CPU Comparison

Core i7-870 vs Core i7-870S

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 i7
Core i7-870S
4C / 8T3.6 GHz82 W
7
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
Desktop
Segment
Desktop High-End
Desktop Low-Power
Generation
Core i7 (Lynnfield)
Core i7 (Lynnfield)
Launched
2009
2010
Status
End-of-life
End-of-life
Codename
Lynnfield
Lynnfield
Series
Core i7
Core i7
Family
1st Gen Core i7
1st Gen Core i7
Predecessor
Core 2 Quad Q9650
Core i7-860S
Successor
Core i7-2600
Core i7-2600S

Specifications Compared

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

Performance Compared

Productivity

Core i7-870Best38

Fastest Lynnfield at launch, but obsolete now.

Core i7-870S37

Slightly faster than 860S due to higher turbo.

Gaming

Core i7-870Best37

Handles old games well but bottlenecks modern titles.

Core i7-870S36

Good for legacy games but bottlenecks modern hardware.

Virtualization

Core i7-87042

Good for legacy VMs.

Core i7-870S42

Solid for legacy home labs.

Efficiency

Core i7-87045

95W TDP is acceptable for 45nm.

Core i7-870SBest52

Good efficiency for 45nm, better than standard 870.

Specialized Performance

AI / ML

Core i7-870None
  • No AI hardware
  • Unsuitable for modern inference
Core i7-870SNone
  • No AI hardware
  • Unsuitable for modern AI

Content Creation

Core i7-870Legacy
Legacy PremierePhotoshop3D Modeling
Core i7-870SLegacy
Legacy PhotoshopBasic Video Editing3D Modeling

Gaming

Core i7-870Legacy
  • PCIe 2.0 only
  • No AVX support
  • Requires discrete GPU
Core i7-870SLegacy
  • Requires discrete GPU
  • PCIe 2.0 only
  • Lacks AVX

Industry Impact

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

Best CPU by Use Case

High-End Gaming
Excellent (for 2009)
Video Editing
Very Good
3D Rendering
Good
Streaming
Moderate
AIO Computing
Excellent
SFF Gaming
Very Good
Content Creation
Good
Office Work
Overkill

Target Audience

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

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
Core i7-870S

Pros

  • 82W low TDP
  • High 3.6 GHz turbo
  • 8MB L3 cache
  • Quad-core with HT

Cons

  • Very rare and expensive
  • Obsolete platform
  • No integrated graphics
  • Locked multiplier

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.

Core i7-870S

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
Core i7-870SSituational

A solid low-power Lynnfield chip, but overpriced and niche compared to the standard i7-870.

Best for: Repairing a premium 2010 AIO PC.

Read the full review

Frequently Asked Questions

Which is better, Core i7-870 or Core i7-870S?

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 Core i7-870S?

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

Which uses less power?

The Core i7-870S has the lowest rated TDP. Power draw across these chips: Core i7-870 (95 W), Core i7-870S (82 W).

Do Core i7-870 and Core i7-870S use the same socket?

Yes — all of these CPUs use the Intel Socket 1156 socket, so they share compatible motherboards.