Review Asus Zenbook S 14 UX5406
Asus Zenbook S 14 UX5406 · Core Ultra 7 258V · Arc 140V · 120Hz OLED
Intel Core Ultra 7 258V · Intel Arc Graphics 140V · 32GB LPDDR5x-8533 (onboard) · 1TB SSD (WD SN560) · 14″ 2880×1800 OLED 120Hz glossy · 1.179 kg
Slim and stable case –
very fast iGPU,
great 120-Hz OLED display,
very good system performance,
quiet operation, even under load,
Thunderbolt 4, USB-A & Wi-Fi 7,
comfortable keyboard,
good sound system,
excellent battery life.
RAM can't be upgraded,
PWM flickering,
no SD card reader,
comparatively low multi-core performance.
A great allrounder with a fast GPU and quiet fans – one of the best 14-inch ultrabooks.
Display – 14″ OLED · 2880×1800 · 120Hz · 100% sRGB · 99% P3
Panel: ATNA40CU09-0 – 14″ 2880×1800, OLED, glossy, 120Hz, HDR.
| Specification | Value |
|---|---|
| Brightness (centre) | ~381 cd/m² (SDR), 615 cd/m² (HDR) |
| Contrast | ∞:1 (OLED) |
| sRGB coverage | 100% |
| AdobeRGB coverage | 89.2% |
| Display P3 coverage | 99% |
| Response time (B/W) | 0.71 ms |
| Response time (grey) | 0.7 ms |
| PWM | 480 Hz (detected) |
| Finish | Glossy |
- Excellent color accuracy and coverage (P3, sRGB)
- Very fast response times (OLED)
- PWM flickering at 480 Hz (though amplitude is low)
- Glossy – reflections outside
Panel FRU: ATNA40CU09-0 (14″ 2880×1800 OLED, 120Hz, glossy)
ICC profile available – calibrated ΔE 1.0
PWM at 480 Hz – most users won't notice, but some may be sensitive.
Processor – Intel Core Ultra 7 258V · 8c/8t · Lunar Lake
- Model: Intel Core Ultra 7 258V – 4× Lion Cove P-core + 4× Skymont E-core
- Boost: 4.8 GHz (P-core) / 3.7 GHz (E-core)
- TDP: 37 W PL2 / 17 W PL1 (sustained)
- Cinebench R23 Multi: ~9,114 pts
- Excellent single-core performance, multi-core lags behind competitors
CPU FRU: Intel Core Ultra 7 258V (Lunar Lake, soldered BGA)
Graphics – Intel Arc Graphics 140V · Xe2 · fastest iGPU
- Model: Intel Arc Graphics 140V – 8 Xe2 cores, up to 1.95 GHz
- 3DMark Time Spy: ~3,857 pts (Standard mode) / ~4,118 (Full Speed)
- Cyberpunk 2077 (FHD Ultra): ~24.3 fps (Standard) / ~25.9 (Full Speed)
- Very fast iGPU, beats Radeon 890M in some tests
| Benchmark | Score (Standard) |
|---|---|
| 3DMark Time Spy | 3,857 |
| 3DMark Fire Strike | 8,243 |
| 3DMark 11 Performance | 10,811 |
| Cyberpunk 2077 (FHD Ultra) | ~24.3 fps |
GPU FRU: Intel Arc Graphics 140V (integrated, Xe2)
Memory – 32GB LPDDR5x-8533 · onboard · not upgradeable
- Capacity: 32 GB LPDDR5x-8533 (dual-channel, onboard)
- Soldered – not upgradeable
RAM soldered – cannot be upgraded.
RAM FRU: LPDDR5x-8533 (onboard) – not replaceable
Storage – 1TB WD SN560 · PCIe 4.0 · M.2 2280 slot
- Drive: WD PC SN560 SDDPNQE-1T00 – 1 TB, PCIe 4.0
- Seq. read: ~4,982 MB/s
- Seq. write: ~3,366 MB/s
- M.2 2280 format, replaceable
SSD FRU: WD PC SN560 SDDPNQE-1T00 (1 TB, M.2 2280, PCIe 4.0)
Battery – ~14.3 hours · 72 Wh
- Capacity: 72 Wh
- WiFi surfing (150 nits, 60 Hz): ~14.3 hours
- Excellent battery life – among the best in class
Battery FRU: 72 Wh (internal) – user-replaceable
AC Adapter FRU: 65W USB-C (Asus)
Chassis & Connectivity – Ceraluminum · Wi-Fi 7 · 2× Thunderbolt 4 · HDMI · USB-A
- Materials: Ceraluminum (ceramic + aluminum) – scratch-resistant, premium feel
- Weight: 1.179 kg (2.6 lbs) – very light
- Dimensions: 310 × 215 × 13 mm
- Left: HDMI 2.1, 2× USB-C Thunderbolt 4 (PD, DP)
- Right: USB-A 3.2 Gen 2
- 2× Thunderbolt 4
- Wi-Fi 7 (BE201)
- No SD card reader
WLAN FRU: Intel BE201 (Wi-Fi 7) – soldered (not replaceable)
Serviceability – SSD replaceable · RAM & Wi-Fi soldered
| Component | Replaceable? | Notes |
|---|---|---|
| SSD | ✅ Yes | M.2 2280 – replaceable |
| RAM | ❌ No | Soldered – not upgradeable |
| Wi-Fi | ❌ No | Soldered – not replaceable |
| Battery | ✅ Yes | User-replaceable |
| Keyboard | ❌ No | Built-in, not user-replaceable |
| CPU/GPU | ❌ No | Soldered BGA |
RAM and Wi-Fi soldered – cannot be upgraded or replaced.
SSD and battery are user-replaceable.
Components FRU / Model Numbers
| Component | FRU / Model |
|---|---|
| CPU | Intel Core Ultra 7 258V (Lunar Lake, soldered) |
| GPU | Intel Arc Graphics 140V (integrated, Xe2) |
| RAM | LPDDR5x-8533 (32GB, onboard) – not upgradeable |
| SSD | WD PC SN560 SDDPNQE-1T00 (1 TB, M.2 2280, PCIe 4.0) |
| Display Panel | ATNA40CU09-0 (14″ 2880×1800 OLED, 120Hz, glossy) |
| WLAN | Intel BE201 (Wi-Fi 7) – soldered |
| Battery | 72 Wh (internal) |
| AC Adapter | 65W USB-C (Asus) |
Procurement & Reseller Recommendations
CPUUltra 7 258V – fast single-core
RAM32GB soldered – not upgradeable
GPUArc 140V – fastest iGPU
DisplayOLED 120Hz, P3 – excellent
Battery14.3h – outstanding
Value~$1,500 – premium
Key Selling Points vs. Competitors
Strengths
- Slim and stable case
- Very fast iGPU
- Great 120-Hz OLED display
- Very good system performance
- Quiet operation, even under load
- Thunderbolt 4, USB-A & Wi-Fi 7
- Comfortable keyboard
- Good sound system
- Excellent battery life
Weaknesses
- RAM can't be upgraded
- PWM flickering
- No SD card reader
- Comparatively low multi-core performance
Pro tip for resellers & repair professionals:
• Highlight OLED display (120Hz, P3 coverage) and fast iGPU – key selling points.
• Excellent battery life and quiet fans – great for mobile users.
• RAM and Wi-Fi are soldered – warn customers about upgrade limitations.
• PWM at 480 Hz – mention for sensitive users.
• Multi-core performance lags behind competitors – but sufficient for most tasks.
• Great all-rounder for everyday use and light gaming – one of the best ultrabooks.
• Highlight OLED display (120Hz, P3 coverage) and fast iGPU – key selling points.
• Excellent battery life and quiet fans – great for mobile users.
• RAM and Wi-Fi are soldered – warn customers about upgrade limitations.
• PWM at 480 Hz – mention for sensitive users.
• Multi-core performance lags behind competitors – but sufficient for most tasks.
• Great all-rounder for everyday use and light gaming – one of the best ultrabooks.