Based on our overall comparison score, Intel Core i5 1240U rates higher at 49/100 versus 46/100 for Intel Core i5 12400T — a 3-point lead. Intel Core i5 1240U is the stronger overall pick, though the right choice still depends on which specs matter most to you; the full spec table above breaks down every difference.
Intel Core i5 1240U vs Intel Core i5 12400T
Verdict
Our overall take, at a glance
Key takeaways
- Intel Core i5 12400T leads Intel Core i5 1240U overall by 12 points (57 vs 45 out of 100).
- Intel Core i5 12400T stands out on Core Specifications Base Frequency: 1.8 GHz, Core Specifications Base Power Consumption: 35 W, Core Specifications Maximum Power Consumption: 74 W.
Intel Core i5 12400T leads overall
Intel Core i5 12400T
57
Intel Core i5 1240U
45
Why it stands out
- Core Specifications Base Frequency: 1.8 GHz
- Core Specifications Base Power Consumption: 35 W
- Core Specifications Maximum Power Consumption: 74 W
In-depth analysisAI
AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 2026.
Intel Core i5 1240U
The Intel Core i5 1240U is a mobile processor designed for mainstream portable computing tasks. It falls under the widely adaptable Alder Lake architecture, giving it efficiency and solid performance characteristics. This CPU is best suited for general productivity work in laptops where power consumption and battery life are key concerns.
Best for general productivityBest for daily computingBest for students and basic home office users
Pros
- Benefit from the Alder Lake architecture's blend of performance and low power draw
- Suitable for multi-core workloads due to its modern design structure
- Offers good operating stability for common daily computing tasks
Cons
- Being a 'U' series processor indicates it prioritizes efficiency over peak sustained performance
- Performance on highly demanding professional applications may be limited by its power profile
Intel Core i5 12400T
The Core i5 12400T is a desktop-class CPU designed for everyday computing tasks and power-efficient systems. It uses Intel's Alder Lake architecture and features a lower Thermal Design Power (TDP) to optimize performance for smaller or less powerful form factor devices. This processor is ideal for users who require reliable performance without needing maximum cooling capacity.
Best for SFF PCsBest for Home office computingBest for Educational use
Pros
- Built on the efficient 12th generation Alder Lake microarchitecture
- Provides reliable multi-core processing suitable for general desktop tasks
- The 'T' designation indicates a lower power draw, improving compatibility with low-power and Small Form Factor (SFF) builds
Cons
- Its reduced TDP limits the peak performance potential compared to non-'T' variants of the same generation
- While capable for general use, it may lack the raw single-core performance needed for highly demanding tasks or competitive gaming.
Value for Money
Which is the better deal for the price
Pre-filled with launch prices where known — enter today's price for an up-to-date check. Use the same currency for both.
Intel Core i5 1240U
Intel Core i5 12400T
Performance
Higher benchmark score = faster
Intel Core i5 1240U14,323
Intel Core i5 12400T16,552
Benchmark score — a measured indicator of raw performance, not a guarantee of real-world speed.
Detailed Specifications
The full spec sheet, side by side
Frequently Asked Questions
Common questions about Intel Core i5 1240U vs Intel Core i5 12400T comparison
Intel Core i5 1240U and Intel Core i5 12400T are compared side by side above across every spec in the cpus category — including performance, features and design — each scored 0–100 so you can see exactly where one leads the other. Our overall scores are 49/100 for Intel Core i5 1240U and 46/100 for Intel Core i5 12400T.
If you want the higher-rated cpus option overall, Intel Core i5 1240U (49/100) edges out Intel Core i5 12400T (46/100). But if Intel Core i5 12400T is cheaper or stronger on the specific specs you care about, it can still be the better buy — use the spec table and strengths profile above to decide.
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