LGA 1356 socket: CPUs, chipsets and cooler fit
LGA 1356 is the Intel server socket for single and dual socket low end servers on the Romley-EN platform. It is also called Socket B2 and carries 1356 contacts with a 45 × 42.5 mm FCLGA1356 package. Intel launched the socket in the second quarter of 2012 with Sandy Bridge-EN, followed by Ivy Bridge-EN in January 2014. Boards scale to two sockets with one QPI link per CPU.
Quick facts
| Maker | Intel |
|---|---|
| Package type | LGA |
| Contacts | 1,356 |
| Package size | 45 × 42.5 mm |
| Introduced | May 2012 |
| Status | Legacy |
| Memory | DDR3-800 to 1600 with ECC, three channels |
| PCIe from the CPU | PCIe 3.0, 24 lanes per socket |
| Cooler mounting holes | Board specific (server heatsink) |
| Replaces | LGA 1366 |
| Replaced by | LGA 2011-v3 |
Overview
The socket exists for dense low power servers where socket count and memory per dollar beat peak clocks. Core counts span two cores on Pentium 1400 parts through four to eight cores on Xeon E5-2400 parts to ten cores on top E5-2470 v2. Cache scales with cores from 5 MB on Pentium through 10 MB on quad Xeon to 25 MB on ten core parts. Power spans 40 W on Pentium 1405 v2 through 60 W on low voltage Xeon to 95 W on standard Xeon. Memory reaches DDR3-1600 with ECC over three channels per socket. PCIe runs at version 3.0 with 24 lanes per socket.
Because the platform covers Sandy Bridge-EN and Ivy Bridge-EN across C600 series boards, firmware must list the exact stepping. Pentium parts serve single socket micro servers with basic I/O, while Xeon E5-2400 v2 parts serve dual socket virtual hosts. Successor Grantley designs moved high end servers to larger sockets, while LGA 1356 remains a used market platform for low power racks.
Processor generations
| Codename | Marketing name | Years | Notes |
|---|---|---|---|
| Sandy Bridge-EN | Xeon E5-1400 and E5-2400 series | 2012 | 32 nm server parts for single and dual socket boards with DDR3 and 24 PCIe lanes, launched in May 2012. |
| Ivy Bridge-EN | Xeon E5-1400 v2 and E5-2400 v2 series | 2014 | 22 nm server parts including Pentium 1403 v2 and 1405 v2 plus Xeon E5-1428L v2, launched in January 2014 with DDR3-1600 and 24 PCIe 3.0 lanes. |
Chipsets for LGA 1356
C600 series
Server boards for Sandy Bridge-EN and Ivy Bridge-EN on the Romley-EN platform.
| Chipset | Segment | Notes |
|---|---|---|
| C602 | Server | Romley-EN platform controller for single and dual socket LGA 1356 boards. |
Who LGA 1356 serves
LGA 1356 fits single socket micro servers and dual socket low end racks where power per thread decides the build. Pentium 1403 v2 at 2.6 GHz and 80 W and Pentium 1405 v2 at 1.4 GHz and 40 W suit cold storage and edge nodes with basic DDR3. Xeon E5-1428L v2 with six cores and 12 threads at 2.2 GHz to 2.7 GHz and 60 W consolidates virtual guests with 15 MB of cache. Standard E5-2400 v2 parts to ten cores suit denser hosts.
Within the socket the choice is cores against watts at fixed three channel memory. Low voltage L suffix parts trim power for dense chassis. Standard parts raise clocks for fewer guests per socket. Both share DDR3 ECC memory and C600 boards, so density and power decide more than chipset brand.
Memory and PCIe
Memory support is DDR3-800 to 1600 with ECC over three channels per socket and up to 384 GB on Pentium 1403 v2 class boards with registered DIMMs. Three channels feed each socket with up to 38.4 GB/s on 1600 parts. Even populations across channels protect bandwidth for guests. DDR3 and DDR4 never mix on one board.
PCIe 3.0 with 24 lanes per socket in x4, x8 and x16 splits serves HBAs, networking and accelerators. One QPI link per CPU at up to 8 GT/s ties two sockets, against two links on LGA 2011 E5 parts. I/O placement should follow NUMA locality in 2S builds. Cooling follows vendor qualified server heatsinks with front to back airflow and no retail cooler.
CPUs on LGA 1356
25 processor pages in the database, newest first.
| Processor | Cores / threads | Base / boost | TDP | Launched |
|---|---|---|---|---|
| Intel Pentium 1403 V2 | 2 / 2 | 2.6 GHz | 80 W | Jan 2014 |
| Intel Pentium 1405 V2 | 2 / 2 | 1.4 GHz | 40 W | Jan 2014 |
| Intel Xeon E5-1410 v2 | 4 / 8 | 2.8 / 3.2 GHz | 80 W | Jan 2014 |
| Intel Xeon E5-1428L v2 | 6 / 12 | 2.2 / 2.7 GHz | 60 W | Jan 2014 |
| Intel Xeon E5-2403 v2 | 4 / 4 | 1.8 GHz | 80 W | Sep 2013 |
| Intel Xeon E5-2407 v2 | 4 / 4 | 2.4 GHz | 80 W | Sep 2013 |
| Intel Xeon E5-2420 v2 | 6 / 12 | 2.2 / 2.7 GHz | 80 W | Sep 2013 |
| Intel Xeon E5-2430 v2 | 6 / 12 | 2.5 / 3.0 GHz | 80 W | Sep 2013 |
| Intel Xeon E5-2440 v2 | 8 / 16 | 1.9 / 2.4 GHz | 95 W | Sep 2013 |
| Intel Xeon E5-2450 v2 | 8 / 16 | 2.5 / 3.3 GHz | 95 W | Sep 2013 |
| Intel Xeon E5-2470 v2 | 10 / 20 | 2.4 / 3.2 GHz | 95 W | Sep 2013 |
| Intel Xeon E5-1410 | 4 / 8 | 2.8 / 3.2 GHz | 80 W | May 2012 |
| Intel Xeon E5-1428L | 6 / 12 | 1.8 GHz | 60 W | May 2012 |
| Intel Xeon E5-2403 | 4 / 4 | 1.8 GHz | 80 W | May 2012 |
| Intel Xeon E5-2407 | 4 / 4 | 2.2 GHz | 80 W | May 2012 |
| Intel Xeon E5-2418L | 4 / 8 | 2.0 / 2.1 GHz | 50 W | May 2012 |
| Intel Xeon E5-2420 | 6 / 12 | 1.9 / 2.4 GHz | 95 W | May 2012 |
| Intel Xeon E5-2428L | 6 / 12 | 1.8 / 2.0 GHz | 60 W | May 2012 |
| Intel Xeon E5-2430 | 6 / 12 | 2.2 / 2.7 GHz | 95 W | May 2012 |
| Intel Xeon E5-2430L | 6 / 12 | 2.0 / 2.5 GHz | 60 W | May 2012 |
| Intel Xeon E5-2440 | 6 / 12 | 2.4 / 2.9 GHz | 95 W | May 2012 |
| Intel Xeon E5-2448L | 8 / 16 | 1.8 / 2.1 GHz | 70 W | May 2012 |
| Intel Xeon E5-2450 | 8 / 16 | 2.1 / 2.9 GHz | 95 W | May 2012 |
| Intel Xeon E5-2450L | 8 / 16 | 1.8 / 2.3 GHz | 70 W | May 2012 |
| Intel Xeon E5-2470 | 8 / 16 | 2.3 / 3.1 GHz | 95 W | May 2012 |
Frequently asked questions
Which processors fit LGA 1356?
Sandy Bridge-EN and Ivy Bridge-EN server parts including Pentium 1400 series and Xeon E5-1400 and E5-2400 v1 and v2. Desktop LGA 2011 parts need LGA 2011-v3 and E7 parts need larger sockets. Do not confuse this LGA socket with BGA 1356 style BGA packages of similar number, which are soldered laptop parts.
Is LGA 1356 the same as LGA 2011?
No. LGA 1356 has 1356 contacts for dual socket low end servers with three DDR3 channels and one QPI link. LGA 2011 has 2011 contacts for high end servers and HEDT with four channels and two QPI links. Parts never move between them.
What memory does LGA 1356 use?
DDR3-800 to 1600 with ECC over three channels per socket. Registered DIMMs allow large populations on Xeon boards. Balance DIMMs across channels for bandwidth. Pentium boards top out lower per manual.
How many PCIe lanes does LGA 1356 provide?
PCIe 3.0 with 24 lanes per socket in x4, x8 and x16 splits for networking, storage and accelerators. Single QPI link ties two sockets on dual boards. I/O placement should respect NUMA on 2S systems.
Sources and verification
- LGA 1356 (Wikipedia, contacts and Ivy Bridge-EN data)
- Intel Pentium 1403 v2 specifications (Intel, FCLGA1356 and DDR3)
- Intel Xeon E5 v2 Datasheet Vol 1 (Intel, C600 series platform)
Facts last checked against these sources on . Page last edited on .