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AsusTechnical Specification MatrixAI Enhanced AnalysisAnalysis Date: 20 September 2026Evaluated at £725.06

Asus Chromebook CB5403CMA-QM0909

The Asus Chromebook CB5403CMA QM0909 is an executive-grade 14-inch ChromeOS laptop engineered for premium productivity. Featuring an Intel Core Ultra 5 115U processor with integrated AI Boost NPU, 16GB of LPDDR5x RAM, and a fast 256GB PCIe 4.0 NVMe SSD, it effortlessly handles demanding multi-tab workloads and cloud multitasking. Its standout 14-inch WQXGA (2560 x 1600) 16:10 touchscreen boasts a smooth 120Hz refresh rate, 500 nits brightness, and 100% DCI-P3 colour coverage, housed in a sleek 1.4 kg aluminium chassis with dual Thunderbolt 4 ports.

8.6/ 10
Andote Tech Score
Evaluated at £725.06
Price-Tier Avg: 8.2/10
Rated on 20 September 2026
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Relative Benchmark Scoring (1–10)

vs Price Tier Competitors
RAM Capacity16GB
Hardware Spec Score
7.5/10(Very Good)
Price-to-Value Efficiency
7.4/10(Very Good)
Storage Capacity256GB
Hardware Spec Score
7.5/10(Very Good)
Price-to-Value Efficiency
7.4/10(Very Good)
CPU Cores8
Hardware Spec Score
5.2/10(Average)
Price-to-Value Efficiency
5.1/10(Average)
Battery Capacity63 Wh
Hardware Spec Score
6.3/10(Above Average)
Price-to-Value Efficiency
6.3/10(Above Average)
Display Resolution2560MP
Hardware Spec Score
7.2/10(Very Good)
Price-to-Value Efficiency
7.1/10(Very Good)
Weight1400g
Hardware Spec Score
6.6/10(Above Average)
Price-to-Value Efficiency
6.5/10(Above Average)
How We Calculate This Score

Our objective rating combines Hardware Spec Quality (measuring real-world component power benchmarked across the entire category on a 1–10 scale) with a Price-to-Value Index (evaluating technical capability relative to selling price). User reviews and merchant sponsorships do not influence this score.

Score Deciding Factors8 Key drivers
✓Tier-1 Brand (Asus)
Premium manufacturer reliability & build qualityTier-1 Standing
•High-End Price Bracket£725
High-end product priced in the upper bracketPremium Tier
•Standard RAM Capacity16GB
Solid standard benchmark for category7.5/10
•Standard Storage Capacity256GB
Solid standard benchmark for category7.5/10
!Modest CPU Cores8.0
Entry-level benchmark rating limits overall score5.2/10
!Low Battery Capacity63 Wh
Entry-level benchmark rating limits overall score6.3/10
•Standard Display Resolution2560MP
Solid standard benchmark for category7.2/10
•Standard Weight1.40kg
Solid standard benchmark for category6.6/10
Key Technical Strengths
  • ✓Exceptional 14" WQXGA (2560x1600) 120Hz touchscreen with 500 nits and 100% DCI-P3
  • ✓Fast Intel Core Ultra 5 115U processor paired with 16GB LPDDR5x RAM and NVMe SSD
  • ✓Dual Thunderbolt 4 ports plus HDMI 2.1 and MicroSD expansion
  • ✓High-resolution 8MP front webcam with physical privacy shutter and fingerprint login
  • ✓Solid aluminium construction in a portable 1.4 kg chassis
Technical Limitations & Trade-offs
  • ✕Higher price tier compared to mainstream ChromeOS alternatives
  • ✕256GB storage capacity may require cloud storage for extensive local media libraries
  • ✕RAM is soldered on-board and not user-upgradable post-purchase

Official Product Documents & PDF Manuals

1 document available
Product Data Sheet
product_details

Complete Technical Specifications

Manufacturer-verified hardware specifications with contextual AI metric explanations.

What this metric means:

The 256GB PCIe 4.0 NVMe SSD delivers fast boot times and rapid local app loading compared to standard eMMC drives found in basic Chromebooks.

NVMeYes
M.2 SSD size2280 (22 x 80 mm)
SSD capacity256 GB
SSD interfacePCI Express 4.0
Storage mediaSSD
SSD form factorM.2
Optical drive typeNo
Total SSDs capacity256 GB
Card reader integratedYes
Total storage capacity256 GB
Compatible memory cardsMicroSD (TransFlash)
Number of SSDs installed1
What this metric means:

A 14-inch 2560x1600 touchscreen with a 120Hz refresh rate, 500 cd/m² brightness, and 100% DCI-P3 gamut delivers sharp text, accurate color rendering, and fluid motion, making it ideal for creative work and long reading sessions.

HD typeWQXGA
TouchscreenYes
Colour gamut100%
Display diagonal35.6 cm (14")
RGB colour spaceDCI-P3
Anti-glare screenYes
Display brightness500 cd/m²
Display resolution2560 x 1600 pixels
Native aspect ratio16:10
Maximum refresh rate120 Hz
Contrast ratio (typical)1500:1
What this metric means:

The Intel Core Ultra 5 115U (8 cores / 10 threads) with Intel AI Boost NPU provides high multi-threaded performance and dedicated hardware for on-device AI tasks. The 16GB LPDDR5x RAM ensures generous headroom for complex browser-based workflows.

Efficient cores4
Processor cache10 MB
Processor cores8
Processor model115U
Processor familyIntel Core Ultra 5
Performance cores2
Processor threads10
Maximum turbo power57 W
Processor base power15 W
Processor cache typeSmart Cache
Processor generationIntel® Core™ Ultra (Series 1)
Processor manufacturerIntel
Low Power Efficient-cores2
Processor boost frequency4.2 GHz
Efficient-core base frequency1 GHz
Performance-core base frequency1.5 GHz
Efficient-core Max Turbo Frequency3.5 GHz
Performance-core Max Turbo Frequency4.2 GHz
Low Power Efficient-core Base Frequency700 MHz
Low Power Efficient-core Max Turbo Frequency2.1 GHz
What this metric means:

The Intel Core Ultra 5 115U (8 cores / 10 threads) with Intel AI Boost NPU provides high multi-threaded performance and dedicated hardware for on-device AI tasks. The 16GB LPDDR5x RAM ensures generous headroom for complex browser-based workflows.

Internal memory16 GB
Memory form factorOn-board
Internal memory typeLPDDR5x-SDRAM
Maximum internal memory16 GB