Intel Xeon W-2140B uses the LGA 2066 socket in Apple Mac Pro workstations. It is an 8 core Skylake-W OEM chip at 105 W with boost to 4.5 GHz.
- Socket
- LGA 2066
- Launched
- 2017
- Cores and threads
- 8 and 16
- Base power
- 105 W
- Codename
- Skylake-W
- Segment
- Workstation
- Family
- Intel Xeon W
- Clocks
- 3.2 / 4.5 GHz
Intel Xeon W-2140B specifications
| Cores | 8 |
|---|---|
| Threads | 16 |
| Core architecture | Skylake-W on 14 nm |
| Clocks | 3.2 GHz base, up to 4.5 GHz Turbo |
| Cache | 11 MB L3 |
| Processor base power (TDP) | 105 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-2140B 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-2140B is
The Xeon W-2140B is an eight core, sixteen thread OEM workstation processor from Skylake-W. It launched in 2017 for Apple Mac Pro systems with a 3.2 GHz base and up to 4.5 GHz Turbo at 105 W. Eight cores cover Mac Pro towers where balanced threads and clocks matter.
Eleven megabytes of L3 cache feed eight cores. The 3.2 GHz base sustains creation work, while 4.5 GHz single core boost lifts interactive tasks. All core Turbo reaches 3.8 GHz for sustained renders.
No integrated graphics ship. Quad channel DDR4-2666 ECC up to 512 GB suits Mac Pro timelines. Forty eight PCIe lanes feed GPUs and I/O in Mac Pro slots.
The B suffix marks Apple OEM variants with lower TDP than retail counterparts. Locked multiplier keeps workstation behavior stable. Buyers meet it only in used Mac Pro.
Socket and motherboard compatibility
The W-2140B fits LGA 2066 in Apple Mac Pro boards. Apple firmware carries its power tables. Retail C422 lists do not include B variants.
Mac Pro memory slots wire four channels with ECC. Expansion follows Apple slot guidance. The Socket vs chipset: what decides whether a CPU works guide explains OEM limits.
The Xeon W-2145 is the retail 8 core counterpart at 140 W on C422 boards. The W-2150B is the 10 core Mac Pro option.
Memory, PCIe and cooling
DDR4-2666 ECC in four channels up to 512 GB is the Mac Pro design. Quad channel mode needs four DIMMs. ECC protects long jobs.
Forty eight PCIe lanes feed Mac Pro expansion. GPUs and I/O split lanes per Apple budgets.
One hundred five watts cool with Mac Pro thermal assembly. Service follows Apple manuals.
Upgrade paths
On Mac Pro memory and GPU upgrades help most workflows first. CPU moves stay within Apple B variants.
Past LGA 2066 a new Mac Pro platform is required. Retail towers use W-2145 instead.
Frequently asked questions
What socket does the Xeon W-2140B use?
It uses LGA 2066 in Apple Mac Pro systems.
How many cores does the W-2140B have?
Eight cores with sixteen threads at 3.2 GHz base with up to 4.5 GHz Turbo.
What is the TDP of the W-2140B?
105 W per CPU-Monkey, below the 140 W retail W-2145.
When did the W-2140B launch?
2017 with Apple Mac Pro workstation options.
Sources and verification
Facts last checked against these sources on . Page last edited on .