CPU Comparison

Core i7-870 vs Intel Core i5-750

A side-by-side comparison of specs, performance and value. 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.

Top pick
Intel · Core i7
Core i7-870
4C / 8T3.6 GHz95 W
8
Full review
Intel · Core i5
Intel Core i5-750
4C / 4T3.2 GHz95 W
5
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
Desktop
Segment
Desktop High-End
Desktop
Generation
Core i7 (Lynnfield)
1st Gen (Nehalem derivative)
Launched
2009
2009
Status
End-of-life
Discontinued
Codename
Lynnfield
Lynnfield
Series
Core i7
Core i5
Family
1st Gen Core i7
Lynnfield
Predecessor
Core 2 Quad Q9650
Intel Core 2 Quad Q9400
Successor
Core i7-2600
Intel Core i5-760

Specifications Compared

Cores & Clocks
Cores
4
4
Threads
8
4
Base Clock
2.933 GHz
2.666 GHz
Boost Clock
3.6 GHz
3.2 GHz
Cache & Power
L3 Cache
8 MB
8 MB
TDP
95 W
95 W
Architecture
Architecture
Lynnfield
Lynnfield
Process Node
45nm
45nm
Memory
Memory Type
DDR3
DDR3
Memory Speed
1333 MT/s
DDR3-1333
Memory Channels
Dual (2)
Dual (2)
Max Memory
16 GB
Platform & I/O
Socket
Intel Socket 1156
LGA 1156
PCIe Version
Gen 2
PCIe 2.0
PCIe Lanes
16
16
Integrated GPU
None
None
Unlocked
No
No

Performance Compared

Productivity

Core i7-870Best38

Fastest Lynnfield at launch, but obsolete now.

Intel Core i5-75025

Four cores help with basic multitasking but modern productivity apps will feel sluggish.

Gaming

Core i7-870Best37

Handles old games well but bottlenecks modern titles.

Intel Core i5-75012

With a discrete GPU, can handle older games but cannot run modern titles at acceptable frame rates due to CPU limitations.

Virtualization

Core i7-870Best42

Good for legacy VMs.

Intel Core i5-75020

Four real cores provide usable virtualization for lightweight VMs.

Efficiency

Core i7-870Best45

95W TDP is acceptable for 45nm.

Intel Core i5-75025

95W for four 45nm cores is inefficient by modern standards.

Specialized Performance

AI / ML

Core i7-870None
  • No AI hardware
  • Unsuitable for modern inference
Intel Core i5-750None
  • No AI acceleration instructions
  • Far too slow for any ML workload

Content Creation

Core i7-870Legacy
Legacy PremierePhotoshop3D Modeling
Intel Core i5-750Very Poor

Gaming

Core i7-870Legacy
  • PCIe 2.0 only
  • No AVX support
  • Requires discrete GPU
Intel Core i5-750Very Poor (Modern)
  • Cannot run modern AAA games at playable frame rates
  • With a capable discrete GPU, older titles (pre-2015) run adequately
  • The 2.666GHz base clock is a significant bottleneck

Industry Impact

Gaming
High
High
Workstations
Moderate
Moderate
Content Creation
High
Moderate
Virtualization
Moderate
Moderate

Best CPU by Use Case

High-End Gaming
Excellent (for 2009)
Video Editing
Very Good
3D Rendering
Good
Streaming
Moderate
Gaming (legacy)
Good for 2009-2012 era games with a discrete GPU
Multi-Tasking
Four cores handle basic multitasking adequately
Office Productivity
Functional for basic documents and spreadsheets
Modern Gaming
Unusable without a discrete GPU; limited even with one
Content Creation
Too slow for modern creative applications

Target Audience

Gamers
Targeted
Targeted
Content Creators
Targeted
Developers
Targeted
Workstation Users
Streamers
Targeted
Office / Productivity
Targeted
Students
Targeted

Strengths & Weaknesses

Core i7-870

Pros

  • High base and turbo clocks
  • 8MB L3 cache
  • Quad-core with HT
  • Good 2009 performance

Cons

  • Obsolete platform
  • No integrated graphics
  • Locked multiplier
  • Expensive at launch
Intel Core i5-750

Pros

  • Four real cores provided strong 2009-era performance
  • 8MB L3 cache was generous for the price
  • Turbo boost significantly improved single-threaded performance
  • Excellent value that redefined mainstream desktop pricing
  • Overclockable via BCLK with good headroom

Cons

  • No Hyper-Threading limits multi-threaded vs i7 Lynnfield
  • No integrated graphics requires a discrete GPU
  • 45nm process is obsolete
  • No AVX instruction support
  • LGA 1156 platform is dead with no upgrade path

Competitors & Alternatives

Core i7-870

  • AMD Phenom II X4 965

    Desktop High-End

    Rival
  • Intel Core i5-750

    Desktop Mainstream

    Rival
    Compare head-to-head
  • Intel Core i7-920

    Desktop High-End

    Rival
    Compare head-to-head
  • AMD Phenom II X6 1055T

    Desktop High-End

    Rival
  • Intel Core 2 Quad Q9650

    Legacy High-End

    Rival
  • Intel Core i7-860
    Alt

    Cheaper, similar performance in most tasks.

  • Intel Core i7-875K
    Alt

    Unlocked alternative for overclocking.

  • Intel Core i7-2600
    Alt

    The direct Sandy Bridge successor.

Intel Core i5-750

  • AMD Phenom II X4 965

    Quad-Core Desktop

    Rival
  • AMD Phenom II X4 955

    Quad-Core Desktop

    Rival
  • Intel Core i7-920

    High-End Desktop

    Rival
    Compare head-to-head
  • AMD Phenom II X6 1055T

    Six-Core Desktop

    Rival
  • Intel Core 2 Quad Q9650

    Legacy Quad-Core

    Rival
  • Intel Core i7-860
    Alt

    Eight threads via Hyper-Threading for better multi-threaded performance.

  • Higher clock speed on the same platform for a small premium.

    Compare head-to-head

Our Verdict on Each

Core i7-870Situational

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

Best for: Maintaining a legacy retro gaming rig.

Read the full review

A landmark processor that offered excellent quad-core value in 2009-2010. Completely obsolete today but historically significant as the processor that established the Core i5 brand.

Best for: Keeping an existing LGA 1156 Lynnfield system functional for light tasks

Read the full review

Frequently Asked Questions

Which is better, Core i7-870 or Intel Core i5-750?

Based on our editorial ratings, the Core i7-870 comes out ahead with a score of 8/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.

Which is faster for gaming, Core i7-870 or Intel Core i5-750?

For gaming, the Core i7-870 leads with a gaming performance score of 37/100 among Core i7-870 and Intel Core i5-750.

Do Core i7-870 and Intel Core i5-750 use the same socket?

No. They use different sockets (Core i7-870: Intel Socket 1156, Intel Core i5-750: LGA 1156), so each needs a compatible motherboard.

Which is faster in multi-core benchmarks?

The Intel Core i5-750 posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-750 (6,750). Benchmark figures are approximate and workload-dependent.