Quick Verdict
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.
Overview
Launch
2020
Status
ActiveGeneration
10th Gen Core i5
Market
Desktop
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.
Featuring 6 cores and 12 threads, the Intel Core i5-10400 operates at a base clock of 2.9 GHz and boosts up to 4.3 GHz.
It includes UHD Graphics 630, making it a versatile choice for systems without a dedicated GPU, while offering enough processing power for modern 1080p gaming and multitasking. Its LGA 1200 socket ensures compatibility with a wide range of motherboards, providing an excellent balance of price and performance for budget builders. The processor comes with a 65W TDP, ensuring it runs cool and quiet under standard loads, though it can draw up to 134W during heavy turbo boost bursts to maximize performance.
Specifications
Performance
Handles everyday productivity and multitasking without issues.
Suitable for basic virtualization needs with 12 threads.
Capable of smooth 1080p gaming when paired with a mid-range GPU.
Power consumption is reasonable, though the 14nm process is less efficient than newer nodes.
- •Excellent 1080p performance
- •Slightly limited by 2666 MT/s memory speed
- •Best paired with GTX 1660 or RTX 3060 class GPUs
- •No dedicated AI hardware
- •Relies on CPU-based AVX2 instructions for inference
Architecture
14 nm
Process Node
Comet Lake
Codename
6C / 12T
Core Config
12 MB
L3 Cache
65 W
TDP
Architecture Overview
The Comet Lake architecture represents Intel's final refinement of the 14nm Skylake lineage, scaling up core counts to compete with AMD's Ryzen offerings. For the i5-10400, this means a shift from 4 cores to 6 cores, significantly improving multi-threaded headroom for desktop users. It utilizes a monolithic die design featuring 6 physical cores and 12 threads via Intel's Hyper-Threading technology. The ring bus architecture connects the cores to the 12MB L3 cache, ensuring low latency for gaming and productivity tasks. This design choice makes the processor highly responsive in single-threaded applications while maintaining respectable parallel processing capabilities.
CPU Design
The processor's memory controller officially supports dual-channel DDR4-2666, which is somewhat restrictive compared to AMD's higher supported speeds, but adequate for most workloads. It provides 16 PCIe 3.0 lanes directly from the CPU for graphics cards, while additional lanes are supplied by the motherboard chipset. Unlike its 'K' series counterparts, the i5-10400 features a locked multiplier, meaning core ratio overclocking is not possible, though memory and base clock tuning remain available on certain motherboards. The 14nm process allows for high clock speeds but results in higher power consumption compared to newer lithography nodes.
Memory Subsystem
Dual-channel DDR4-2666
PCIe & I/O
16 PCIe 3.0 lanes
Overclocking
Locked multiplier
- Added Hyper-Threading (12 threads vs 6)
- Higher boost clocks
- Improved platform features with LGA 1200
Key Highlights
- Excellent value for money
- 6 cores and 12 threads
- Includes integrated graphics
- Low 65W base TDP
- Wide motherboard compatibility
- Locked multiplier
- 14nm process runs warmer under load
- Limited to PCIe 3.0
- Memory speed capped at 2666 MT/s natively
History
Released in April 2020, the Core i5-10400 arrived during a critical period for Intel. Facing immense pressure from AMD's highly successful Ryzen 3000 series, Intel made the strategic decision to bring Hyper-Threading back to its non-K i5 desktop lineup. This move effectively doubled the thread count compared to the previous generation's i5-9400, providing a much-needed boost in multi-threaded performance to remain competitive.
Built on the refined 14nm Comet Lake architecture, it utilized the new LGA 1200 socket, giving users a platform that would later support the 11th Gen Rocket Lake processors. The i5-10400 quickly became a favorite among budget builders, offering a sweet spot of price and performance that made it one of the most popular processors of its era for 1080p gaming systems. Its success proved that mainstream users still highly valued cost-effective multi-threading.
Improvements over Previous Generation
- Added Hyper-Threading (12 threads vs 6)
- Higher boost clocks
- Improved platform features with LGA 1200
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
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.
Avoid if…
- You need high-refresh 1440p gaming
- You require DDR5 memory
- You want to overclock your CPU
Use Cases
Interesting Facts
The i5-10400 was the first non-K i5 desktop processor to feature Hyper-Threading since the Sandy Bridge era.
Despite being locked, memory overclocking is possible on B460 and Z490 motherboards.
It shares the same physical die as the i5-10400F, but with functional integrated graphics.
The processor's PL2 of 134W allows it to draw significantly more power than its 65W rating during heavy bursts.
It is fully compatible with Windows 11, though installation requires a TPM 2.0 module or firmware setting.
The Comet Lake architecture was originally intended for mobile platforms before being adapted for desktop.
Its integrated graphics, UHD 630, has been a staple in Intel's lineup since Kaby Lake.
The CPU supports Intel Quick Sync Video for fast hardware video encoding and decoding.
Under heavy multicore workloads, it can outperform older 8th gen i7 processors.
The LGA 1200 socket supports both 10th and 11th gen Intel processors, providing a small upgrade path.
People Also Ask
Is the Core i5-10400 good for gaming?
Yes, it is excellent for 1080p gaming when paired with a suitable graphics card.
Does the i5-10400 have integrated graphics?
Yes, it includes Intel UHD Graphics 630.
Can you overclock the i5-10400?
No, the CPU multiplier is locked, but you can adjust memory speeds.
What socket does the i5-10400 use?
It uses the Intel LGA 1200 socket.
Does the i5-10400 support DDR4?
Yes, it supports dual-channel DDR4 memory up to 2666 MT/s.
What is the TDP of the i5-10400?
The base TDP is 65W, with a maximum turbo power of 134W.
Is the i5-10400 compatible with Windows 11?
Yes, but it requires a TPM 2.0 module and Secure Boot.
What is the difference between i5-10400 and i5-10400F?
The i5-10400F lacks integrated graphics and is slightly cheaper.
Can the i5-10400 run 4K video?
Yes, its integrated graphics and CPU power can handle 4K video playback easily.
Is the i5-10400 better than the Ryzen 5 3600?
They are very close, but the Ryzen 5 3600 often has a slight edge in multi-threaded tasks.
Frequently Asked Questions
Does the Intel Core i5-10400 come with a cooler?
Yes, it includes an Intel stock cooler in the box.
What motherboards are compatible with the i5-10400?
It is compatible with Intel 400-series motherboards (H410, B460, Z490, etc.).
Does the i5-10400 support PCIe 4.0?
No, it only supports PCIe 3.0.
What is the max temperature for the i5-10400?
The maximum junction temperature (Tjmax) is 100°C.
Can I use DDR4-3200 RAM with the i5-10400?
Officially it supports up to 2666 MT/s, but faster RAM can be used, running at 2666 MT/s on non-Z motherboards.
Is the i5-10400 unlocked?
No, it has a locked multiplier.
How many cores does the i5-10400 have?
It has 6 physical cores and 12 threads.
What generation is the i5-10400?
It is a 10th generation Intel Core processor.
Does the i5-10400 support Hyper-Threading?
Yes, it supports Hyper-Threading, allowing 12 threads.
Is the i5-10400 good for streaming?
It can handle light streaming, but a dedicated GPU for encoding is recommended.