CPU Comparison
Intel Core i5-10400F vs Core i5-6400
A side-by-side comparison of specs, performance and value. The Intel Core i5-10400F is a 6-core, 12-thread desktop processor that disables integrated graphics, offering excellent value for budget gaming rigs equipped with a dedicated GPU.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles everyday applications and multitasking efficiently.
Sufficient for basic office applications and web browsing, but struggles with heavy multitasking.
Gaming
Excellent 1080p gaming performance when paired with a mid-range GPU.
Severely bottlenecks modern GPUs. Only playable in older or very light eSports titles.
Virtualization
Capable of running basic virtual machines.
Limited to very light virtualization due to 4 threads.
Efficiency
Standard 14nm efficiency, adequate for a 65W TDP.
Efficient for its time, but superseded by modern 10nm/Intel 7 processes.
Specialized Performance
AI / ML
- No dedicated AI hardware
- Basic CPU inference only
- No AI acceleration
- Insufficient threads for modern AI workloads
Content Creation
Gaming
- Ideal for 1080p high-refresh gaming
- Pairs well with GTX 1660 Super or RTX 3060
- No integrated graphics means a GPU is mandatory
- 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
- Excellent value for money
- 6 cores and 12 threads
- Low 65W base TDP
- Wide motherboard compatibility
- Ideal for budget gaming
Cons
- No integrated graphics
- Locked multiplier
- Limited to PCIe 3.0
- Memory speed capped at 2666 MT/s natively
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 i5-10400F
- AMD Ryzen 5 3600Rival
Budget Gaming
- Compare head-to-headIntel Core i5-10400Rival
Mainstream Desktop
- AMD Ryzen 5 2600Rival
Budget Gaming
- Intel Core i3-10100FRival
Budget Gaming
- AMD Ryzen 3 3300XRival
Budget Gaming
Better IPC and PCIe 4.0 support on 500-series boards.
Compare head-to-head- AMD Ryzen 5 5600Alt
Significantly better gaming performance and efficiency.
- Intel Core i5-12400FAlt
Modern Alder Lake architecture with much better performance.
Cheaper, faster single-core, great for ultra-budget gaming.
Compare head-to-head
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
By removing the integrated graphics, Intel created a highly affordable 6-core CPU that maximizes value for gamers who already own a discrete GPU.
Best for: The Intel Core i5-10400F is highly recommended for budget-conscious gamers building a 1080p system with a dedicated graphics card. By cutting out the integrated graphics, it saves money that can be better spent on a stronger GPU, making it an ideal pairing for cards like the GTX 1660 Super or RTX 3060. Its 6-core, 12-thread design ensures it won't bottleneck mid-range GPUs in most modern games. Because it is locked, you don't need to spend extra on Z-series motherboards or fancy coolers; a B460 board and stock cooling are perfectly adequate. It is perfect for students or first-time builders who want a reliable, plug-and-play experience. Avoid it only if you absolutely need integrated graphics as a fallback or if you plan on overclocking.
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 i5-10400F or Core i5-6400?
Based on our editorial ratings, the Intel Core i5-10400F comes out ahead with a score of 8.2/10. 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 i5-10400F or Core i5-6400?
For gaming, the Intel Core i5-10400F leads with a gaming performance score of 85/100 among Intel Core i5-10400F and Core i5-6400.
Do Intel Core i5-10400F and Core i5-6400 use the same socket?
No. They use different sockets (Intel Core i5-10400F: LGA 1200, Core i5-6400: LGA 1151), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i5-10400F has the most cores. Core counts: Intel Core i5-10400F (6 cores), Core i5-6400 (4 cores).
Which is faster in multi-core benchmarks?
The Intel Core i5-10400F posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-10400F (14,600). Benchmark figures are approximate and workload-dependent.