CPU List For Socket LGA 1155: Full Compatibility Guide 2025

The LGA 1155 socket, also known as Socket H2, holds a special place in the history of computing.

The LGA 1155 socket supports Intel Celeron, Pentium, Core i3/i5/i7, and Xeon CPUs. The fastest is the i7-3770K, with 4 cores and 8 threads—great for gaming and multitasking on compatible motherboards.

In this article, we’ll dive deep into the complete CPU list for socket LGA 1155, explore its compatible processors, and provide insights on their specs, use cases, and why they still matter today.

Table of Contents

What Is the LGA 1155 Socket?

Before we list the CPUs, let’s understand the socket itself. LGA 1155 is a Land Grid Array socket with 1155 pins that connect Intel processors to motherboards.

Launched alongside the Sandy Bridge microarchitecture in January 2011, it succeeded the LGA 1156 socket and was later superseded by LGA 1150 in 2013.

It supports dual-channel DDR3 memory (up to 1600 MHz officially, though higher speeds are possible), PCIe 2.0 and 3.0 interfaces, and Intel’s Direct Media Interface (DMI) 2.0.

The socket supports two microarchitectures:

Sandy Bridge (32nm): The 2nd-generation Core processors known for introducing integrated graphics and the ring bus architecture.
Ivy Bridge (22nm): The 3rd-generation Core processors, a “tick” update with improved power efficiency and better-integrated graphics.

This versatility means LGA 1155 motherboards (with a BIOS update) can run CPUs from both generations, making it a flexible platform. Now, let’s get to the heart of this guide: the CPU list.

Comprehensive CPU List for Socket LGA 1155

Below is a detailed list of processors compatible with the LGA 1155 socket, categorized by family (Core i7, i5, i3, Pentium, Celeron, and Xeon).

Note that compatibility depends on your motherboard’s chipset (e.g., H61, H67, Z68, Z77) and BIOS version. Always check your motherboard manual or manufacturer’s CPU support list.

1. Intel Core i7 Processors

The Core i7 lineup offers premium performance with quad-core designs and Hyper-Threading (8 threads), ideal for multitasking, gaming, and content creation.

Core i7-2600: 4 cores, 8 threads, 3.4 GHz base, 3.8 GHz turbo, 8MB L3 cache, 95W TDP, HD Graphics 2000.
Core i7-2600K: Unlocked, 3.4 GHz base, 3.8 GHz turbo, 95W TDP—overclockable to 4.5 GHz+ with proper cooling.
Core i7-2600S: Low-power variant, 2.8 GHz base, 3.8 GHz turbo, 65W TDP.
Core i7-2700K: 3.5 GHz base, 3.9 GHz turbo, 95W TDP—top Sandy Bridge performer.
Core i7-3770: 3.4 GHz base, 3.9 GHz turbo, 77W TDP, HD Graphics 4000 (Ivy Bridge).
Core i7-3770K: Unlocked, 3.5 GHz base, 3.9 GHz turbo, 77W TDP—best LGA 1155 CPU for enthusiasts.
Core i7-3770S: 3.1 GHz base, 3.9 GHz turbo, 65W TDP, low-power Ivy Bridge option.

2. Intel Core i5 Processors

Core i5 CPUs strike a balance between price and performance, with quad cores but no Hyper-Threading (4 threads).

Core i5-2300: 2.8 GHz base, 3.1 GHz turbo, 6MB L3 cache, 95W TDP, HD Graphics 2000.
Core i5-2400: 3.1 GHz base, 3.4 GHz turbo, 6MB cache, 95W TDP.
Core i5-2500: 3.3 GHz base, 3.7 GHz turbo, 6MB cache, 95W TDP.
Core i5-2500K: Unlocked, 3.3 GHz base, 3.7 GHz turbo, 95W TDP—great for budget overclocking.
Core i5-2550K: 3.4 GHz base, 3.8 GHz turbo, 95W TDP, no integrated graphics.
Core i5-3330: 3.0 GHz base, 3.2 GHz turbo, 6MB cache, 77W TDP, HD Graphics 2500 (Ivy Bridge).
Core i5-3450: 3.1 GHz base, 3.5 GHz turbo, 6MB cache, 77W TDP.
Core i5-3470: 3.2 GHz base, 3.6 GHz turbo, 6MB cache, 77W TDP.
Core i5-3570: 3.4 GHz base, 3.8 GHz turbo, 6MB cache, 77W TDP.
Core i5-3570K: Unlocked, 3.4 GHz base, 3.8 GHz turbo, 77W TDP—top Ivy Bridge i5.

3. Intel Core i3 Processors

Core i3 CPUs are dual-core with Hyper-Threading (4 threads), suited for basic tasks and light gaming.

Core i3-2100: 3.1 GHz base, 3MB L3 cache, 65W TDP, HD Graphics 2000.
Core i3-2120: 3.3 GHz base, 3MB cache, 65W TDP.
Core i3-2130: 3.4 GHz base, 3MB cache, 65W TDP.
Core i3-3220: 3.3 GHz base, 3MB cache, 55W TDP, HD Graphics 2500 (Ivy Bridge).
Core i3-3240: 3.4 GHz base, 3MB cache, 55W TDP, HD Graphics 2500.

4. Intel Pentium Processors

Pentium CPUs are budget dual-core options without Hyper-Threading, perfect for office PCs.

Pentium G620: 2.6 GHz base, 3MB cache, 65W TDP, HD Graphics.
Pentium G630: 2.7 GHz base, 3MB cache, 65W TDP.
Pentium G850: 2.9 GHz base, 3MB cache, 65W TDP.
Pentium G2020: 2.9 GHz base, 3MB cache, 55W TDP, HD Graphics (Ivy Bridge).
Pentium G2120: 3.1 GHz base, 3MB cache, 55W TDP.

5. Intel Celeron Processors

Celeron CPUs are entry-level, dual-core chips for minimal computing needs.

Celeron G530: 2.4 GHz base, 2MB cache, 65W TDP, HD Graphics.
Celeron G540: 2.5 GHz base, 2MB cache, 65W TDP.
Celeron G1610: 2.6 GHz base, 2MB cache, 55W TDP, HD Graphics (Ivy Bridge).
Celeron G1620: 2.7 GHz base, 2MB cache, 55W TDP.

6. Intel Xeon Processors

Xeon CPUs, designed for workstations and servers, also work with LGA 1155 motherboards supporting them.

Xeon E3-1220: 4 cores, 4 threads, 3.1 GHz base, 3.4 GHz turbo, 8MB cache, 80W TDP.
Xeon E3-1230: 4 cores, 8 threads, 3.2 GHz base, 3.6 GHz turbo, 8MB cache, 80W TDP.
Xeon E3-1240: 4 cores, 8 threads, 3.3 GHz base, 3.7 GHz turbo, 8MB cache, 80W TDP.
Xeon E3-1270: 4 cores, 8 threads, 3.4 GHz base, 3.8 GHz turbo, 8MB cache, 80W TDP.
Xeon E3-1230 v2: 4 cores, 8 threads, 3.3 GHz base, 3.7 GHz turbo, 8MB cache, 69W TDP (Ivy Bridge).
Xeon E3-1270 v2: 4 cores, 8 threads, 3.5 GHz base, 3.9 GHz turbo, 8MB cache, 69W TDP.

Key Features of LGA 1155 CPUs

1. Sandy Bridge vs. Ivy Bridge

Sandy Bridge (32nm): Launched in 2011, it introduced integrated graphics (HD 2000/3000) and Turbo Boost for dynamic overclocking. It’s less efficient than Ivy Bridge but still capable.
Ivy Bridge (22nm): Released in 2012, it’s a refinement with a smaller die size, lower power consumption (e.g., 77W vs. 95W TDP in many cases), and upgraded graphics (HD 2500/4000). It also supports PCIe 3.0 with compatible chipsets.

2. Overclocking Potential

CPUs with a “K” suffix (e.g., i7-3770K, i5-3570K) are unlocked for overclocking. With a Z68 or Z77 motherboard and good cooling, these chips can hit 4.5 GHz or higher, extending their lifespan for modern tasks.

3. Integrated Graphics

Most LGA 1155 CPUs include Intel HD Graphics, eliminating the need for a discrete GPU in introductory systems. Ivy Bridge’s HD 4000 offers a noticeable boost over Sandy Bridge’s HD 3000, supporting light gaming and video playback.

Best LGA 1155 CPUs in 2025

Even in 2025, some LGA 1155 CPUs remain viable for specific use cases. Here are the top picks:

1. Intel Core i7-3770K

Why: The king of LGA 1155—4 cores, 8 threads, 3.5 GHz base (3.9 GHz turbo), and overclockable. It’s still decent for 1080p gaming and productivity.
Use Case: Gaming rigs, video editing, or overclocking enthusiasts.
Price: Around $80–$120 used.

2. Intel Core i5-3570K

Why: Affordable quad-core with 3.4 GHz base (3.8 GHz turbo) and overclocking support. It pairs well with mid-range GPUs like the GTX 1660.
Use Case: Budget gaming or general-purpose PCs.
Price: $40–$70 used.

3. Xeon E3-1270 v2

Why: Ivy Bridge server-grade CPU with 4 cores, 8 threads, and a 3.5 GHz base (3.9 GHz turbo). There is no overclocking, but excellent value.
Use Case: Workstations, small servers, or multitasking.
Price: $50–$90 used.

4. Core i3-3240

Why: Dual-core with Hyper-Threading, 3.4 GHz, and low 55W TDP. Solid for basic tasks.
Use Case: Office PCs, HTPCs, or budget builds.
Price: $15–$30 used.

LGA 1155 Supported Processor Generation

The LGA 1155 socket works with two cool Intel generations: Sandy Bridge (2nd Gen) from 2011 and Ivy Bridge (3rd Gen) from 2012. They’re older but still great for budget builds or upgrading old PCs with the correct motherboard.

CPU List for Socket LGA 1155 Motherboard

Got an LGA 1155 motherboard? It supports many CPUs like Core i7-3770, i5-3570, i3-2120, Pentium G620, and even Xeons like E3-1270. Check your motherboard’s list, but these chips can power your system nicely.

LGA 1155 CPU List for Gaming

Looking to game with LGA 1155? The Core i7-3770K, i5-3570K, and Xeon E3-1270 v2 are top picks. They’ve got solid cores and speed for older games or light 1080p gaming—perfect if you pair them with a decent GPU.

CPU List for Socket LGA 1155 for Gaming

For gaming on an LGA 1155 socket, grab a Core i7-3770K or i5-3570K—they’re fast and overclockable. The i3-3240 works for lighter stuff, too. These CPUs still handle casual gaming in 2025 with a good graphics card.

LGA 1155 Processor i7

The LGA 1155 i7 CPUs are fantastic—like the i7-3770K with 4 cores, 8 threads, and 3.5 GHz speed. There’s also the i7-2600K for Sandy Bridge fans. They’re powerful for work or play if you’ve got this socket.

LGA 1151 CPU list

For LGA 1155, you’ve got CPUs like i7-3770K, i5-3470, i3-3220, Pentium G2120, and Xeon E3-1230 v2. They range from budget to high-end, so whether it’s gaming or basic tasks, there’s something for your old rig here.

FAQs

1. Which CPU Supports LGA 1155?

LGA 1155 works with CPUs like Core i7-3770, i5-3570, i3-2120, and even Xeons—check your motherboard first!

2. What Is the Best CPU for LGA 1155?

For LGA 1155, the Core i7-3770K rocks—fast, overclockable, and great for gaming or working on a budget.

3. What Is the Fastest LGA 1155 CPU?

The Core i7-3770K is the speed king for LGA 1155—3.5 GHz base, turbo to 3.9 GHz, and overclockable!

4. Is LGA 1155 Outdated?

Yeah, LGA 1155 is old-school by 2025—still fine for basic stuff, but newer sockets like LGA 1700 are better.

5. What Does LGA 1155 Support?

LGA 1155 supports Sandy Bridge and Ivy Bridge CPUs, DDR3 RAM, and older graphics—perfect for budget or retro builds.

6. What CPU Gen Does Windows 11 Support?

Windows 11 needs 8th-Gen Intel or newer, so LGA 1155’s 2nd and 3rd-Gen CPUs won’t officially work.

7. Is i7 3770 LGA 1155?

The i7-3770 fits LGA 1155 perfectly—4 cores, 8 threads, and solid power for an older socket.

8. Will 1150 CPU Fit 1155?

LGA 1150 CPUs won’t fit LGA 1155—the pin layouts are different, so they’re not interchangeable.

Conclusion

The LGA 1155 socket, supporting Sandy Bridge and Ivy Bridge CPUs like the speedy i7-3770K, remains a solid choice for budget builds in 2025. From Celeron to Xeon, it offers versatile options for gaming, work, or retro PCs. Though outdated for cutting-edge tasks, its affordability and compatibility keep it alive—perfect for upgrading old rigs on a dime!