LGA 2011

LGA 2011

Type	LGA
Chip form factors	Flip-chip land grid array (FCLGA)
Contacts	2011
FSB protocol	Intel QPI DMI 2.0
FSB frequency	1× to 2× QPI, DMI 2.0
Processors	Sandy Bridge-E/EP Ivy Bridge-E Haswell-E (LGA2011-v3) Haswell-EP (LGA2011-v3)
Predecessor	LGA 1366 LGA 1567
Memory support	DDR3 and DDR4
This article is part of the CPU socket series

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.^[1][2] 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.^[3][4] LGA 2011 also has to ensure platform scalability beyond eight cores and 20 MB of cache.^[5]

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, an updated generation of the socket and the successor of LGA 1567, is used for Ivy Bridge-EX (Xeon E7 v2)^[6] and Haswell-EX (Xeon E7 v3) CPUs, which were released in February 2014 and May 2015, respectively. LGA 2011-v3 (also referred to as LGA 2011-3) is another updated generation of the socket, used for Haswell-E and Haswell-EP CPUs,^[7] which were released in August and September 2014, respectively. Updated socket generations are physically similar to LGA 2011, but the used electrical signals and ILM keying prevent them from being backward compatible with older CPUs.^[8]

Physical design and socket generations

An LGA 2011-v3 socket

Intel CPU sockets use the so-called Independent Loading Mechanism (ILM) retention device that holds the CPU in place while applying an exact amount of force required for a CPU to be properly seated. As part of their design, ILMs have differently placed protrusions which are intended to mate with cutouts in CPU packagings. These protrusions, also known as ILM keying, have the purpose of preventing installation of incompatible CPUs into otherwise physically compatible sockets, and preventing ILMs to be mounted with a 180-degree rotation relative to the CPU socket.^[9]

Different variants (or generations) of the LGA 2011 socket and associated CPUs come with different ILM keying, which makes it possible to install CPUs only into generation-matching sockets. CPUs that are intended to be mounted into LGA 2011-0, LGA 2011-1 or LGA 2011-v3 sockets are all mechanically compatible regarding their dimensions and ball pattern pitches, but the designations of contacts are different between generations of the LGA 2011 socket and CPUs, which makes them electrically and logically incompatible. Original LGA 2011 socket is used for Sandy Bridge-E/EP and Ivy Bridge-E/EP processors, while LGA 2011-1 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 is used for Haswell-E and Haswell-EP CPUs, which were released in August and September 2014, respectively.^{[6][7][8][10]}

Two types of ILM exist, with different shapes and heatsink mounting hole patterns: square ILM (80×80 mm mounting pattern), and narrow ILM (56×94 mm mounting pattern). Square ILM is the standard type, while the narrow one is alternatively available for space-constrained applications.^[11][12] A matching heatsink is required for each ILM type.^[13][14]

Chipsets

Information for the Intel X79 (for desktop) and C600 series (for workstations and servers, codenamed Romley^[15]) chipsets is in the table below. The Romley (EP) platform was delayed approximately one quarter, allegedly due to a SAS controller bug.^[15]

The X79 appears to contain the same silicon as the C600 series, with ECS having enabled the SAS controller for one of their boards, even though SAS is not officially supported by Intel for X79.^[16]

Name	X79[17][18]	X99	C602J[19]	C602[20]	C604[21]	C606[22]	C608[23]
CPU Support	Sandy Bridge-E, Ivy Bridge-E[24]	Haswell-E	Sandy Bridge-EP (Xeon E5 1600/2600/4600 series), Ivy Bridge-EP (Xeon E5 1600/2600/4600 v2 series)
Memory standard and maximum slots	Quad-channel DDR3, up to two DIMMs per channel	Quad-channel DDR4, up to two DIMMs per channel	Quad-channel DDR3, supporting up to three DIMMs per memory channel of each CPU[25][26]
Overclocking	Yes	Yes	N/A
Embedded GPU	No	No	No
RAID 0/1/5/10	Yes	Yes	Yes[27]
Maximum USB ports (USB 3.0)	14 (0)[28]	14 (6)	14 (0)[27]
Maximum SATA ports (SATA 3.0, 6 Gbit/s)	6 (2)[28]	10 (10)	6 (2)[27]	6 (2) + 4 SCU SATA[27]	6 (2) + 4 SCU SAS/SATA[27]	6 (2) + 8 SCU SAS/SATA[27]
CPU-provided PCIe configuration	40 PCIe 3.0 lanes[29]	40 PCIe 3.0 lanes; 2 ×16 + 1 ×8, or 5 ×8	40 PCIe lanes per CPU[25]
Chipset-provided PCIe configuration	Eight PCIe 2.0 lanes		Eight PCIe 2.0 lanes[27]
PCI	Yes	No	Yes[27]
Intel Rapid Storage Technology	Yes	v13.1	Enterprise edition
Smart Response Technology	No	Yes	No
Intel vPro	No	No	Yes
Chipset TDP	7.8 W	6.5 W	8 W			12 W
Chipset lithography	65 nm	32 nm	65 nm
Release date	14 November 2011	29 August 2014	Q1 2012

Compatible processors

Desktop (Sandy Bridge-E/Ivy Bridge-E/Haswell-E)

Desktop processors for the LGA 2011 socket are listed in the table below.

• All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), TXT, Intel VT-x, Intel VT-d, Turbo Boost, AES-NI, Smart Cache, Hyper-threading, except the C1 stepping models, which lack VT-d.^[30]
• Sandy Bridge-E, Ivy Bridge-E and Haswell-E processors are not bundled with standard air-cooled CPU coolers. Intel is offering a standard CPU cooler, and a liquid-cooled CPU cooler, which are both sold separately.^[31]
• Sandy Bridge-E and Ivy Bridge-E processors are compatible with the Intel X79 chipset.
• Haswell-E processors are compatible with the Intel X99 chipset.

Name	Cores	Threads	Frequency	Turbo Boost	Multiplier	L2 cache	L3 cache	PCIe 2.0 or 3.0 lanes	TDP	Release date[32]	Price (US)[33]
Sandy Bridge-E
Core i7-3820	4	8	3.60 GHz	3.80 GHz	Partially unlocked	4 × 256 KB	10 MB	40 (PCIe 2.0)	130 W	14 February 2012	$305 [34]
Core i7-3930K	6	12	3.20 GHz		Unlocked	6 × 256 KB	12 MB			14 November 2011	$555[35]
Core i7-3960X Extreme Edition			3.30 GHz	3.90 GHz			15 MB				$990[35]
Core i7-3970X Extreme Edition			3.50 GHz	4.00 GHz					150 W	Q4 2012	$999
Ivy Bridge-E
Core i7-4820K	4	8	3.70 GHz	3.90 GHz	Unlocked	4 × 256 KB	10 MB	40 (PCIe 3.0)	130 W	Q3 2013	$323[36]
Core i7-4930K	6	12	3.40 GHz			6 × 256 KB	12 MB				$583[36]
Core i7-4960X Extreme Edition			3.60 GHz	4.00 GHz			15 MB				$999[36]
Haswell-E
Core i7-5820K[37]	6	12	3.3 GHz	3.6 GHz	Unlocked	6 x 256 KB	15 MB	28 (PCIe 3.0)	140 W	29 August 2014	$396
Core i7-5930K[38]			3.5 GHz	3.7 GHz				40 (PCIe 3.0)			$550
Core i7-5960X Extreme Edition[39]	8	16	3.0 GHz	3.5 GHz		8 × 256 KB	20 MB				$999

¹ The X79 chipset allows for increasing the base clock (BCLK), Intel calls it CPU Strap, by 1.00×, 1.25×, 1.66× or 2.50×. The CPU frequency is derived by the BCLK times the CPU multiplier.

Server (Xeon E5-16xx/26xx)

Server processors for the LGA 2011 socket are listed in the table below.

• All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), TXT, Intel VT-x, Intel VT-d, AES-NI, Smart Cache. Not all support Hyper-threading and Turbo Boost.

Name	Cores	Threads	Frequency	Turbo Boost	Multiplier	L2 cache	L3 cache	TDP	Release date	Price (US)[40][41]
Xeon E5-1620	4	8	3.60 GHz	3.90 GHz	38	4 × 256 KB	10 MB	130 W	Q1 2012[42][43]	$294
Xeon E5-1650	6	12	3.20 GHz	3.80 GHz		6 × 256 KB	12 MB			$583
Xeon E5-1660			3.30 GHz	3.90 GHz	39		15 MB			$1080
Xeon E5-2603	4	4	1.8 GHz	Not supported[44]	18	4 × 256 KB	10 MB	80 W	Q1 2012	$198
Xeon E5-2609			2.4 GHz	Not supported[45]	24					$294
Xeon E5-2620	6	12	2.0 GHz	2.5 GHz	25	6 × 256 KB	15 MB	95 W		$406
Xeon E5-2630			2.3 GHz	2.8 GHz	28					$612
Xeon E5-2630L			2.0 GHz	2.5 GHz	20			60 W		$662
Xeon E5-2637	2	4	3.0 GHz	3.5 GHz	30	2 × 256 KB	5 MB	80 W		$885
Xeon E5-2640	6	12	2.5 GHz	3.0 GHz		6 × 256 KB	15 MB	95 W
Xeon E5-2643	4	8	3.3 GHz	3.5 GHz	33	4 × 256 KB	10 MB	130 W
Xeon E5-2650	8	16	2.0 GHz	2.8 GHz	28	8 × 256 KB	20 MB	95 W		$1107
Xeon E5-2658			2.1 GHz	2.4 GHz	N/A					$1141
Xeon E5-2650L			1.8 GHz	2.3 GHz	18			70 W		$1107
Xeon E5-2660			2.2 GHz	3.0 GHz	30			95 W		$1329
Xeon E5-2665			2.4 GHz	3.1 GHz	31			115 W		$1440
Xeon E5-2667	6	12	2.9 GHz	3.5 GHz	29	6 × 256 KB	15 MB	130 W		$1552
Xeon E5-2670	8	16	2.6 GHz	3.3 GHz	33	8 × 256 KB	20 MB	115 W
Xeon E5-2680			2.7 GHz	3.5 GHz	35			130 W		$1723
Xeon E5-2687W			3.1 GHz	3.8 GHz	31			150 W		$1885
Xeon E5-2690			2.9 GHz		38			135 W		$2057

Server (Xeon E5-16xx/26xx v3)

Server processors for the LGA 2011-v3 socket are listed in the tables below.^[46] As one of the significant changes from the previous generation, they support DDR4 memory.

Single socket

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-1680 v3	8	16	3.2 GHz	3.8 GHz	20 MB	5 GT/s	140 W	1333/1600/1866/2133
Xeon E5-1660 v3	8	16	3 GHz	3.5 GHz	20 MB	5 GT/s	140 W	1333/1600/1866/2133
Xeon E5-1650 v3	6	12	3.5 GHz	3.8 GHz	15 MB	5 GT/s	140 W	1333/1600/1866/2133
Xeon E5-1630 v3	4	8	3.7 GHz	3.8 GHz	10 MB	5 GT/s	140 W	1333/1600/1866/2133
Xeon E5-1620 v3	4	8	3.5 GHz	3.6 GHz	10 MB	5 GT/s	140 W	1333/1600/1866/2133

Dual socket – mainstream

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-2699 v3	18	36	2.3 GHz	3.6 GHz	45 MB	9.6 GT/s	145 W	1600/1866/2133
Xeon E5-2698 v3	16	32	2.3 GHz	3.6 GHz	40 MB	9.6 GT/s	135 W	1600/1866/2133
Xeon E5-2697 v3	14	28	2.6 GHz	3.6 GHz	35 MB	9.6 GT/s	145 W	1600/1866/2133
Xeon E5-2695 v3	14	28	2.3 GHz	3.3 GHz	35MB	9.6 GT/s	120 W	1600/1866/2133
Xeon E5-2690 v3	12	24	2.6 GHz	3.5 GHz	30 MB	9.6 GT/s	135 W	1600/1866/2133
Xeon E5-2683 v3	14	28	2 GHz	3 GHz	35 MB	9.6 GT/s	120 W	1600/1866/2133
Xeon E5-2680 v3	12	24	2.5 GHz	3.3 GHz	30 MB	9.6 GT/s	120 W	1600/1866/2133
Xeon E5-2670 v3	12	24	2.3 GHz	3.1 GHz	30 MB	9.6 GT/s	120 W	1600/1866/2133
Xeon E5-2660 v3	10	20	2.6 GHz	3.3 GHz	25 MB	9.6 GT/s	105 W	1600/1866/2133
Xeon E5-2650 v3	10	20	2.3 GHz	3 GHz	25 MB	9.6 GT/s	105 W	1600/1866/2133
Xeon E5-2640 v3	8	16	2.6 GHz	3.4 GHz	20 MB	8 GT/s	90 W	1600/1866
Xeon E5-2630 v3	8	16	2.4 GHz	3.2 GHz	20 MB	8 GT/s	85 W	1600/1866
Xeon E5-2620 v3	6	12	2.4 GHz	3.2 GHz	15 MB	8 GT/s	85 W	1600/1866
Xeon E5-2609 v3	6	6	1.9 GHz		15 MB	6.4 GT/s	85 W	1600
Xeon E5-2603 v3	6	6	1.6 GHz		15 MB	6.4 GT/s	85 W	1600

Dual socket – frequency-optimised

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-2667 v3	8	16	3.2 GHz	3.6 GHz	20 MB	9.6 GT/s	135 W	1600/1866/2133
Xeon E5-2643 v3	6	12	3.4 GHz	3.7 GHz	20 MB	9.6 GT/s	135 W	1600/1866/2133
Xeon E5-2637 v3	4	8	3.5 GHz	3.7 GHz	15 MB	9.6 GT/s	135 W	1600/1866/2133
Xeon E5-2623 v3	4	8	3 GHz	3.5 GHz	10 MB	8 GT/s	105 W	1600/1866

Dual socket – low power

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-2650L v3	12	24	1.8 GHz	2.5 GHz	30 MB	9.6 GT/s	65 W	1600/1866/2133
Xeon E5-2630L v3	8	16	1.8 GHz	2.9 GHz	20 MB	8 GT/s	55 W	1600/1866

Dual socket – workstation

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-2687W v3	10	20	3.1 GHz	3.5 GHz	25 MB	9.6 GT/s	160 W	1600/1866/2133

Dual socket – storage and communications

Name	Cores	Threads	Frequency	Turbo Boost	Cache	Bus speed	TDP	DDR4 speed
Xeon E5-2658 v3	12	24	2.2 GHz	2.9 GHz	30 MB	9.6 GT/s	105 W	1600/1866/2133
Xeon E5-2648L v3	12	24	1.8 GHz	2.5 GHz	30 MB	9.6 GT/s	75 W	1600/1866/2133
Xeon E5-2628L v3	10	20	2 GHz	2.5 GHz	25 MB	8 GT/s	75 W	1600/1866
Xeon E5-2618L v3	8	16	2.3 GHz	3.4 GHz	20 MB	8 GT/s	75 W	1600/1866
Xeon E5-2608L v3	6	12	2 GHz		15 MB	6.4 GT/s	52 W	1600/1866

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