CPU Comparison
Intel Core i3-1215U vs Intel Core i5-1240U
A side-by-side comparison of specs, performance and value. The Intel Core i3-1215U is a 6-core (2P+4E), 8-thread mobile processor built on the Alder Lake-U architecture, featuring UHD Graphics 64EU and a 15W base TDP for mainstream thin-and-light laptops.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles standard office applications and web browsing smoothly. Heavier multitasking with many browser tabs and applications can show some slowdown.
Handles office tasks and browser tabs well, though burst limits are low.
Gaming
Not designed for gaming. The UHD 64EU can handle very light casual titles but modern AAA games are unplayable.
Only suitable for 2D or very old 3D games at low resolutions.
Virtualization
8 threads allow for a lightweight VM alongside host tasks, but this is not a virtualization-focused part.
Can run a light VM, but heavily constrained by the 9W power limit.
Efficiency
The 15W base TDP with Intel's Thread Director scheduler enables efficient power distribution between P and E cores.
Exceptional efficiency, allowing for multi-day battery life in small batteries.
Specialized Performance
AI / ML
- No dedicated AI acceleration hardware
- 2 P-cores provide limited CPU inference capability
- Not suitable for AI or ML development workloads
- Handles basic background blur.
- Not suited for any demanding AI workloads.
Content Creation
Gaming
- Not designed for gaming workloads
- UHD 64EU can manage 2D games and very basic 3D
- Modern AAA titles will not run at playable frame rates
- Older eSports titles at lowest settings may be marginally playable
- iGPU is capped at 900 MHz to save power.
- Best for hardware video decoding and simple 2D games.
- Not suitable for 3D gaming.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Hybrid architecture brings efficiency gains to the i3 tier
- 2 P-cores provide responsive single-threaded performance
- 4 E-cores handle background tasks without waking P-cores
- Broad memory compatibility for OEM flexibility
- 15W TDP enables excellent battery life
- 20 PCIe Gen 4 lanes for fast storage
Cons
- Only 8 threads limit heavy multitasking
- 15W base power constrains sustained performance
- E-cores lack Hyper-Threading
- UHD 64EU integrated graphics are weak for 3D workloads
- BGA package means no CPU upgrade path
- E-core L2 cache is 2MB per module (less than Raptor Lake's 4MB)
Pros
- Exceptional 9W power efficiency
- Allows for silent, fanless designs
- 10 cores for great everyday multitasking
- Supports LPDDR5 memory
- Excellent battery life
Cons
- Very low boost power limit (29W)
- iGPU clocked very low (900 MHz)
- Not suitable for heavy workloads
- Soldered to the motherboard
Competitors & Alternatives
Intel Core i3-1215U
- AMD Ryzen 3 5300URival
Budget Mobile
- AMD Ryzen 5 5500URival
Mainstream Mobile
- AMD Ryzen 5 5625URival
Mainstream Mobile
- Apple M1 (base)Rival
Premium Mobile
- Compare head-to-headIntel Core i5-1235URival
Mid-Range Mobile
Raptor Cove P-cores offer better IPC and higher boost clocks for similar power.
Compare head-to-head- AMD Ryzen 3 5425UAlt
Zen 3 architecture provides competitive efficiency for basic computing tasks.
- Apple M1 (base MacBook Air)Alt
Dramatically better performance per watt and battery life at a higher price point.
Intel Core i5-1240U
- AMD Ryzen 5 5425URival
Mobile
- Compare head-to-headApple M2Rival
Mobile
- Compare head-to-headIntel Core i3-1215URival
Mobile
- Compare head-to-headIntel Core i7-1250URival
Mobile
- Qualcomm Snapdragon 8cx Gen 3Rival
Mobile
Higher base power (15W) for slightly better sustained performance.
Compare head-to-head- Alt
Industry-leading efficiency and performance for fanless designs.
Compare head-to-head - AMD Ryzen 5 6600UAlt
Better iGPU and higher power for standard thin-and-lights.
More threads and higher clocks if you need slightly more power.
Compare head-to-headBudget alternative for basic tasks.
Compare head-to-head
Our Verdict on Each
A competent entry-level hybrid mobile chip that introduced the P+E architecture to the i3 laptop segment. Adequate for everyday tasks, though the 8-thread ceiling and 15W power limit constrain heavier workloads.
Best for: Purchasing a budget to mid-range laptop in 2022-2023 for everyday tasks, schoolwork, and office use where battery life matters more than raw performance.
Read the full reviewA highly efficient 9W processor that balances 10-core multitasking with extreme battery life, perfect for the most portable form factors.
Best for: Buying an ultra-thin 2-in-1 convertible or a fanless tablet for note-taking and travel.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i3-1215U or Intel Core i5-1240U?
Based on our editorial ratings, the Intel Core i5-1240U 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 i3-1215U or Intel Core i5-1240U?
For gaming, the Intel Core i5-1240U leads with a gaming performance score of 35/100 among Intel Core i3-1215U and Intel Core i5-1240U.
Which uses less power?
The Intel Core i5-1240U has the lowest rated TDP. Power draw across these chips: Intel Core i3-1215U (15 W), Intel Core i5-1240U (9 W).
Do Intel Core i3-1215U and Intel Core i5-1240U use the same socket?
No. They use different sockets (Intel Core i3-1215U: BGA 1744, Intel Core i5-1240U: Intel BGA 1781), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i5-1240U has the most cores. Core counts: Intel Core i3-1215U (6 cores), Intel Core i5-1240U (10 cores).