Intel Xeon E5-2666 v4 socket: LGA 2011-v3
The Intel Xeon E5-2666 v4 uses the LGA 2011-v3 socket on C612 server boards. It is a 12 core Broadwell-EP part at 2.8 GHz and 145 W with DDR4 and ECC for cloud racks.
- Socket
- LGA 2011-v3
- Launched
- 2016
- Cores and threads
- 12 and 24
- Base power
- 145 W
- Codename
- Broadwell-EP
- Segment
- Server
- Family
- Intel Xeon E5
- Clocks
- 2.8 / 3.4 GHz
Intel Xeon E5-2666 v4 specifications
| Cores | 12 |
|---|---|
| Threads | 24 |
| Core architecture | Broadwell-EP cores on 14 nm |
| Clocks | 2.8 GHz base, up to 3.4 GHz |
| Cache | 30 MB Intel Smart Cache |
| Processor base power (TDP) | 145 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4 with ECC, four channels |
| PCI Express | PCIe 3.0, 40 lanes |
| Integrated graphics | None (server CPU) |
| Multiplier | Locked |
| ECC memory | Supported |
| Package | LGA 2011-v3 (2011 contacts) |
| Scalability | 2S (2 x 9.6 GT/s QPI) |
Motherboard and chipset compatibility
Intel Xeon E5-2666 v4 needs a motherboard with a LGA 2011-v3 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C612 series | C612 | Works out of the box Server boards with C612 ship with Broadwell-EP support. Check the board CPU support list for the BIOS version. |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 2011-v3.
LGA 2011-v3 at a glance
| Type | LGA, 2,011 contacts |
|---|---|
| Package size | 52.5 × 45 mm |
| Introduced | August 2014 |
| Memory | DDR4-2400, four channels, up to 128 GB |
| Cooler mounting holes | 80 × 80 mm |
What the Xeon E5-2666 v4 is
The Xeon E5-2666 v4 brings Broadwell-EP to LGA 2011-v3 for cloud racks with DDR4. It launched in 2016 with a 2.8 GHz base and up to 3.4 GHz boost at 145 W. Intel targets hosts that need 12 cores with high clocks in dual socket nodes.
Thirty megabytes of Smart Cache carry guests and tables. The high base clock suits latency sensitive tenants. Twenty four threads cover VMs plus background agents.
There is no integrated GPU, so serial and network manage the node. The process is 14 nm. The multiplier is locked. DDR4 with ECC in four channels feeds cores on Grantley boards.
Buyers choose the board at order time with memory size and drive tier. The 145 W rating needs 2U airflow with redundant fans. Two QPI links at 9.6 GT/s join paired sockets where nodes run 2S.
Socket and motherboard compatibility
The Xeon E5-2666 v4 fits LGA 2011-v3 on C612 server boards with DDR4 slots. Makers list Broadwell-EP with 2016 BIOS builds. Early stock may need an update.
Dual socket builds are supported with two QPI links. Single socket towers can also carry it where listed. The Socket vs chipset: what decides whether a CPU works guide covers matching.
Rack nodes with one or two sockets are the deployment. Growth means more LGA 2011-v3 nodes. Power needs metered racks for 145 W per socket plus memory.
Memory, PCIe and cooling
DDR4 with ECC in four channels suits cloud hosts with many guests. Quad channel bandwidth helps live migration. Start with 128 GB for dense hosts.
PCIe 3.0 with 40 lanes per CPU serves HBAs and NICs. Boards split lanes between risers and NVMe. Chipset lanes add SATA and USB.
Cooling follows server practice with vendor heatsinks for 145 W classes. No cooler ships in the box. Keep aisles clear where racks run continuously. ECC guards memory.
Upgrade paths
On the same socket, the Intel Xeon E5-2687W v4 gives 12 cores at 3.0 GHz base for frequency tuned nodes at 160 W. The Intel Xeon E5-2690 v4 moves to 14 cores for denser hosts. Both share LGA 2011-v3 boards.
Workstation Intel Xeon E5-1650 v4 gives six fast cores for single socket desks. It needs different boards for 1S use.
Past cloud racks move to Skylake-SP. The E5-2666 v4 covers 2016 hosts where 12 fast cores with ECC must deploy.
Frequently asked questions
What socket does the Intel Xeon E5-2666 v4 use?
It uses LGA 2011-v3 on C612 server boards.
How many cores does the Xeon E5-2666 v4 have?
Twelve cores and 24 threads, with 2.8 GHz base and up to 3.4 GHz boost.
Which graphics does the Xeon E5-2666 v4 include?
None. Serial and network manage the node.
What memory does the Xeon E5-2666 v4 support?
DDR4 with ECC in four channels.
When did the Xeon E5-2666 v4 launch?
2016 with Broadwell-EP server parts.
Sources and verification
- Intel Xeon E5-2666 v4 vs Xeon E5-2680 v4 (PassMark)
- Intel Xeon E5-2666 v4 Benchmarks (OpenBenchmarking)
Facts last checked against these sources on . Page last edited on .