End-of-lifeCore i7 (Lynnfield)

Intel · Core i7

Core i7-870

The top-tier Lynnfield CPU before the K-series era.

High-End GamingContent CreationHeavy Multitasking2009 Enthusiast Builds

Cores / Threads

4/ 8

Base / Boost

2.933/ 3.6 GHz

PCIe Lanes

16

L3 Cache

8MB

TDP

95W

Socket

Intel Socket 1156

Verdict

8/ 10

80

Quick Verdict

A powerful and expensive Lynnfield chip that delivered top-tier performance in 2009, though completely obsolete today.

Best for:High-End GamingContent CreationHeavy Multitasking2009 Enthusiast Builds

Overview

Launch

Sep 8th, 2009

Status

End-of-life

Generation

Core i7 (Lynnfield)

Market

Desktop

About this CPU

The Intel Core i7-870 is a high-end desktop processor launched in September 2009, based on the 45nm Lynnfield architecture. Operating at a base frequency of 2.933 GHz and boosting up to 3.6 GHz via Turbo Boost, it was the fastest Lynnfield chip at launch. It features 4 cores and 8 threads, supported by an 8 MB L3 cache. Utilizing the LGA 1156 socket, it brought the Nehalem microarchitecture to a more accessible platform than LGA 1366. It integrates a dual-channel DDR3 memory controller and 16 PCIe 2.0 lanes directly on the CPU. Like other Lynnfield chips, it lacks an integrated GPU. With a 95W TDP, it was relatively manageable to cool. The i7-870 was the premium choice for gamers and enthusiasts in 2009, offering excellent multi-threaded performance. It was eventually overshadowed by the unlocked i7-875K, but it remains a solid representative of the early Core i7 desktop era, though obsolete today.

The i7-870 was the flagship of the Lynnfield lineup. With 4 cores, 8 threads, and a 3.6 GHz turbo, it offered excellent performance for gaming and content creation.

Its 95W TDP made it efficient enough for standard cooling, and it dominated the high-end mainstream market in 2009.

Specifications

ArchitectureLynnfield
Manufacturing Process45nm
Cores / Threads4 / 8
Base Clock2.933 GHz
Boost Clock3.6 GHz
L3 Cache8 MB
TDP95 W
Memory TypeDDR3
Memory Speed1333 MT/s
Memory ChannelsDual-Channel (2)
PCIe Version / LanesGen 2 × 16
Integrated GraphicsNone
Dual-Channel16 PCIe Lanes
Target Audience
GamersStreamersContent CreatorsDevelopersWorkstation UsersOffice UsersStudents

Performance

Productivity
38Limited

Fastest Lynnfield at launch, but obsolete now.

Virtualization
42Limited

Good for legacy VMs.

Gaming
37Limited

Handles old games well but bottlenecks modern titles.

Efficiency
45Limited

95W TDP is acceptable for 45nm.

GamingLegacy
  • PCIe 2.0 only
  • No AVX support
  • Requires discrete GPU
CreatorLegacy
Legacy PremierePhotoshop3D Modeling
AI / MLNone
  • No AI hardware
  • Unsuitable for modern inference
Industry Impact
Gaming
High
Workstations
Moderate
Content Creation
High
Virtualization
Moderate

Architecture

45nm

Process Node

Lynnfield

Codename

4C / 8T

Core Config

8 MB

L3 Cache

95 W

TDP

Architecture Overview

The Core i7-870 is based on the Lynnfield die, a mainstream variant of the Nehalem architecture. It integrates a dual-channel DDR3 memory controller and 16 PCIe 2.0 lanes directly onto the CPU. Manufactured on a 45nm process, it houses 774 million transistors on a 296 mm² die. The architecture employs Hyper-Threading, allowing 4 physical cores to process 8 threads simultaneously. Turbo Boost dynamically increases the clock from 2.933 GHz to 3.6 GHz based on demand and thermal headroom. The 870 was the highest bin of Lynnfield silicon at launch, requiring premium binning to achieve its 3.6 GHz turbo. It lacks an integrated GPU, relying on discrete graphics. The locked multiplier limits overclocking to Base Clock (BCLK) adjustments, though it could still reach 3.8-4.0 GHz with good cooling. It communicates with the P55 chipset via DMI, providing sufficient bandwidth for mainstream desktop workloads.

CPU Design

4 cores, 8 threads, 45nm process, 774M transistors.

Memory Subsystem

Dual-channel DDR3-1333 integrated controller.

PCIe & I/O

16 PCIe 2.0 lanes for discrete graphics.

Overclocking

Locked multiplier, limited BCLK tuning.

Generation Comparison
Core 2 Quad Q9650Core i7-870Core i7-2600
  • Integrated memory controller
  • Hyper-Threading
  • Turbo Boost
  • Higher IPC

Key Highlights

High Base Clock
2.933 GHz base clock is high for a 45nm quad-core.
3.6 GHz Turbo
Aggressive turbo boost for single-core workloads.
8MB L3 Cache
Large shared cache for improved performance.
Strengths
  • High base and turbo clocks
  • 8MB L3 cache
  • Quad-core with HT
  • Good 2009 performance
Weaknesses
  • Obsolete platform
  • No integrated graphics
  • Locked multiplier
  • Expensive at launch

History

Launch Date
Sep 8th, 2009
Status
End-of-life
Generation
Core i7 (Lynnfield)
Market
Desktop
The Story

The Core i7-870 launched in September 2009 as the flagship of the Lynnfield lineup. It offered the highest clock speeds of the initial LGA 1156 CPUs, with a 2.933 GHz base and 3.

6 GHz turbo. It was the premium choice for gamers and power users who didn't want to spend the premium on the LGA 1366 platform. The 870 delivered excellent performance, easily handling the games and applications of its era.

However, it was overshadowed less than a year later by the i7-875K, which offered an unlocked multiplier for a similar price. The 870 remained a popular high-end option until the Sandy Bridge release in 2011. Today, it is remembered as a fast but expensive chip that marked the peak of the initial Lynnfield rollout before Intel shifted focus to unlocked K-series processors.

Improvements over Previous Generation

  • Integrated memory controller
  • Hyper-Threading
  • Turbo Boost
  • Higher IPC

Alternatives & Competitors

Intel Core i7-860
Cheaper, similar performance in most tasks.
Intel Core i7-875K
Unlocked alternative for overclocking.
Intel Core i7-920
LGA 1366 alternative with triple-channel memory.
AMD Phenom II X4 965
AMD's flagship quad-core.
Intel Core i7-2600
The direct Sandy Bridge successor.
Direct Competitors
AMD Phenom II X4 965Intel Core i5-750Intel Core i7-920AMD Phenom II X6 1055TIntel Core 2 Quad Q9650

Should You Buy It?

Not Recommended for the right buyer

Maintaining a legacy retro gaming rig.

Avoid if…

  • Building new
  • Need modern efficiency
  • Wanting upgrade paths

Use Cases

High-End Gaming
Excellent (for 2009)
Video Editing
Very Good
3D Rendering
Good
Streaming
Moderate

Interesting Facts

It was the fastest LGA 1156 CPU until the i7-875K and i7-880 arrived.

The i7-870 could often overclock to 4.0GHz via BCLK.

It was popular in high-end pre-built gaming PCs.

Lacked the triple-channel memory of the i7-950.

People Also Ask

Can you overclock the i7-870?

Yes, but only via Base Clock (BCLK) since the multiplier is locked.

Does the i7-870 have integrated graphics?

No, it requires a discrete GPU.

What is the TDP of the i7-870?

The TDP is 95W.

When was the i7-870 released?

It was released on September 8th, 2009.

How many cores does the i7-870 have?

It has 4 cores and 8 threads.

What socket does the i7-870 use?

It uses Intel Socket 1156.

What memory does the i7-870 support?

It supports dual-channel DDR3-1333.

Is the i7-870 good for modern gaming?

No, it lacks AVX and bottlenecks modern GPUs.

What is the max turbo frequency of the i7-870?

The max turbo is 3.6 GHz.

Does the i7-870 support Hyper-Threading?

Yes, it supports 8 threads.

Frequently Asked Questions

What is the L3 cache size of the i7-870?

It has 8 MB of shared L3 cache.

What manufacturing process is used for the i7-870?

It is built on a 45nm process.

Does the i7-870 support Virtualization?

Yes, it supports VT-x.

What is the base clock speed of the i7-870?

The base clock is 2.933 GHz.

What chipsets are compatible with the i7-870?

P55, H55, H57, and Q57 chipsets.

Can I use DDR4 with the i7-870?

No, it only supports DDR3.

Does the i7-870 have PCIe 3.0?

No, it supports PCIe 2.0.

Is the i7-870 unlocked?

No, the multiplier is locked.

Is the i7-870 still manufactured?

No, it is End-of-life.

Does it support NVMe SSDs?

Not natively, requires a PCIe adapter.