Quick Verdict
A highly efficient 9W chip that brings desktop-class hybrid architecture to the thinnest form factors, though multi-core performance is limited by power constraints.
Overview
Launch
2022
Status
ActiveGeneration
12th Generation
Market
Mobile
The Intel Core i7-1250U is an ultra-low power 9W mobile processor designed for fanless thin-and-light laptops and tablets, featuring a 10-core hybrid architecture.
The Intel Core i7-1250U is built for the most portable devices. With a base TDP of just 9W, it operates without active cooling in many designs. It features 2 P-cores and 8 E-cores, prioritizing efficiency.
While it supports LPDDR5 memory for high bandwidth at low power, its performance is heavily gated by its thermal limits. It is perfect for business travelers needing all-day battery life.
Specifications
Performance
Snappy for everyday office tasks and web browsing, but struggles under sustained heavy multi-threaded loads.
Not recommended for virtual machines due to low core count and strict power limits.
Severely limited by the 9W TDP and potential thermal throttling in fanless designs. Only suitable for very light 2D games.
Exceptional efficiency, offering some of the best battery life figures in the 12th Gen lineup.
- •9W TDP heavily restricts GPU boost duration
- •Only playable for older or 2D indie games
- •Not suitable for modern 3D gaming
- •Low power limits restrict AI inference capabilities
- •No dedicated NPU
Architecture
10 nm
Process Node
Alder Lake-U
Codename
10C / 12T
Core Config
12 MB
L3 Cache
29 W
TDP
Architecture Overview
Alder Lake-U is optimized for extreme efficiency, reducing the P-core count to 2 while maximizing E-cores for background processing.
CPU Design
Features 2 Golden Cove P-cores and 8 Gracemont E-cores, totaling 10 cores and 12 threads within a 9W envelope.
Memory Subsystem
Supports exclusively low-power memory (LPDDR4X and LPDDR5) to save board space and reduce energy consumption.
PCIe & I/O
Supports PCIe 4.0, though lane count is determined by the specific OEM implementation.
Overclocking
Fully locked processor, strictly managed by OEM power profiles.
- Addition of 8 E-cores over the previous 4-core design
- LPDDR5 support
- Improved power gating
Key Highlights
- Extremely low 9W base power consumption
- Excellent for fanless and silent designs
- Supports fast LPDDR5 memory
- Decent single-core burst performance
- Strong integrated graphics for its power class
- Severely limited multi-core performance
- Low PL2 ceiling (29W) limits burst duration
- Only 2 P-cores for heavy threads
- Uses BGA 1781 socket, fully soldered
- Not suitable for heavy workloads
History
The Core i7-1250U was launched to address the growing market of extreme ultrabooks and Windows tablets competing directly with Apple's iPad and MacBook Air lines. By limiting the TDP to 9W, Intel enabled manufacturers to create completely silent, fanless devices without sacrificing the modern hybrid architecture. This chip carried the torch from the older 9W Tiger Lake-UP3 parts.
</br>The 1250U demonstrated Intel's commitment to scaling their architecture down to the lowest power envelopes. While the performance ceiling was obviously lower than its 15W and 28W siblings, it proved that the Thread Director and Gracemont E-cores could operate efficiently in 9W scenarios. It became a niche product, favored by business users who valued absolute silence and 15+ hour battery life over raw computational speed.
Improvements over Previous Generation
- Addition of 8 E-cores over the previous 4-core design
- LPDDR5 support
- Improved power gating
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Buying an ultra-thin tablet or fanless laptop where battery life is the absolute top priority.
Avoid if…
- You need sustained multi-core performance
- You plan on doing video editing
- You want to play 3D games
- You run heavy virtual machines
Use Cases
Interesting Facts
The Core i7-1250U has a base TDP of only 9 watts.
It uses the Intel BGA 1781 socket.
The part number is officially listed as 'unknown' in standard databases.
It supports LPDDR5 memory up to 5200 MT/s.
The maximum turbo power is just 29W.
It features 2 P-cores and 8 E-cores.
The L3 cache is 12 MB.
The base clock is a low 1100 MHz.
It was launched on February 23rd, 2022.
It does not support standard DDR4 or DDR5 memory, only LP variants.
People Also Ask
What is the TDP of the Intel Core i7-1250U?
The base TDP is 9 watts, with a maximum configurable turbo power of 29 watts.
Is the i7-1250U good for gaming?
No, the 9W power limit severely restricts performance. It is only suitable for very light 2D or older games.
What is the difference between i7-1250U and i7-1255U?
The i7-1250U is a 9W chip for fanless designs, while the i7-1255U is a 15W chip for standard ultrabooks, offering better sustained performance.
Does the Core i7-1250U support DDR5?
It supports LPDDR5-5200 and LPDDR4X-4267, but not standard DIMM memory.
How many cores does the i7-1250U have?
It has 10 cores: 2 Performance cores and 8 Efficient cores.
Can the i7-1250U be overclocked?
No, the multiplier is locked and power limits are strictly controlled.
What socket does the i7-1250U use?
It uses the Intel BGA 1781 socket, meaning it is soldered to the motherboard.
Does the i7-1250U have integrated graphics?
Yes, it features Intel Iris Xe graphics with 96 Execution Units.
When was the i7-1250U released?
It was released on February 23rd, 2022.
Is the i7-1250U good for video editing?
It can handle very light 1080p editing, but its low power makes it unsuitable for serious video production.
Frequently Asked Questions
Does the Core i7-1250U support ECC memory?
No, it does not support ECC memory.
What is the max turbo frequency of the i7-1250U?
The maximum turbo frequency on the P-cores is 4.7 GHz.
How much L3 cache does the i7-1250U have?
It has 12 MB of L3 cache.
What is the base clock of the i7-1250U E-cores?
The E-cores have a base clock of 800 MHz.
Does the i7-1250U support PCIe 4.0?
Yes, it supports PCIe 4.0, though the exact lane count depends on the OEM.
What is the maximum operating temperature of the i7-1250U?
The maximum junction temperature is 100°C.
Is the i7-1250U suitable for programming?
It is fine for basic web development, but not ideal for heavy compiling due to the 9W limit.
What memory types does the i7-1250U support?
It supports LPDDR4X-4267 and LPDDR5-5200.
What generation is the Core i7-1250U?
It is a 12th Generation Intel Core processor.
Does the i7-1250U have a fan?
Laptops with this chip are often fanless, though some designs may include a small fan for the 29W boost phase.