Intel Xeon E5-2648L v3 socket: LGA 2011-v3

What the Xeon E5-2648L v3 is

The Xeon E5-2648L v3 is a low voltage Haswell-EP twelve core for dense efficient servers on LGA 2011-v3. Intel set twelve cores and 24 threads at 1.8 GHz base with turbo to 2.5 GHz. Thirty megabytes of Smart Cache cover many guests per watt. Power is only 75 W on 22 nm from September 2014. The L suffix marks low power for racks that cap energy while keeping thread counts high.

Twelve cores with 24 threads pack the most threads per watt of the twelve core line for scale out clouds. Low clocks sip power while cache covers tenants. ECC DDR4 guards data. No integrated graphics exist. Fabric and SSDs shape throughput more than peak clocks. Buyers pick the L where 120 W parts would exceed rack power but twelve threads are still needed.

DDR4 ECC over four channels feeds each socket with two QPI links between dual nodes. The mix is a server socket for dense operators who buy threads per watt at 75 W.

Socket and motherboard compatibility

The E5-2648L v3 fits LGA 2011-v3 on C612 Grantley boards with low power support. Vendor tables list L parts with 75 W guidance. Check the minimum BIOS with v3 microcode. X99 desktop boards never suit low voltage server chips.

ECC RDIMMs over four channels carry memory. The Socket vs chipset: what decides whether a CPU works guide is desktop focused, so use server population rules. Cooling uses vendor 75 W heatsinks with rack airflow.

A standard 120 W twelve core on the same socket adds clocks where power allows. Confirm cooling before swapping L for standard parts.

Memory, PCIe and cooling

DDR4 ECC quad channel per socket suits efficient guests. Even maps protect NUMA fairness. Large RDIMMs reach high counts. Speed steps with population per manual.

Forty PCIe lanes per socket feed NICs and HBAs for scale out nodes. Dual socket I/O should respect NUMA locality. Vendor slot maps guide choices.

Vendor 75 W cooling sustains loads quietly with cool inlets. No retail cooler exists. Turbo to 2.5 GHz needs per core headroom.

Upgrade paths

On the same socket the Intel Xeon E5-2680 v3 at 2.5 GHz to 3.3 GHz is a higher clock 120 W step on similar boards. The Intel Xeon E5-2650L v3 with twelve slower threads is an even lower power sibling. Both share C612 mounting.

Newer efficient sockets replace Grantley. The E5-2648L v3 covers dense hosts where twelve cores at 75 W are required.