Socket LGA 1155 – CPU list, Xeon, specs and recommendations

The LGA 1155 socket is a CPU socket designed by Intel Corporation for their second-generation Core i3, i5, and i7 processors based on the Sandy Bridge microarchitecture. The socket supports dual-channel DDR3 memory and is used on motherboards based on the Intel 6-series chipset. Later, it was also used with third-generation Core processors based on the Ivy Bridge microarchitecture. In this article, we will explore the features and differences between these two microarchitectures and their impact on performance. In this article, we will explore the features and differences between these two microarchitectures, list the processors compatible with the LGA 1155 socket, and recommend the best choice for upgrading or replacing.

Architectures and features of LGA 1155

Socket LGA 1155 for CPU Intel — Socket LGA 1155 on a motherboard

Socket was a popular choice for users looking to build a system based on the Sandy Bridge or Ivy Bridge microarchitecture. SandyB was the first to introduce the Ring Bus system architecture and integrated graphics, while Ivy Bridge improved performance and power efficiency with a refined architecture and a new graphics architecture.

Sandy Bridge

SandyBridge was released in 2011 and was the successor to the Nehalem microarchitecture. It was the first to feature Intel’s new “Ring Bus” system architecture, which improved performance by allowing the processor cores to communicate with each other more efficiently. It also introduced Intel’s Advanced Vector Extensions (AVX) instruction set, which improved performance for floating-point intensive applications.

Microarchitecture featured Intel’s 32-nanometer process technology and integrated graphics on the processor die, which was a significant improvement over previous generations. It also introduced the Turbo Boost feature, which allowed the processor to dynamically increase its clock speed when additional performance was required.

Ivy Bridge

Ivy Bridge was released in 2012 and was the successor to the Sandy Bridge microarchitecture. It was based on the same 22-nanometer process technology as the previous generation, but featured a refined architecture that improved performance and power efficiency. It also introduced Intel’s Tri-Gate transistor technology, which allowed for better control of the flow of electricity within the processor.

One of the significant improvements in Ivy Bridge was the integrated graphics, which had twice the performance of the Sandy Bridge graphics. It also featured a new instruction set called Intel Advanced Encryption Standard New Instructions (AES-NI), which improved performance for encryption and decryption tasks. Ivy Bridge also introduced support for PCI Express 3.0, which doubled the bandwidth of the previous generation.

Differences between Sandy Bridge and Ivy Bridge

The most significant difference between Sandy Bridge and Ivy Bridge is the manufacturing process. Ivy Bridge uses a 22-nanometer process technology, which allows for more transistors to be packed into a smaller space, improving performance and power efficiency. It also introduces support for PCI Express 3.0, which offers twice the bandwidth of PCI Express 2.0.

Ivy Bridge also introduces a new graphics architecture, which offers better performance and efficiency than the Sandy Bridge graphics. Additionally, Ivy Bridge features new instruction sets, such as AVX2 and FMA3, which offer improved performance for mathematical and scientific applications.

Full list of processors for LGA 1155 socket and specs

How to determine Sandy Bridge or Ivy Bridge?

For Core series models, you can determine the architecture by the model number:

Sandy Bridge – the number starts with 2: Core i3 2100, Core i5 2300, etc.

Ivy Bridge – the number starts with 3: Core i3 3210, Core i5 3330, etc.

Below is a table with the main characteristics of all existing processors for the 1155 socket (excluding server Xeons, for which we have created a separate table below).

CPU Name	Frequency	Core	Threads	Cache memory	Process	TDP	Graphics	Launch Date
Intel Core i7-3770K	3.50 GHz	4	8	8 MB	22nm	77W	Intel HD Graphics 4000	2012
Intel Core i3-3250	3.50 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 2500	2013
Intel Core i3-2130	3.40 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 2000	2011
Intel Core i5-3570K	3.40 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 4000	2012
Intel Core i3-3240	3.40 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 2500	2012
Intel Core i5-3570	3.40 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2012
Intel Core i7-3770	3.40 GHz	4	8	8 MB	22nm	77W	Intel HD Graphics 4000	2012
Intel Core i3-3245	3.40 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 4000	2013
Intel Core i3-2120	3.30 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 2000	2011
Intel Core i3-2125	3.30 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 3000	2011
Intel Core i5-3550	3.30 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2012
Intel Core i3-3225	3.30 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 4000	2012
Intel Core i3-3220	3.30 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 2500	2012
Intel Pentium G2140	3.30 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Core i5-3470	3.20 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2012
Intel Pentium G2130	3.20 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Core i3-3210	3.20 GHz	2	4	3 MB	22nm	55W	Intel HD Graphics 2500	2013
Intel Core i3-2100	3.10 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 2000	2011
Intel Core i3-2102	3.10 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 2000	2011
Intel Pentium G870	3.10 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2012
Intel Core i3-2105	3.10 GHz	2	4	3 MB	32nm	65W	Intel HD Graphics 3000	2011
Intel Core i5-3450	3.10 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2012
Intel Core i7-3770S	3.10 GHz	4	8	8 MB	22nm	65W	Intel HD Graphics 4000	2012
Intel Pentium G2120	3.10 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2012
Intel Core i5-3570S	3.10 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2012
Intel Core i5-3350P	3.10 GHz	4	4	6 MB	22nm	69W		2012
Intel Core i5-3340	3.10 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2013
Intel Pentium G860	3.00 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Core i5-3330	3.00 GHz	4	4	6 MB	22nm	77W	Intel HD Graphics 2500	2012
Intel Core i5-3550S	3.00 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2012
Intel Core i3-3250T	3.00 GHz	2	4	3 MB	22nm	35W	Intel HD Graphics 2500	2013
Intel Pentium G2030	3.00 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Pentium G850	2.90 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Core i5-3475S	2.90 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 4000	2012
Intel Core i5-3470T	2.90 GHz	2	4	3 MB	22nm	35W	Intel HD Graphics 2500	2012
Intel Core i3-3240T	2.90 GHz	2	4	3 MB	22nm	35W	Intel HD Graphics 2500	2012
Intel Core i5-3470S	2.90 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2012
Intel Pentium G645	2.90 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2012
Intel Pentium G2020	2.90 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Pentium G640	2.80 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2012
Intel Pentium G840	2.80 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Core i5-3450S	2.80 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2012
Intel Core i3-3220T	2.80 GHz	2	4	3 MB	22nm	35W	Intel HD Graphics 2500	2012
Intel Pentium G2010	2.80 GHz	2	2	3 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Core i5-3340S	2.80 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2013
Intel Celeron G1630	2.80 GHz	2	2	2 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Core i5-2390T	2.70 GHz	2	4	3 MB	32nm	35W	Intel HD Graphics 2000	2011
Intel Pentium G630	2.70 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Pentium G632	2.70 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Core i5-3330S	2.70 GHz	4	4	6 MB	22nm	65W	Intel HD Graphics 2500	2012
Intel Celeron G555	2.70 GHz	2	2	2 MB	32nm	65W	Intel HD Graphics 2nd	2012
Intel Celeron G1620	2.70 GHz	2	2	2 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Pentium G2120T	2.70 GHz	2	2	3 MB	22nm	35W	Intel HD Graphics 2rd	2013
Intel Celeron G550	2.60 GHz	2	2	2 MB	32nm	65W	Intel HD Graphics 2nd	2012
Intel Core i3-2120T	2.60 GHz	2	4	3 MB	32nm	35W	Intel HD Graphics 2000	2011
Intel Pentium G620	2.60 GHz	2	2	3 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Pentium G2100T	2.60 GHz	2	2	3 MB	22nm	35W	Intel HD Graphics 3rd	2012
Intel Pentium G860T	2.60 GHz	2	2	3 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Celeron G1610	2.60 GHz	2	2	2 MB	22nm	55W	Intel HD Graphics 2rd	2013
Intel Pentium G2030T	2.60 GHz	2	2	3 MB	22nm	35W	Intel HD Graphics 2rd	2013
Intel Celeron G540	2.50 GHz	2	2	2 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Core i3-2100T	2.50 GHz	2	4	3 MB	32nm	35W	Intel HD Graphics 2000	2011
Intel Core i5-2405S	2.50 GHz	4	4	6 MB	32nm	65W	Intel HD Graphics 3000	2011
Intel Core i7-3770T	2.50 GHz	4	8	8 MB	22nm	45W	Intel HD Graphics 4000	2012
Intel Pentium G645T	2.50 GHz	2	2	3 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Pentium G2020T	2.50 GHz	2	2	3 MB	22nm	35W	Intel HD Graphics 2rd	2013
Intel Celeron G530	2.40 GHz	2	2	2 MB	32nm	65W	Intel HD Graphics 2nd	2011
Intel Pentium G640T	2.40 GHz	2	2	3 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Celeron G1620T	2.40 GHz	2	2	2 MB	22nm	35W	Intel HD Graphics 2rd	2013
Intel Pentium G630T	2.30 GHz	2	2	3 MB	32nm	35W	Intel HD Graphics 2nd	2011
Intel Core i5-3570T	2.30 GHz	4	4	6 MB	22nm	45W	Intel HD Graphics 2500	2012
Intel Celeron G1610T	2.30 GHz	2	2	2 MB	22nm	35W	Intel HD Graphics 2rd	2013
Intel Celeron G550T	2.20 GHz	2	2	2 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Pentium G620T	2.20 GHz	2	2	3 MB	32nm	35W	Intel HD Graphics 2nd	2011
Intel Celeron G540T	2.10 GHz	2	2	2 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Celeron G530T	2.00 GHz	2	2	2 MB	32nm	35W	Intel HD Graphics 2nd	2011
Intel Celeron G470	2.00 GHz	1	2	1.5 MB	32nm	35W	Intel HD Graphics 2nd	2013
Intel Celeron G465	1.90 GHz	1	2	1.5 MB	32nm	35W	Intel HD Graphics 2nd	2012
Intel Celeron G460	1.80 GHz	1	2	1.5 MB	32nm	35W	Intel HD Graphics 2nd	2011
Intel Celeron G440	1.60 GHz	1	1	1 MB	32nm	35W	Intel HD Graphics 2nd	2011

List Xeon processors supporting LGA 1155

Processor Model	Cores / Threads	Max Frequency	Cache	TDP	Process	PCI Express
Intel Xeon E3-1281 v3	4 / 8	4.10 GHz	8 MB	82W	22 nm	3.0
Intel Xeon E3-1286 v3	4 / 8	4.10 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1280 v3	4 / 8	4.00 GHz	8 MB	82W	22 nm	3.0
Intel Xeon E3-1285 v3	4 / 8	4.00 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1271 v3	4 / 8	4.00 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1286L v3	4 / 8	4.00 GHz	8 MB	65W	22 nm	3.0
Intel Xeon E3-1276 v3	4 / 8	4.00 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1270 v3	4 / 8	3.90 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1275 v3	4 / 8	3.90 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1285L v3	4 / 8	3.90 GHz	8 MB	65W	22 nm	3.0
Intel Xeon E3-1275L v3	4 / 8	3.90 GHz	8 MB	45W	22 nm	3.0
Intel Xeon E3-1241 v3	4 / 8	3.90 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1246 v3	4 / 8	3.90 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1240 v3	4 / 8	3.80 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1245 v3	4 / 8	3.80 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1231 v3	4 / 8	3.80 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1285L v4	4 / 8	3.80 GHz	6 MB	65W	14 nm	3.0
Intel Xeon E3-1285 v4	4 / 8	3.80 GHz	6 MB	95W	14 nm	3.0
Intel Xeon E3-1230 v3	4 / 8	3.70 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1265L v3	4 / 8	3.70 GHz	8 MB	45W	22 nm	3.0
Intel Xeon E3-1226 v3	4 / 4	3.70 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1225 v3	4 / 4	3.60 GHz	8 MB	84W	22 nm	3.0
Intel Xeon E3-1220 v3	4 / 4	3.50 GHz	8 MB	80W	22 nm	3.0
Intel Xeon E3-1265L v4	4 / 8	3.30 GHz	6 MB	35W	14 nm	3.0
Intel Xeon E3-1240L v3	4 / 8	3.00 GHz	8 MB	25W	22 nm	3.0
Intel Xeon E3-1230L v3	4 / 8	2.80 GHz	8 MB	25W	22 nm	3.0
Intel Xeon E3-1220L v3	2 / 4	1.50 GHz	4 MB	13W	22 nm	3.0

Which processors are the best to choose for LGA 1155 socket?

The most powerful processors that support LGA 1155 socket are Core i7 3770K and Core i7 2700K. Their approximate cost is $100 and above. There is also a good processor, the i5 2500K (about $60-80), but it only has 4 threads. If you are currently reading this article, you are probably looking to upgrade or restore your computer on a tight budget, in which case you can go for the Core i7 2600K (around $40) or the Xeon E3 1230v2, Xeon 1240v2, and Xeon 1270 v2 (these Xeons do not support overclocking, but can compete with Core i7 3770). If you have a motherboard that supports overclocking, then you can consider the Xeon E3 1230, 1240, and 1270. Xeon processors can be purchased from $10 and up.

For example, here is the cost on Amazon – Xeon E3 127.

Below is a table with specifications and examples of regular LGA 1155 processors:

Processor Model	Cores/Threads	Clock Speed	Turbo Boost	L3 Cache	Process	Graphics	Price (USD)
Core i7 2700K	4/8	3.5 GHz	3.9 GHz	8 MB	32 nm	HD 3000	~100 Check price
Core i7 3770K	4/8	3.5 GHz	3.9 GHz	8 MB	22 nm	HD 4000	~120 Check price
Core i7 2600K	4/8	3.4 GHz	3.8 GHz	8 MB	32 nm	HD 3000	~40-150 Check price
Core i5 2500K	4/4	3.3 GHz	3.7 GHz	6 MB	32 nm	HD 3000	~60-80 Check price

Here’s the table with the characteristics of Xeon E3 1230, 1240, and 1270, as well as Xeon E3 1230v2, 1240v2, and 1270v2 processors:

Processor Model	Cores/Threads	Clock Speed	Turbo Boost	L3 Cache	Process	Graphics	Price (USD)
Xeon E3 1230	4/8	3.2 GHz	3.6 GHz	8 MB	32 nm	Intel HD 3000	~10-40 Check price
Xeon E3 1240	4/8	3.3 GHz	3.7 GHz	8 MB	32 nm	Intel HD 3000	~10-40 Check price
Xeon E3 1270	4/8	3.4 GHz	3.8 GHz	8 MB	32 nm	Intel HD 3000	~10-40 Check price
Xeon E3 1230v2	4/8	3.3 GHz	3.7 GHz	8 MB	22 nm	Intel HD 4000	~60-80 Check price
Xeon E3 1240v2	4/8	3.4 GHz	3.8 GHz	8 MB	22 nm	Intel HD 4000	~80-100 Check price
Xeon E3 1270v2	4/8	3.5 GHz	3.9 GHz	8 MB	22 nm	Intel HD P4000	~120-150 Check price

*We cannot provide exact links to the products as the processors are outdated and limited in stock, but we have provided the average fair prices.

Previous socket	Next socket
LGA 1156 CPU list	LGA 2011 CPU list

Denis B.

Author and developer of the website

For many years, I have been following the PC and component market, building computers, and constantly improving my expertise in this field. With my website, I aim to share my knowledge and provide helpful guides and advice for those interested in building and upgrading their own computers.