Romley
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| Type | LGA |
|---|---|
| Chip form factors | Flip-chip land grid array (FCLGA) |
| Contacts | 2011 |
| FSB protocol | |
| FSB frequency | 1× to 2× QPI, DMI 2.0 |
| Processors |
|
| Predecessor | |
| Successor | |
| Memory support | DDR3 and DDR4 |
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This article is part of the CPU socket series |
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LGA 2011, also called Socket R, is a CPU socket by Intel. Released on 14 November 2011, it replaces Intel's LGA 1366 (Socket B) and LGA 1567 in the performance and high-end desktop and server platforms. The socket has 2011 protruding pins that touch contact points on the underside of the processor.
The LGA 2011 socket uses QPI to connect the CPU to additional CPUs. DMI 2.0 is used to connect the processor to the PCH. The memory controller and 40 PCI Express (PCIe) lanes are integrated on the CPU. On a secondary processor an extra ×4 PCIe interface replaces the DMI interface. As with its predecessor LGA 1366, there is no provisioning for integrated graphics. This socket supports four DDR3 or DDR4 SDRAM memory channels with up to three unbuffered or registered DIMMs per channel, as well as up to 40 PCI Express 2.0 or 3.0 lanes. LGA 2011 also has to ensure platform scalability beyond eight cores and 20 MB of cache.
The LGA 2011 socket is used by Sandy Bridge-E/EP and Ivy Bridge-E/EP processors with the corresponding X79 (E – enthusiast class) and C600-series (EP – Xeon class) chipsets. LGA 2011-1 (Socket R2), an updated generation of the socket and the successor of LGA 1567, is used for Ivy Bridge-EX (Xeon E7 v2) and Haswell-EX (Xeon E7 v3) CPUs, which were released in February 2014 and May 2015, respectively. LGA 2011-v3 (Socket R3, also referred to as LGA 2011-3) is another updated generation of the socket, used for Haswell-E and Haswell-EP CPUs, which were released in August and September 2014, respectively. Updated socket generations are physically similar to LGA 2011, but different electrical signals and ILM keying prevent backward compatibility with older CPUs.
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