CPU Comparison
Intel Core i5-10400 vs Intel Core i9-9900T
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.
Strong multi-threaded capability for office applications and light creative work.
Gaming
Capable of smooth 1080p gaming when paired with a mid-range GPU.
Lower clocks limit high-refresh-rate gaming, but integrated graphics handle casual titles.
Virtualization
Suitable for basic virtualization needs with 12 threads.
Sufficient for basic virtualization tasks, but not ideal for heavy VM workloads.
Efficiency
Power consumption is reasonable, though the 14nm process is less efficient than newer nodes.
Exceptional power efficiency is the primary design goal and key strength.
Specialized Performance
AI / ML
- No dedicated AI hardware
- Relies on CPU-based AVX2 instructions for inference
- No dedicated AI acceleration
- Only suitable for lightweight, CPU-based inference
Content Creation
Gaming
- Excellent 1080p performance
- Slightly limited by 2666 MT/s memory speed
- Best paired with GTX 1660 or RTX 3060 class GPUs
- Not intended for serious gaming
- Limited by low base and boost clocks
- UHD Graphics 630 suitable only for very light or older games
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
- Exceptionally low 35W TDP for quiet and cool operation
- Full 8-core/16-thread Coffee Lake performance
- Configurable down to 25W for embedded or low-power designs
- Integrated graphics for display output without a GPU
- Often available at a deep discount on the used market
Cons
- Significantly lower clock speeds than standard desktop CPUs
- Locked multiplier limits performance tuning
- On the older LGA1151 platform with no future upgrade path
- Discontinued, with limited availability and support
- Not competitive for gaming or performance-critical 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 i9-9900T
- AMD Ryzen 7 2700XRival
High-Performance Desktop
- Intel Core i7-9700TRival
Power-Optimized Desktop
- Compare head-to-headIntel Core i5-9500TRival
Power-Optimized Desktop
- AMD Ryzen 5 3400GERival
Power-Optimized Desktop APU
- Compare head-to-headIntel Core i9-9900Rival
Standard Desktop
Much higher performance for gaming and productivity, but requires better cooling and power.
Compare head-to-headFar superior performance, modern platform, and efficiency; a better new buy.
Compare head-to-head- AMD Ryzen 7 5700GAlt
Strong APU with better integrated graphics and comparable efficiency.
Excellent single-thread performance and efficiency for basic tasks on a modern platform.
Compare head-to-head- AMD Ryzen 5 5600Alt
Better overall performance and value on a more modern platform.
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 8-core CPU that trades raw clock speed for significantly lower power consumption, ideal for specific use cases where efficiency and thermals matter more than maximum performance.
Best for: Building or upgrading a very quiet, small form factor PC where low power and heat are critical, and the CPU can be found at a significant discount.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i5-10400 or Intel Core i9-9900T?
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 i9-9900T?
For gaming, the Intel Core i5-10400 leads with a gaming performance score of 80/100 among Intel Core i5-10400 and Intel Core i9-9900T.
Which uses less power?
The Intel Core i9-9900T has the lowest rated TDP. Power draw across these chips: Intel Core i5-10400 (65 W), Intel Core i9-9900T (35 W).
Do Intel Core i5-10400 and Intel Core i9-9900T use the same socket?
No. They use different sockets (Intel Core i5-10400: LGA 1200, Intel Core i9-9900T: FCLGA1151), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i9-9900T has the most cores. Core counts: Intel Core i5-10400 (6 cores), Intel Core i9-9900T (8 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 i9-9900T (13,086). Benchmark figures are approximate and workload-dependent.