Intel Xeon E5-4627 v3 socket: LGA 2011-v3

What the Xeon E5-4627 v3 is

The Xeon E5-4627 v3 is a frequency tuned Haswell-EP part on LGA 2011-v3 for latency sensitive 4S servers. Intel set 10 cores and 10 threads at 2.6 GHz base with turbo to 3.2 GHz. Twenty five megabytes of Smart Cache feed the cores. Power is 135 W on 22 nm from the second quarter of 2015. Hyper-Threading is off, so each core carries one thread with full resources.

Ten fast cores suit databases with per core licenses where thread count costs money. High base clocks beat throughput tuned parts in single socket bursts. Two QPI links tie up to four sockets. The 22 nm process with on die regulation holds power in dense chassis.

No integrated graphics exist. DDR4 with ECC over four channels feeds the node. Buyers pick the 4627 v3 where frequency per core matters more than total threads in a 4S Grantley system.

Socket and motherboard compatibility

The 4627 v3 fits LGA 2011-v3 on C612 4S boards with E5-4600 v3 firmware. The socket also carries HEDT and dual socket Xeons, but 4S routing and QPI config differ. Check the vendor matrix for stepping support before mixing nodes.

DDR4 registered ECC modules are required. The Socket vs chipset: what decides whether a CPU works guide covers platform concepts, while vendor docs decide DIMM maps. LGA 2011 without v3 never boots v3 Xeons.

Memory, PCIe and cooling

DDR4 ECC over four channels to 768 GB per socket suits licensed database nodes. Registered DIMMs allow full populations. Speeds reach 2133 MHz on top configs. Balance channels per socket for latency.

PCIe 3.0 with 40 lanes per socket in x4, x8 and x16 splits serves HBAs and networking. Frequency tuned nodes often need low latency networking more than accelerators. NUMA placement decides tail latency.

Cooling uses server heatsinks for 135 W continuous with front to back airflow. No boxed cooler ships. Ten full speed cores run hot, so inlet temperature control matters.

Upgrade paths

On the same socket the Intel Xeon E5-4655 v3 offers 6 faster cores at 2.9 GHz to 3.2 GHz for higher per core speed, while the Intel Xeon E5-4620 v3 gives 10 threaded cores at lower clocks for throughput. All share LGA 2011-v3 where firmware lists them.

A move to E5 v4 needs Broadwell-EP firmware. The 4627 v3 covers 4S frequency tuned Haswell-EP where HT off saves license cost.