LGA 2011 Socket Pin Layout

LGA 2011 / Socket R was used for Sandy Bridge-E/EP and Ivy Bridge-E/EP processors beginning in 2011 (the name comes from the number of pins, not the year).

Even in 2023 this platform still has some uses for a home server: used motherboards are relatively easy to obtain, and they’re the last consumer platform that accepts 8x DDR3 DIMMs. While similar used server platforms are also available they tend to be rarer and more expensive, in addition to commonly coming in non-standard or inconvenient form factors.

The motherboards contacts (lands) need to be handled gently. If a contact breaks then you might still be ok - if for example it’s a RSVD contact. If it’s a memory contact then that channel won’t work but the rest should be ok.

Intel created two subsequent revisions — LGA 2011-1 (aka Socket R2) and LGA 2011-3 (aka Socket R3). Those are not pin-compatible. The original LGA 2011 was retrospectively renamed LGA 2011-0 to reduce confusion, but unqualified “LGA 2011” references still abound.

Intel’s documentation is not the easiest to follow and simplified diagrams have been created for other sockets (eg LGA 1151, LGA 1200) but I have been unable to find any for LGA 2011.

LGA 2011 Pin Map

Information is taken from

• page 19 of Intel® Core™ i7 Processor Families for the LGA2011-0 Socket Thermal Mechanical Specification and Design Guide
• page 71 of Intel® Core™ i7 Processor Family for the LGA-2011 Socket Datasheet, Volume 1

This table is quite large any may be hard to read on mobile devices.

Legend

• Other
• JTAG
• DDR0
• DDR1
• DDR2
• DDR3
• DMI
• PCIe
• PCIe1
• PCIe2
• PCIe3
• GND
• PWR
• PWR Sense
• RSVD
• Serial VID
• SysClock

	A	B	C	D	E	F	G	H	J	K	L	M	N	P	R	T	U	V	W	Y	AA	AB	AC	AD	AE	AF	AG	AH	AJ	AK	AL	AM	AN	AP	AR	AT	AU	AV	AW	AY	BA	BB	BC	BD	BE	BF	BG	BH	BJ	BK	BL	BM	BN	BP	BR	BT	BU	BV	BW	BY	CA	CB
58																																																																																									58
57																																																																																									57
56																																																																																									56
55																																																																																									55
54																																																																																									54
53																																																																																									53
52																																																																																									52
51																																																																																									51
50																																																																																									50
49																																																																																									49
48																																																																																									48
47																																																																																									47
46																																																																																									46
45																																																																																									45
44																																																																																									44
43																																																																																									43
42																																																																																									42
41																																																																																									41
40																																																																																									40
39																																																																																									39
38																																																																																									38
37																																																																																									37
36																																																																																									36
35																																																																																									35
34																																																																																									34
33																																																																																									33
32																																																																																									32
31																																																																																									31
30																																																																																									30
29																																																																																									29
28																																																																																									28
27																																																																																									27
26																																																																																									26
25																																																																																									25
24																																																																																									24
23																																																																																									23
22																																																																																									22
21																																																																																									21
20																																																																																									20
19																																																																																									19
18																																																																																									18
17																																																																																									17
16																																																																																									16
15																																																																																									15
14																																																																																									14
13																																																																																									13
12																																																																																									12
11																																																																																									11
10																																																																																									10
9																																																																																									9
8																																																																																									8
7																																																																																									7
6																																																																																									6
5																																																																																									5
4																																																																																									4
3																																																																																									3
2																																																																																									2
1																																																																																									1
																											AE	AF	AG	AH	AJ	AK	AL	AM	AN	AP	AR	AT	AU	AV	AW	AY	BA	BB	BC	BD	BE	BF	BG	BH	BJ	BK	BL	BM	BN	BP	BR	BT	BU	BV	BW	BY	CA	CB	CC	CD	CE	CF	CG	CH	CJ	CK	CL	CM	CN	CP	CR	CT	CU	CV	CW	CY	DA	DB	DC	DD	DE	DF

Statistics

Breakdown of pins by category

Category	Count	%
Ground	550	27.3%
DDR	546	27.2%
Power (+Sense)	326	16.2%
PCIe	166	8.3%
DMI	16	0.8%
JTAG	16	0.8%
System Clock	6	0.3%
Serial VID	3	0.1%
Other	21	1.0%