Review ASUS ZenBook 14 OLED UX3405CA, Ultra 7 255H
Asus ZenBook 14 OLED · Core Ultra 7 255H
Intel Core Ultra 7 255H · Intel Arc Graphics 140T · 16GB LPDDR5 · 1TB SSD (Samsung PM9C1) · 14″ 1920×1200 OLED 60Hz · 1.288 kg
Premium lightweight chassis – excellent OLED display, strong battery life (~15h),
Wi-Fi 7 and Thunderbolt, better CPU/GPU than AMD model.
Soldered RAM, high latencies, SSD throttles under heat,
weight closer to 1.3kg than 1.2kg.
The better ZenBook 14 this year – but AMD version has better SSD cooling.
Display – 14″ OLED · 1920×1200 · 60Hz · 100% sRGB · 99.7% P3
Panel: ATNA40CT02-0 – 14″ 1920×1200, OLED, glossy, 60Hz, touch, pen support.
| Specification | Value |
|---|---|
| Brightness (centre) | ~372 cd/m² |
| Contrast | ∞:1 (OLED) |
| sRGB coverage | 100% |
| AdobeRGB coverage | 96.9% |
| Display P3 coverage | 99.7% |
| Response time (B/W) | 2.0 ms |
| Response time (grey) | 1.6 ms |
| PWM | 480 Hz (below 85% brightness) |
| Finish | Glossy |
- Excellent color accuracy (ΔE < 2)
- Wide color gamut (99.7% P3)
- Very fast response times
- 60Hz only – 120Hz option available on higher-end config
Panel FRU: ATNA40CT02-0 (14″ 1920×1200 OLED, 60Hz, glossy, touch)
Processor – Intel Core Ultra 7 255H · 16c/16t · Arrow Lake-H
- Model: Intel Core Ultra 7 255H – 6× P-Core, 8× E-Core, 2× LP-E-Core
- Boost: 5.1 GHz (P-core)
- TDP: 60 W PL2 / 60 W PL1 (sustained)
- Cinebench R23 Multi: ~17,434 pts
- Better than AMD Ryzen AI 7 350
- Performance drops significantly over time in sustained loads
CPU FRU: Intel Core Ultra 7 255H (Arrow Lake-H, soldered BGA)
Graphics – Intel Arc Graphics 140T · ~26% faster than Radeon 860M
- Model: Intel Arc Graphics 140T – 8 cores (128 CUs)
- 3DMark Time Spy: ~3,484 pts
- Cyberpunk 2077 (FHD Ultra): ~20.7 fps
- Casual gaming at low-medium settings
| Benchmark | Score |
|---|---|
| 3DMark Time Spy | 3,484 |
| 3DMark Fire Strike | 7,609 |
| 3DMark 11 Performance | 12,228 |
| Cyberpunk 2077 (FHD Ultra) | ~20.7 fps |
| Baldur's Gate 3 (FHD Ultra) | ~22.5 fps |
GPU FRU: Intel Arc Graphics 140T (integrated, soldered)
Memory – 16GB LPDDR5 · Soldered
- Capacity: 16 GB LPDDR5 (soldered)
- Not upgradeable
RAM is soldered – no upgrades possible.
RAM FRU: LPDDR5 16GB (soldered, no replacement)
Storage – 1TB Samsung PM9C1 · M.2 2280 · upgradeable, but throttles
- Drive: Samsung PM9C1 MZVL81T0HELB-00BTW – 1 TB, PCIe 4.0
- SSD throttles under heat – AMD version has better cooling
- M.2 2280 slot – upgradeable
SSD performance drops under sustained load – thermal throttling.
SSD FRU: Samsung PM9C1 MZVL81T0HELB-00BTW (1 TB, M.2 2280, PCIe 4.0)
Battery – ~15.5 hours · 75 Wh
- Capacity: 75 Wh
- WiFi surfing: ~15.5 hours
- Excellent battery life
Battery FRU: 75 Wh (internal) – serviceable
AC Adapter FRU: 65W USB-C
Chassis & Connectivity – Premium metal · 2× Thunderbolt 4 · Wi-Fi 7
- Materials: Premium metal chassis
- Weight: 1.288 kg (closer to 1.3kg than 1.2kg advertised)
- Dimensions: 312.4 × 220.1 × 14.9 mm
- Left: USB-A (5 Gbps)
- Right: 2× Thunderbolt 4, 3.5mm audio, HDMI
- Thunderbolt 4 support
- Wi-Fi 7 (Intel BE201)
WLAN FRU: Intel BE201 (Wi-Fi 7) – M.2 2230, replaceable
Serviceability – RAM soldered · M.2 replaceable · limited upgradeability
| Component | Replaceable? | Notes |
|---|---|---|
| SSD | ✅ Yes | M.2 2280 – upgradeable |
| RAM | ❌ No | LPDDR5 soldered |
| Wi-Fi | ✅ Yes | M.2 2230 – replaceable |
| Battery | ⚠️ Limited | 75 Wh – internal but replaceable |
| CPU/GPU | ❌ No | Soldered BGA |
Bottom cover requires removing screws – relatively easy access.
Components FRU / Model Numbers
| Component | FRU / Model |
|---|---|
| CPU | Intel Core Ultra 7 255H (Arrow Lake-H, soldered) |
| GPU | Intel Arc Graphics 140T (integrated, soldered) |
| RAM | LPDDR5 16GB (soldered) |
| SSD | Samsung PM9C1 MZVL81T0HELB-00BTW (1 TB, M.2 2280, PCIe 4.0) |
| Display Panel | ATNA40CT02-0 (14″ 1920×1200 OLED, 60Hz, glossy, touch) |
| WLAN | Intel BE201 (Wi-Fi 7) – M.2 2230 |
| Battery | 75 Wh (internal) |
| AC Adapter | 65W USB-C |
Procurement & Reseller Recommendations
CPUUltra 7 255H – better than AMD
DisplayOLED – excellent colors
Battery~15.5h – great runtime
SSDThrottles – AMD version better
RAMSoldered – no upgrades
Value~€1600 – premium subnotebook
Key Selling Points vs. Competitors
Strengths
- Premium, lightweight chassis
- Good input devices
- Excellent OLED display with accurate colors
- Strong battery life
- Wi-Fi 7 and Thunderbolt support
- Better CPU/GPU performance than AMD model
Weaknesses
- Soldered RAM
- Currently high latencies
- Thermally throttling SSD
- Weight closer to 1.3kg than 1.2kg
- CPU performance drops significantly over time
Pro tip for resellers & repair professionals:
• Highlight the OLED display and battery life – key selling points.
• SSD throttles under heat – AMD version handles this better.
• RAM is soldered – configure with enough RAM upfront.
• High DPC latency – not ideal for real-time audio work.
• Thunderbolt 4 and Wi-Fi 7 – advantages over the AMD model.
• Highlight the OLED display and battery life – key selling points.
• SSD throttles under heat – AMD version handles this better.
• RAM is soldered – configure with enough RAM upfront.
• High DPC latency – not ideal for real-time audio work.
• Thunderbolt 4 and Wi-Fi 7 – advantages over the AMD model.