CPU Comparison
Intel Core i5-10400 vs Intel Core i3-10320
A side-by-side comparison of specs, performance and value. The Intel Core i5-10400 is a 6-core, 12-thread desktop processor built on the 14nm Comet Lake architecture, offering solid mainstream performance with integrated UHD 630 graphics.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles everyday productivity and multitasking without issues.
Handles office suites and web apps well, but the 65W PL1 will cause throttling in long-running Excel macros or heavy multitasking.
Gaming
Capable of smooth 1080p gaming when paired with a mid-range GPU.
Requires a discrete GPU for gaming. The CPU itself can handle budget GPUs without severe bottlenecking at 1080p.
Virtualization
Suitable for basic virtualization needs with 12 threads.
4 cores and 8 threads can run a couple of light virtual machines, but it is not ideal for dedicated lab environments.
Efficiency
Power consumption is reasonable, though the 14nm process is less efficient than newer nodes.
The 14nm process shows its age; newer Ryzen 3 parts offer significantly better performance per watt.
Specialized Performance
AI / ML
- No dedicated AI hardware
- Relies on CPU-based AVX2 instructions for inference
- No AI acceleration hardware
- Lacks AVX-512 instructions
- Not suitable for AI workloads
Content Creation
Gaming
- Excellent 1080p performance
- Slightly limited by 2666 MT/s memory speed
- Best paired with GTX 1660 or RTX 3060 class GPUs
- UHD 630 iGPU cannot handle modern games
- CPU performance is adequate for entry-level dedicated GPUs
- Lacks PCIe 4.0 for future GPU upgrades
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Excellent value for money
- 6 cores and 12 threads
- Includes integrated graphics
- Low 65W base TDP
- Wide motherboard compatibility
Cons
- Locked multiplier
- 14nm process runs warmer under load
- Limited to PCIe 3.0
- Memory speed capped at 2666 MT/s natively
Pros
- High 4.6 GHz boost clock for snappy single-thread performance
- 8 threads provide good multitasking for the price
- Low 65W sustained power draw keeps temperatures down
- Includes enterprise features like TSX and TXT
- Solid performance for basic office environments
Cons
- OEM-exclusive, difficult to buy separately
- Confusing and misleading 91W TDP labeling
- DDR4-2666 memory speed cap
- Only 16 PCIe 3.0 lanes
- Outperformed by cheaper Ryzen 3 alternatives in multi-threaded tasks
Competitors & Alternatives
Intel Core i5-10400
- AMD Ryzen 5 3600Rival
Mainstream Desktop
- AMD Ryzen 5 2600Rival
Budget Desktop
- Compare head-to-headIntel Core i5-10400FRival
Mainstream Desktop
- Compare head-to-headIntel Core i5-9400Rival
Budget Desktop
- AMD Ryzen 3 3300XRival
Budget Desktop
- Intel Core i5-11400Alt
Offers better IPC and faster memory support.
A cheaper alternative for purely budget gaming.
Compare head-to-head- AMD Ryzen 5 5600Alt
Significantly faster single-core and gaming performance.
- Intel Core i5-12400Alt
Newer platform with DDR5 and PCIe 5.0 support.
Intel Core i3-10320
- AMD Ryzen 3 3100Rival
Budget Desktop
- AMD Ryzen 3 3300XRival
Budget Desktop
- AMD Athlon 3000GRival
Entry Desktop
- Intel Pentium Gold G6600Rival
Entry Desktop
- AMD Ryzen 5 1600 AFRival
Budget Desktop
Nearly identical performance but available at retail for a much lower price.
Compare head-to-headAdds 2 more cores for a significant multi-threaded boost at a reasonable price.
Compare head-to-head- AMD Ryzen 5 3600Alt
Superior multi-core performance, PCIe 4.0, and often priced competitively.
A massive generational leap in IPC and efficiency on the LGA 1700 platform.
Compare head-to-head
Our Verdict on Each
A highly cost-effective 6-core CPU that delivers excellent value for 1080p gaming and general computing, despite its locked multiplier and older 14nm process.
Best for: The Intel Core i5-10400 is highly recommended for users building a budget to mid-range 1080p gaming PC or a general-purpose home/office computer. Its 6-core, 12-thread configuration provides excellent longevity for everyday tasks, light content creation, and modern gaming when paired with a mid-range GPU like an RTX 3060 or RX 6600. The inclusion of UHD 630 graphics means the system is functional even if a discrete GPU fails or is delayed in purchase. Because it is a locked processor, there is no need to invest in expensive Z-series motherboards or high-end cooling; a simple B460 board and the stock cooler are sufficient. This makes it an ideal choice for budget-conscious buyers who prioritize stability, reliability, and maximum value over enthusiast-level tweaking or extreme frame rates.
Read the full reviewA capable 4-core processor for basic computing, but its OEM exclusivity and confusing 91W/65W power spec make it irrelevant for custom builders.
Best for: The Intel Core i3-10320 is not a processor you should actively seek out to build a new PC, primarily because it was never intended for the retail market. If you are upgrading an existing OEM desktop that currently houses this chip, it is generally not worth the investment to swap it out for an i5 or i7 due to motherboard BIOS restrictions common in pre-built systems. However, if you are purchasing a used office PC on the cheap that contains the i3-10320, it remains surprisingly capable for everyday tasks. Its 4 cores and 8 threads, combined with a 4.6 GHz boost clock, handle web browsing, office applications, and 1080p media consumption without breaking a sweat. Just be aware of the 65W PL1 limit, which may throttle sustained workloads, and the DDR4-2666 memory speed cap, which slightly bottlenecks the integrated UHD 630 graphics. Avoid it for any serious gaming or content creation.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i5-10400 or Intel Core i3-10320?
Based on our editorial ratings, the Intel Core i5-10400 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, Intel Core i5-10400 or Intel Core i3-10320?
For gaming, the Intel Core i5-10400 leads with a gaming performance score of 80/100 among Intel Core i5-10400 and Intel Core i3-10320.
Which uses less power?
The Intel Core i5-10400 has the lowest rated TDP. Power draw across these chips: Intel Core i5-10400 (65 W), Intel Core i3-10320 (91 W).
Do Intel Core i5-10400 and Intel Core i3-10320 use the same socket?
Yes — all of these CPUs use the LGA 1200 socket, so they share compatible motherboards.
Which has more cores?
The Intel Core i5-10400 has the most cores. Core counts: Intel Core i5-10400 (6 cores), Intel Core i3-10320 (4 cores).
Which is faster in multi-core benchmarks?
The Intel Core i5-10400 posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-10400 (14,500), Intel Core i3-10320 (0). Benchmark figures are approximate and workload-dependent.