Intel Xeon E5-4640 v3 socket: LGA 2011-v3
The Intel Xeon E5-4640 v3 uses the LGA 2011-v3 socket on C612 4S boards. It is a 12 core Haswell-EP part with 24 threads from 1.9 GHz to 2.6 GHz at 105 W.
- Socket
- LGA 2011-v3
- Launched
- June 2015
- Cores and threads
- 12 and 24
- Base power
- 105 W
- Codename
- Haswell-EP
- Segment
- Server
- Family
- Intel Xeon E5
- Clocks
- 1.9 / 2.6 GHz
Intel Xeon E5-4640 v3 specifications
| Cores | 12 |
|---|---|
| Threads | 24 |
| Core architecture | Haswell cores on 22 nm |
| Clocks | 1.9 GHz base, up to 2.6 GHz turbo |
| Cache | 30 MB Smart Cache |
| Processor base power (TDP) | 105 W |
| Manufacturing process | 22 nm |
| Memory support | DDR4 ECC, four channels, up to 768 GB |
| PCI Express | PCIe 3.0, 40 lanes |
| Integrated graphics | None |
| ECC memory | Supported |
| Package | FCLGA2011 (LGA 2011-v3) |
Motherboard and chipset compatibility
Intel Xeon E5-4640 v3 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 |
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 E5-4640 v3 is
The Xeon E5-4640 v3 is a low clock 12 core Haswell-EP part on LGA 2011-v3 for efficient 4S scale out. Intel set 12 cores and 24 threads at 1.9 GHz base with turbo to 2.6 GHz. Thirty megabytes of Smart Cache cover workers. Power is 105 W on 22 nm from the second quarter of 2015.
Low clocks favor throughput per watt across many nodes. Twenty four threads per socket handle parallel web tiers. Two QPI links at 8 GT/s tie four sockets. The 105 W envelope fits denser racks than faster 12 core options.
No integrated graphics exist. DDR4 ECC over four channels feeds guests. Buyers pick the 4640 v3 where node count with modest clocks beats fewer faster nodes on power budgets.
Socket and motherboard compatibility
The 4640 v3 fits LGA 2011-v3 on C612 4S Grantley boards. Firmware must list E5-4600 v3 value SKUs. Server ECC boards differ from desktop X99. Check vendor DIMM guidance for 4S builds.
Registered ECC memory is standard. The Socket vs chipset: what decides whether a CPU works guide covers concepts, vendor manuals decide layouts. LGA 2011 without v3 never boots.
Memory, PCIe and cooling
DDR4 ECC over four channels to 768 GB per socket suits scale out hosts. Value speeds match the modest clocks. Even channel fills protect bandwidth.
PCIe 3.0 with 40 lanes per socket serves networking and storage. Scale out fabrics decide job speed. NUMA balance across sockets matters.
Cooling uses 105 W server heatsinks with front to back airflow. Low clocks ease thermals. Dense rows still need aisle management.
Upgrade paths
On the same socket the Intel Xeon E5-4650 v3 at 2.1 GHz to 2.8 GHz nearby adds clocks for the same power, while the Intel Xeon E5-4610 v3 at fixed 1.7 GHz covers lower power. All share LGA 2011-v3 where listed.
A v4 move needs Broadwell-EP firmware. The 4640 v3 covers efficient 12 core 4S where watts cap density.
Frequently asked questions
What socket does the Intel Xeon E5-4640 v3 use?
It uses LGA 2011-v3 on C612 4S boards.
How many cores does the Xeon E5-4640 v3 have?
12 cores and 24 threads at 1.9 GHz base with turbo to 2.6 GHz.
What is the TDP of the Xeon E5-4640 v3?
105 W.
When did the Xeon E5-4640 v3 launch?
June 2015.
Sources and verification
- Intel Xeon Processor E5-4640 v3 specifications (Intel)
- Intel Xeon E5-4600 v3 Product Family Brief (Intel)
Facts last checked against these sources on . Page last edited on .