Socket 1155 / Socket H2 / Socket LGA1155

Socket 1155, also called LGA1155, or socket H2, is a Land Grid Array socket that superseded socket 1156. The LGA1155 was introduced in January 2011 along with second-generation Core CPUs, built on Sandy Bridge microarchitecture. The socket 1155 (H2) was also utilized for Ivy Bridge microprocessors, that were launched in 2012. The LGA1155 works with the latest generations of Intel Celeron, Pentium, Core i3/i5/i7 and Xeon desktop and server processors, that have up to 4 CPU cores, up to 8 MB of L3 cache, and operate at frequencies ranging from 1.2 GHz to 3.7 GHz. The socket H2 supports dual-channel DDR3 memory with data rates up to 1600 MHz, Direct Media Interface 2.0 running at 5 GT/s, and PCI Express 2.0 and 3.0 interfaces. Reportedly, the LGA1155 will be replaced with socket 1150 in 2013.

LGA1155 socket - top viewLGA1155 socket - view with CPULGA1155 socket - side view

The size of the socket without Independent Loading Mechanism (ILM) is 1.67" x 1.67" (4.25 cm x 4.25 cm). The socket H2 has 1155 contacts arranged as a grid 40 x 40 contacts with 24 x 16 section de-populated in the center, and with 61 land contacts depopulated mostly from the socket corners and socket edges. Visually, the contacts look like two L-shaped sections, opposing each other. The socket 1155 is rated at minimum 20 processor insertion and removal operations.

Supported processors

All processors, listed below, physically fit into the socket 1155, although not all of them may be supported. For that reason, before buying a new CPU please always make sure that the CPU is compatible with your motherboard. To determine what microprocessors are supported by a specific motherboard or computer please see "Upgrading socket 1155 motherboards" section below.

ModelBox part numbersTechnology
(micron)
CoresFrequency
(MHz)
Turbo
freq.
(MHz)
L2 cache
(KB)
L3 cache
(KB)
TDP
(Watt)
Celeron G440
BX80623G440
BXC80623G440
0.03211600 256102435
Celeron G460
BX80623G460
BXC80623G460
0.03211800 256153635
Celeron G465
BX80623G465
BXC80623G465
0.03211900 256153635
Celeron G470
BX80623G470
0.03212000 256153635
Celeron G530T 0.03222000 512204835
Celeron G540T 0.03222100 512204835
Celeron G550T 0.03222200 512204835
Celeron G1610T 0.02222300 512204835
Celeron G1620T 0.02222400 512204835
Celeron G530
BX80623G530
BXC80623G530
0.03222400 512204865
Celeron G540
BX80623G540
BXC80623G540
0.03222500 512204865
Celeron G1610
BX80637G1610
BXC80637G1610
0.02222600 512204855
Celeron G550
BX80623G550
BXC80623G550
0.03222600 512204865
Celeron G1620
BX80637G1620
BXC80637G1620
0.02222700 512204855
Celeron G555
BX80623G555
BXC80623G555
0.03222700 512204865
Celeron G1630
BX80637G1630
0.02222800 512204855
Core i3-2100T
BX80623I32100T
BXC80623I32100T
0.03222500 512307235
Core i3-2120T
BX80623I32120T
BXC80623I32120T
0.03222600 512307235
Core i3-3220T
BX80637I33220T
BXC80637I33220T
0.02222800 512307235
Core i3-3240T 0.02222900 512307235
Core i3-3250T 0.02223000 512307235
Core i3-2100
BX80623I32100
BXC80623I32100
0.03223100 512307265
Core i3-2105
BX80623I32105
BXC80623I32105
0.03223100 512307265
Core i3-2102
BX80623I32102
0.03223100 512307265
Core i3-3210
BX80637I33210
BXC80637I33210
0.02223200 512307255
Core i3-3220
BX80637I33220
BXC80637I33220
0.02223300 512307255
Core i3-2125
BX80623I32125
BXC80623I32125
0.03223300 512307265
Core i3-2120
BX80623I32120
BXC80623I32120
0.03223300 512307265
Core i3-3225
BX80637I33225
BXC80637I33225
0.02223300 512307255
Core i3-2130
BX80623I32130
BXC80623I32130
0.03223400 512307265
Core i3-3245
BX80637I33245
0.02223400 512307255
Core i3-3240
BX80637I33240
BXC80637I33240
0.02223400 512307255
Core i3-3250
BX80637I33250
BXC80637I33250
0.02223500 512307255
Core i5-3570T
BX80637I53570T
0.0224230033001024614445
Core i5-2500T 0.0324230033001024614445
Core i5-2400S
BX80623I52400S
BXC80623I52400S
0.0324250033001024614465
Core i5-2405S
BX80623I52405S
0.0324250033001024614465
Core i5-2390T 0.032227003500512307235
Core i5-3330S 0.0224270032001024614465
Core i5-2500S 0.0324270037001024614465
Core i5-3335S 0.0224270032001024614465
Core i5-2300
BX80623I52300
BXC80623I52300
0.0324280031001024614495
Core i5-3450S
BX80637I53450S
0.0224280035001024614465
Core i5-3340S
BX80637I53340S
0.0224280033001024614465
Core i5-3470S
BX80637I53470S
0.0224290036001024614465
Core i5-3475S 0.0224290036001024614465
Core i5-3470T 0.022229003600512307235
Core i5-2310
BX80623I52310
BXC80623I52310
0.0324290032001024614495
Core i5-3550S
BX80637I53550S
0.0224300037001024614465
Core i5-2320
BX80623I52320
BXC80623I52320
0.0324300033001024614495
Core i5-3330
BX80637I53330
BXC80637I53330
0.0224300032001024614477
Core i5-3350P
BX80637I53350P
BXC80637I53350P
0.0224310033001024614469
Core i5-3450
BX80637I53450
BXC80637I53450
0.0224310035001024614477
Core i5-2400
BX80623I52400
BXC80623I52400
0.0324310034001024614495
Core i5-3340
BX80637I53340
BXC80637I53340
0.0224310033001024614477
Core i5-3570S 0.0224310038001024614465
Core i5-2380P
BX80623I52380P
BXC80623I52380P
0.0324310034001024614495
Core i5-2450P
BX80623I52450P
0.0324320035001024614495
Core i5-3470
BX80637I53470
BXC80637I53470
0.0224320036001024614477
Core i5-2500K
BX80623I52500K
BXC80623I52500K
0.0324330037001024614495
Core i5-3550
BX80637I53550
BXC80637I53550
0.0224330037001024614477
Core i5-2500
BX80623I52500
BXC80623I52500
0.0324330037001024614495
Core i5-3570
BX80637I53570
BXC80637I53570
0.0224340038001024614477
Core i5-3570K
BX80637I53570K
BXC80637I53570K
0.0224340038001024614477
Core i5-2550K
BX80623I52550K
0.0324340038001024614495
Core i7-3770T 0.0224250037001024819245
Core i7-2600S
BX80623I72600S
0.0324280038001024819265
Core i7-3770S
BX80637I73770S
0.0224310039001024819265
Core i7-2600K
BX80623I72600K
BXC80623I72600K
0.0324340038001024819295
Core i7-2600
BX80623I72600
BXC80623I72600
0.0324340038001024819295
Core i7-3770
BX80637I73770
BXC80637I73770
0.0224340039001024819277
Core i7-3770K
BX80637I73770K
BXC80637I73770K
0.0224350039001024819277
Core i7-2700K
BX80623I72700K
BXC80623I72700K
0.0324350039001024819295
Pentium 350 0.03221200 512307215
Pentium G620T
BX80623G620T
BXC80623G620T
0.03222200 512307235
Pentium G630T
BX80623G630T
0.03222300 512307235
Pentium G640T
BX80623G640T
0.03222400 512307235
Pentium G2020T 0.02222500 512307235
Pentium G645T 0.03222500 512307235
Pentium G2100T 0.02222600 512307235
Pentium G2030T 0.02222600 512307235
Pentium G622
BX80623G622
0.03222600 512307265
Pentium G860T 0.03222600 512307235
Pentium G620
BX80623G620
BXC80623G620
0.03222600 512307265
Pentium G632 0.03222700 512307265
Pentium G2120T 0.02222700 512307235
Pentium G630
BX80623G630
BXC80623G630
0.03222700 512307265
Pentium G640
BX80623G640
BXC80623G640
0.03222800 512307265
Pentium G2010
BX80637G2010
BXC80637G2010
0.02222800 512307255
Pentium G840
BX80623G840
BXC80623G840
0.03222800 512307265
Pentium G2020
BX80637G2020
BXC80637G2020
0.02222900 512307255
Pentium G850
BX80623G850
BXC80623G850
0.03222900 512307265
Pentium G645
BX80623G645
BXC80623G645
0.03222900 512307265
Pentium G2030
BX80637G2030
BXC80637G2030
0.02223000 512307255
Pentium G860
BX80623G860
BXC80623G860
0.03223000 512307265
Pentium G2120
BX80637G2120
BXC80637G2120
0.02223100 512307255
Pentium G870
BX80623G870
0.03223100 512307265
Pentium G2130
BX80637G2130
BXC80637G2130
0.02223200 512307255
Pentium G2140
BX80637G2140
BXC80637G2140
0.02223300 512307255
Xeon E3-1220L 0.032222003400512307220
Xeon E3-1220L v2 0.022223003500512307217
Xeon E3-1260L 0.0324240033001024819245
Xeon E3-1265L v2
BX80637E31265LV2
0.0224250035001024819245
Xeon E3-1220 v2
BX80637E31220V2
0.0224310035001024819269
Xeon E3-1225
BX80623E31225
0.0324310034001024614495
Xeon E3-1220
BX80623E31220
0.0324310034001024819280
Xeon E3-1235
BX80623E31235
0.0324320036001024819295
Xeon E3-1225 v2
BX80637E31225V2
0.0224320036001024819277
Xeon E3-1230
BX80623E31230
0.0324320036001024819280
Xeon E3-1230 v2
BX80637E31230V2
0.0224330037001024819269
Xeon E3-1240
BX80623E31240
0.0324330037001024819280
Xeon E3-1245
BX80623E31245
0.0324330037001024819295
Xeon E3-1270
BX80623E31270
0.0324340038001024819280
Xeon E3-1275
BX80623E31275
0.0324340038001024819295
Xeon E3-1240 v2
BX80637E31240V2
0.0224340038001024819269
Xeon E3-1245 v2
BX80637E31245V2
0.0224340038001024819277
Xeon E3-1270 v2
BX80637E31270V2
0.0224350039001024819269
Xeon E3-1280
BX80623E31280
0.0324350039001024819295
Xeon E3-1275 v2
BX80637E31275V2
0.0224350039001024819277
Xeon E3-1290 0.0324360040001024819295
Xeon E3-1280 v2
BX80637E31280V2
0.0224360040001024819269
Xeon E3-1290 v2 0.0224370041001024819287

There are no CPUs from other manufacturers compatible with socket 1155.

Compatible sockets

There are no other sockets, compatible with the LGA1155. Particularly, the LGA1155 is not compatible with socket 1156. However, many LGA1156 heatsinks can be used with socket 1155.

Compatible package types

1155-land Flip-Chip Land Grid Array (FC-LGA) package.

Upgrading socket 1155 motherboards

To find out the fastest supported CPU for your motherboard you'll need to:

  • For brand name computers like Dell or HP: determine computer model, and search for it on the manufacturer's website. Although PC manufacturers may not publish CPU support information for their computers, you may still find processor upgrade recommendations in customer support forums.
  • If you have a generic computer, or you failed to find anything on computer manufacturer website for your brand-name computer: determine make and model of the motherboard in your computer, and search for it on the motherboard manufacturer's website. For upgrade information for ABIT, AOpen, ASRock, ASUS, Biostar, DFI, ECS, EVGA, Foxconn, Gigabyte, Intel, Jetway, MSI, PC Chips and ZOTAC motherboards please check CPU-Upgrade motherboard database.
  • If you can't find CPU support data for you computer and motherboard, then use CPU-Z or similar program to determine chipset type in your PC, and look for CPU upgrade information for the chipset. CPU support data for Intel chipsets can be found on CPU-Upgrade.com in Intel chipsets section, or on Intel website. This method is less reliable than the first two.

Once you determined which processors are compatible with your motherboard, you can choose the processor based on desired performance level and how much you want to pay for it:

  • Core i7 family offers the best performance from all desktop processors. These chips have 4 CPU cores, and can handle up to 8 different execution threads simultaneously. Due to very high clock speed and very large L3 cache, Core i7 microprocessors are still the best choice even when you run single- and dual-threaded applications. The drawback of Core i7s is their high price, about $300 and higher for new boxed CPUs.
  • Core i5 microprocessors run somewhat slower than Core i7s, but, thanks to 4 CPU cores and large cache, they are still very good upgrade choices when better than average multi-threading performance is required. Core i5s are usually priced in the $200 - $300 range.
  • Core i3 processors have only two cores, smaller size of L3 cache, and they don't support Turbo Boost technology. As a result, they perform much slower than Core i5s or i7s in multi-threaded tasks, or executing many single-threaded tasks. The i3 CPUs incorporate Hyper-Threading technology, that doubles the number of threads that can be processed at once, but this feature results in only minor performance improvements. Core i3s are priced from $120 to $150.
  • Celerons and Pentiums are budget CPUs, that have even more features disabled compared to Core i3 family. Price range of Celeron chips is from $40 to $60, and prices of Pentiums range from $60 to $100. Although Celeron and Pentium parts are very cheap, they are more than capable of running simple office and home tasks, like e-mails, documentation, web searching, etc.

Processor Installation

For processor installation instructions please check your motherboard manual, or go to this page on Intel website, or view Installation instructions for boxed processors.

Comments

Last modified: 10 Mar 2014
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