CPU Comparison

Intel Core i5-1235U vs Intel Core Ultra 5 135UL

A side-by-side comparison of specs, performance and value. The Intel Core i5-1235U is a low-power mobile processor from the 12th Generation Alder Lake-U family, launched in February 2022.

Intel · Core i5
Intel Core i5-1235U
10C / 12T4.4 GHz15 W
8.2
Full review
Intel · Core Ultra 5
Intel Core Ultra 5 135UL
12C / 14T4.4 GHz15 W
8.2
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Mobile
Desktop
Segment
Thin & Light / Everyday
Desktop
Generation
12th Gen
Ultra 5 (Meteor Lake-PS)
Launched
2022
2024
Status
Active
Active
Codename
Alder Lake-U
Meteor Lake-PS
Series
Core i5
Core Ultra 5
Family
Alder Lake-U
Meteor Lake-PS
Predecessor
Intel Core i5-1135G7
Intel Core i5-14400T
Successor
Intel Core i5-1335U
Pending

Specifications Compared

Cores & Clocks
Cores
10
12
Threads
12
14
Base Clock
1.3 GHz
1.6 GHz
Boost Clock
4.4 GHz
4.4 GHz
Cache & Power
L3 Cache
12 MB
12 MB
TDP
15 W
15 W
Architecture
Architecture
Alder Lake-U
Meteor Lake-PS
Process Node
10 nm
7 nm (Intel 4 Compute Tile)
Memory
Memory Type
DDR4, DDR5, LPDDR4x, LPDDR5
DDR5
Memory Speed
DDR4-3200, DDR5-4800, LPDDR4x-4267, LPDDR5-5200
DDR5-5600
Memory Channels
Dual (2)
Dual (2)
Max Memory
64 GB
96 GB
Platform & I/O
Socket
Intel BGA 1744
Intel Socket 1851
PCIe Version
PCIe 4.0
PCIe 4.0
PCIe Lanes
20
8
Integrated GPU
Yes
Yes
Unlocked
No
No

Performance Compared

Productivity

Intel Core i5-1235UBest80

Handles office tasks and heavy browser tabs effortlessly.

Intel Core Ultra 5 135UL78

Snappy office performance due to higher turbo clocks.

Gaming

Intel Core i5-1235U45

Only suitable for very light or older 2D games.

Intel Core Ultra 5 135UL45

Not intended for 3D gaming.

Virtualization

Intel Core i5-1235U50

Can run a light VM, but core count is low for heavy dev work.

Intel Core Ultra 5 135ULBest65

Capable of light server duties but limited by power.

Efficiency

Intel Core i5-1235U95

Top-tier efficiency, allowing for all-day battery life in ultrabooks.

Intel Core Ultra 5 135ULBest99

Exceptional power-to-performance ratio for edge computing.

Specialized Performance

AI / ML

Intel Core i5-1235ULow
  • Handles background blur and basic audio enhancement.
  • Not suited for AI development or inference.
Intel Core Ultra 5 135ULGood
  • NPU ideal for smart retail
  • 11 TOPS for vision models
  • Low power AI processing

Content Creation

Intel Core i5-1235UModerate
Basic PhotoshopWeb Graphic DesignAudio Editing
Intel Core Ultra 5 135ULFair
Media PlaybackBasic Photo Editing

Gaming

Intel Core i5-1235ULow
  • Iris Xe 80EU is sufficient for hardware video decoding.
  • Not recommended for 3D gaming.
  • Can handle Minecraft or CS:GO at low settings.
Intel Core Ultra 5 135ULLow
  • 64EU graphics is enough for display out
  • Not for gaming
  • Good hardware media decode

Industry Impact

Gaming
Low
None
Workstations
Low
Low
Content Creation
Moderate
Low
Virtualization
Low
Moderate

Best CPU by Use Case

Web Browsing
Excellent
Office Applications
Excellent
Video Streaming
Excellent
Light Coding
Very Good
Digital Signage
Excellent
Office PC
Excellent
Edge AI Node
Excellent
Home Server
Very Good
Gaming
Poor

Target Audience

Gamers
Content Creators
Developers
Targeted
Targeted
Workstation Users
Streamers
Office / Productivity
Targeted
Targeted
Students
Targeted
Targeted

Strengths & Weaknesses

Intel Core i5-1235U

Pros

  • Excellent power efficiency (15W base TDP)
  • 10 cores provide great multitasking
  • Supports fast LPDDR5 memory
  • Good single-core burst performance
  • Hardware AV1 decoding

Cons

  • Only 2 P-cores limit heavy workloads
  • Basic integrated graphics
  • Locked multiplier
  • Soldered to the motherboard
Intel Core Ultra 5 135UL

Pros

  • Excellent low-power operation
  • Higher turbo clocks than 125UL
  • Integrated NPU for AI
  • Socketed LGA 1851 design
  • Good for silent PC builds

Cons

  • Not for gaming
  • Limited PCIe lanes
  • Locked multiplier
  • Low base clock speeds

Competitors & Alternatives

Intel Core i5-1235U

Intel Core Ultra 5 135UL

Our Verdict on Each

A highly efficient 15W processor that brings 10-core hybrid architecture to mainstream laptops, offering excellent battery life and solid daily performance.

Best for: Buying a thin-and-light laptop for school, office work, or general everyday use.

Read the full review

A strong low-power desktop CPU offering slightly better burst performance than the 125UL, ideal for SFF and edge AI.

Best for: The Core Ultra 5 135UL is an excellent processor for niche desktop applications requiring low power consumption and integrated AI capabilities. If you are constructing a small form factor PC for a home theater, a network appliance, or a lightweight office machine that runs 24/7, the 135UL provides a perfect balance of adequate performance and minimal heat output. The slight clock speed increase over the 125UL makes it better suited for occasional heavier tasks like photo organization or local AI testing. However, for mainstream gaming or heavy content creation, this processor will bottleneck performance. Choose the 135UL only if your primary goals are silence, continuous operation, and edge AI functionality rather than raw desktop performance or gaming frame rates.

Read the full review

Frequently Asked Questions

Do Intel Core i5-1235U and Intel Core Ultra 5 135UL use the same socket?

No. They use different sockets (Intel Core i5-1235U: Intel BGA 1744, Intel Core Ultra 5 135UL: Intel Socket 1851), so each needs a compatible motherboard.

Which has more cores?

The Intel Core Ultra 5 135UL has the most cores. Core counts: Intel Core i5-1235U (10 cores), Intel Core Ultra 5 135UL (12 cores).