CPU Comparison
Intel Core i3-1215U vs Core i5-1245U
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.
Excellent for office apps, heavy browsing, and light coding.
Gaming
Not designed for gaming. The UHD 64EU can handle very light casual titles but modern AAA games are unplayable.
Good for casual and older titles at 1080p low settings.
Virtualization
8 threads allow for a lightweight VM alongside host tasks, but this is not a virtualization-focused part.
Can handle light VMs, but memory bandwidth is a limit.
Efficiency
The 15W base TDP with Intel's Thread Director scheduler enables efficient power distribution between P and E cores.
Dynamic power management ensures excellent battery life.
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
- Intel GNA 3.0 for background AI tasks
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
- Can run eSports titles at 60fps
- Shares system memory, so RAM speed affects FPS
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
- Excellent balance of performance and 15W power draw
- 10 cores for heavy multitasking
- Supports fast DDR5 memory
- Strong single-core performance for an ultrabook chip
- Good integrated graphics
Cons
- Not suitable for heavy gaming
- Locked multiplier
- Soldered to motherboard
- Can run warm under sustained all-core loads
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.
Core i5-1245U
- AMD Ryzen 5 5625URival
Mobile
- AMD Ryzen 7 5825URival
Mobile
- Compare head-to-headIntel Core i7-1255URival
Mobile
- Compare head-to-headIntel Core i5-1235URival
Mobile
- Compare head-to-headApple M1Rival
Mobile
Better graphics and slightly higher clocks for premium ultrabooks.
Compare head-to-headMore P-cores for better sustained performance.
Compare head-to-head- Intel Core i5-1230UAlt
Lower TDP variant for ultimate portability.
Budget alternative for basic office 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 U-series processor that hits the sweet spot for everyday productivity and portable computing.
Best for: Mainstream thin-and-light laptops
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i3-1215U or Core i5-1245U?
Based on our editorial ratings, the Core i5-1245U comes out ahead with a score of 8.6/10. 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 Core i5-1245U?
For gaming, the Core i5-1245U leads with a gaming performance score of 62/100 among Intel Core i3-1215U and Core i5-1245U.
Do Intel Core i3-1215U and Core i5-1245U use the same socket?
No. They use different sockets (Intel Core i3-1215U: BGA 1744, Core i5-1245U: Intel BGA 1744), so each needs a compatible motherboard.
Which has more cores?
The Core i5-1245U has the most cores. Core counts: Intel Core i3-1215U (6 cores), Core i5-1245U (10 cores).
Which is faster in multi-core benchmarks?
The Core i5-1245U posts the highest multi-core benchmark score. Multi-core results: Core i5-1245U (0). Benchmark figures are approximate and workload-dependent.