CPU Comparison
Intel Core i5-4670S vs Core i5-6400
A side-by-side comparison of specs, performance and value. The Intel Core i5-4670S, launched in June 2013, is a quad-core desktop processor designed for users who need strong performance within a constrained thermal envelope. As part of the Haswell generation, it features a 65-watt TDP, making it significantly more power-efficient than the standard 84-watt i5-4670. Operating at a base frequency of 3.1 GHz and turbo boosting up to 3.8 GHz, it delivers snappy single-threaded performance suitable for gaming and demanding applications. Built on a 22nm process, it houses 1.4 billion transistors and 6MB of L3 cache. The inclusion of Intel HD 4600 graphics ensures smooth 4K video playback and basic gaming capabilities. This processor was highly sought after for small form factor builds and home theater PCs where heat and noise reduction were priorities. It remains a capable chip for legacy systems and budget gaming setups.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Fast single-core speeds keep legacy apps feeling snappy.
Sufficient for basic office applications and web browsing, but struggles with heavy multitasking.
Gaming
Good for older games; will bottleneck modern GPUs in CPU-heavy titles.
Severely bottlenecks modern GPUs. Only playable in older or very light eSports titles.
Virtualization
Limited to light VMs due to 4 threads.
Limited to very light virtualization due to 4 threads.
Efficiency
Outstanding efficiency, hitting 3.8 GHz on just 65W.
Efficient for its time, but superseded by modern 10nm/Intel 7 processes.
Specialized Performance
AI / ML
- No dedicated AI hardware
- Slow for modern AI workloads
- No AI acceleration
- Insufficient threads for modern AI workloads
Content Creation
Gaming
- Pairs well with GTX 1050 Ti or RX 570
- Can handle CS:GO and Dota 2 easily
- Will struggle with modern CPU-bound games like Cyberpunk 2077
- Low base clock limits frame rates
- 4 cores cause stuttering in modern games
- Acceptable only for retro gaming
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- High 3.8 GHz turbo boost for single-core tasks
- Low 65W TDP
- Good for retro and e-sports gaming
- Supports vPro and TXT
- Reliable Haswell architecture
Cons
- Obsolete DDR3 platform
- Locked multiplier
- No Windows 11 support
- Bottlenecks modern GPUs
- Limited to 4 threads
Pros
- Low 65W TDP for easy cooling
- Supports both DDR4 and DDR3L memory
- Solid single-core performance for its generation
- Includes HD Graphics 530 for display tasks
Cons
- Only 4 cores and 4 threads
- Low base clock of 2.7 GHz
- Locked multiplier prevents overclocking
- Not supported by Windows 11
Competitors & Alternatives
Intel Core i5-4670S
- AMD FX-8350Rival
High-End Desktop
- Compare head-to-headIntel Core i5-4570Rival
Standard Desktop
- Compare head-to-headIntel Core i5-4670KRival
Enthusiast Desktop
- AMD FX-6300Rival
Budget Desktop
- Intel Core i7-4770SRival
Low Power Desktop
Newer Haswell Refresh with slightly higher clocks.
Compare head-to-headHyper-threaded alternative for more threads.
Compare head-to-head- AMD Ryzen 3 1300XAlt
Modern budget quad-core alternative.
Modern budget alternative.
Compare head-to-head- AMD Ryzen 5 1600Alt
Modern budget hexa-core alternative.
Core i5-6400
- AMD FX-8350Rival
Desktop
- Compare head-to-headIntel Core i5-6500Rival
Desktop
- AMD FX-6300Rival
Desktop
- Intel Core i3-6100Rival
Desktop
- AMD Ryzen 5 1400Rival
Desktop
Vastly better performance and platform for a similar budget.
Compare head-to-head- AMD Ryzen 5 3600Alt
More cores and threads for better multi-threaded workloads.
Slight performance bump on the same socket if upgrading cheaply.
Compare head-to-headHyper-threading on the same socket for better multi-core performance.
Compare head-to-head- AMD Ryzen 5 2600Alt
Modern alternative with more threads and better upgrade path.
Our Verdict on Each
The fastest 'S' series Haswell i5 at launch, offering excellent single-core performance with 65W efficiency.
Best for: Drop-in upgrade for older LGA 1150 systems.
Read the full reviewThe Core i5-6400 was a fantastic budget CPU in 2015, but its 4-core/4-thread design and low clock speeds make it heavily outdated for modern gaming and productivity.
Best for: Building a retro gaming PC or basic office machine from used parts
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i5-4670S or Core i5-6400?
Based on our editorial ratings, the Intel Core i5-4670S comes out ahead with a score of 7.2/10. 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, Intel Core i5-4670S or Core i5-6400?
For gaming, the Intel Core i5-4670S leads with a gaming performance score of 52/100 among Intel Core i5-4670S and Core i5-6400.
Do Intel Core i5-4670S and Core i5-6400 use the same socket?
No. They use different sockets (Intel Core i5-4670S: LGA 1150, Core i5-6400: LGA 1151), so each needs a compatible motherboard.
Which is faster in multi-core benchmarks?
The Intel Core i5-4670S posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-4670S (3,900). Benchmark figures are approximate and workload-dependent.