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.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Fastest Lynnfield at launch, but obsolete now.
Slightly faster than 860S due to higher turbo.
Gaming
Handles old games well but bottlenecks modern titles.
Good for legacy games but bottlenecks modern hardware.
Virtualization
Good for legacy VMs.
Solid for legacy home labs.
Efficiency
95W TDP is acceptable for 45nm.
Good efficiency for 45nm, better than standard 870.
Specialized Performance
AI / ML
- No AI hardware
- Unsuitable for modern inference
- No AI hardware
- Unsuitable for modern AI
Content Creation
Gaming
- PCIe 2.0 only
- No AVX support
- Requires discrete GPU
- Requires discrete GPU
- PCIe 2.0 only
- Lacks AVX
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
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
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 965Rival
Desktop High-End
- Compare head-to-headIntel Core i5-750Rival
Desktop Mainstream
- Compare head-to-headIntel Core i7-920Rival
Desktop High-End
- AMD Phenom II X6 1055TRival
Desktop High-End
- Intel Core 2 Quad Q9650Rival
Legacy High-End
- Intel Core i7-860Alt
Cheaper, similar performance in most tasks.
- Intel Core i7-875KAlt
Unlocked alternative for overclocking.
- Intel Core i7-2600Alt
The direct Sandy Bridge successor.
Core i7-870S
- AMD Phenom II X4 905eRival
Desktop Low-Power
- Intel Core i7-860SRival
Desktop Low-Power
- Intel Core i7-870Rival
Desktop High-End
- Compare head-to-headIntel Core i5-750SRival
Desktop Low-Power
- AMD Phenom II X4 945Rival
Desktop Mainstream
- Intel Core i7-875KAlt
Unlocked alternative if overclocking is desired.
Vastly superior Sandy Bridge alternative.
Compare head-to-head
Our Verdict on Each
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 reviewA 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 reviewFrequently 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.