CPU Comparison
Core i5-1245U vs Intel Core Ultra 5 125U
A side-by-side comparison of specs, performance and value. The Intel Core i5-1245U is a mobile processor designed for thin-and-light laptops, offering a balanced approach to everyday computing. As part of the Alder Lake-U family, it features 10 cores and 12 threads, utilizing a hybrid architecture of 2 Performance-cores and 8 Efficient-cores. This design allows it to handle bursty workloads efficiently while maintaining excellent battery life. Unlike its sibling, the 1235U, the 1245U steps up the base clock speed to 1.6 GHz on its P-cores, offering slightly snappier response times in everyday tasks. With a 15W base TDP and the ability to boost up to 55W for short bursts, it adapts dynamically to thermal conditions. Integrated Iris Xe graphics with 80 Execution Units handle light gaming and media decoding with ease. This chip is a solid choice for professionals needing reliable performance in a portable form factor.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Excellent for office apps, heavy browsing, and light coding.
Handles everyday office tasks and multitasking smoothly without overheating.
Gaming
Good for casual and older titles at 1080p low settings.
Only suitable for very light or older games. Not recommended for modern AAA gaming.
Virtualization
Can handle light VMs, but memory bandwidth is a limit.
Can run basic VMs, but the 2 P-cores limit heavy virtualization performance.
Efficiency
Dynamic power management ensures excellent battery life.
Excellent efficiency with a 15W TDP, ensuring long battery life for ultraportables.
Specialized Performance
AI / ML
- Intel GNA 3.0 for background AI tasks
- 11 TOPS NPU is suitable for background blur and noise cancellation
- Does not meet Copilot+ PC requirements
- Handles lightweight inference tasks
Content Creation
Gaming
- Can run eSports titles at 60fps
- Shares system memory, so RAM speed affects FPS
- 64 EU graphics are adequate for 2D and indie games
- Can run older AAA titles at 720p low settings
- Not designed for gaming enthusiasts
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
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
Pros
- Excellent 15W power efficiency
- Good multitasking for everyday apps
- Quiet and cool operation
- Includes 2 LP E-cores for background tasks
- Hardware media acceleration
Cons
- Limited to 2 P-cores for heavy lifting
- Only 64 EU graphics
- 11 TOPS NPU is relatively weak
- No PCIe 5.0 support
Competitors & Alternatives
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
Intel Core Ultra 5 125U
- AMD Ryzen 5 8640URival
Mobile
- AMD Ryzen 7 8840URival
Mobile
- Intel Core Ultra 7 155URival
Mobile
- Qualcomm Snapdragon X PlusRival
Mobile
- Compare head-to-headApple M2Rival
Mobile
- Core Ultra 5 125HAlt
A better alternative if you need more CPU and graphics performance.
An even more power-efficient option for ultra-thin laptops.
Compare head-to-head- Snapdragon X PlusAlt
An ARM-based alternative offering exceptional battery life.
Our Verdict on Each
A 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 reviewA solid, efficient processor for everyday ultrabooks, offering good multitasking capabilities and decent battery life, though its NPU is modest.
Best for: Everyday ultrabook for office work and student use
Read the full reviewFrequently Asked Questions
Which is better, Core i5-1245U or Intel Core Ultra 5 125U?
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, Core i5-1245U or Intel Core Ultra 5 125U?
For gaming, the Core i5-1245U leads with a gaming performance score of 62/100 among Core i5-1245U and Intel Core Ultra 5 125U.
Do Core i5-1245U and Intel Core Ultra 5 125U use the same socket?
No. They use different sockets (Core i5-1245U: Intel BGA 1744, Intel Core Ultra 5 125U: Intel BGA 2049), so each needs a compatible motherboard.
Which has more cores?
The Intel Core Ultra 5 125U has the most cores. Core counts: Core i5-1245U (10 cores), Intel Core Ultra 5 125U (12 cores).