Intel Xeon E3-1240L v5 socket: LGA 1151
The Intel Xeon E3-1240L v5 uses the LGA 1151 socket on C236 workstation boards. It is a 4 core Skylake-DT part with 8 threads from 2.1 GHz to 3.2 GHz at 25 W with no integrated graphics.
- Socket
- LGA 1151
- Launched
- October 2015
- Cores and threads
- 4 and 8
- Base power
- 25 W
- Codename
- Skylake-DT
- Segment
- Workstation
- Family
- Intel Xeon E3
- Clocks
- 2.1 / 3.2 GHz
Intel Xeon E3-1240L v5 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Skylake cores on 14 nm |
| Clocks | 2.1 GHz base, up to 3.2 GHz turbo |
| Cache | 8 MB Smart Cache |
| Processor base power (TDP) | 25 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4 and DDR3L ECC, two channels, up to 64 GB |
| PCI Express | PCIe 3.0, 16 lanes |
| Integrated graphics | None |
| ECC memory | Supported |
| Package | LGA 1151 (FCLGA1151) |
Motherboard and chipset compatibility
Intel Xeon E3-1240L v5 needs a motherboard with a LGA 1151 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C230 series: C236 | C236 | 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 1151.
LGA 1151 at a glance
| Type | LGA, 1,151 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | August 2015 |
| Memory | DDR4 on most boards (some early boards use DDR3L). DDR4 only on the second revision |
| Cooler mounting holes | 75 × 75 mm |
What the Xeon E3-1240L v5 is
The Xeon E3-1240L v5 is a low power Skylake workstation part on LGA 1151 for compact always on servers. Intel set 4 cores and 8 threads at 2.1 GHz base with turbo to 3.2 GHz. Eight megabytes of Smart Cache cover services. Power is 25 W on 14 nm from October 2015. No integrated graphics exist.
The 25 W envelope with 8 threads suits fanless leaning firewalls and NAS heads with BMC graphics. Turbo covers bursts while steady serving holds base. Low base clocks protect tiny chassis. ECC over two channels guards always on data.
DDR4 and DDR3L ECC to 64 GB feed the node. Buyers pick the 1240L v5 where 8 workstation threads must fit 25 W on C236.
Socket and motherboard compatibility
The 1240L v5 fits LGA 1151 on C236 compact workstation boards. The socket C236 table covers Skylake-DT. Low power firmware keeps fans slow. Consumer boards lack E3 validation.
ECC UDIMMs or SODIMMs depend on board size. LGA 1150 never boots Skylake. BMC graphics cover setup.
Memory, PCIe and cooling
DDR4 and DDR3L ECC over two channels to 64 GB suit compact nodes. Low power memory options help thermals. ECC is required.
PCIe 3.0 with 16 lanes from the CPU serves NICs and flash. Compact nodes use lanes for network expansion. A small SSD mirror holds configs.
Cooling uses 25 W low profile sinks. Quiet operation suits offices. Sealed boxes need validated airflow.
Upgrade paths
On the same socket the Intel Xeon E3-1235L v5 at 2.0 GHz to 3.0 GHz with 4 threads nearby trades threads for graphics, while the Intel Xeon E3-1260L v5 at 2.9 GHz base above adds speed for 45 W. All share C236 boards where listed.
A move to E3 v6 needs new firmware. The 1240L v5 holds low power 8 thread duty in Skylake workstations.
Frequently asked questions
What socket does the Intel Xeon E3-1240L v5 use?
It uses LGA 1151 on C236 workstation boards.
How many cores does the Xeon E3-1240L v5 have?
4 cores and 8 threads at 2.1 GHz base with turbo to 3.2 GHz.
Which graphics does the Xeon E3-1240L v5 include?
None.
What is the TDP of the Xeon E3-1240L v5?
25 W.
Sources and verification
- Intel Xeon Processor E3-1240L v5 specifications (Intel)
- Intel Xeon E3-1200 v5 workstation family brief (Intel, low power SKUs)
Facts last checked against these sources on . Page last edited on .