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Grey aluminium gaming laptop, 16 inch OLED display, slim profile

ASUS

ASUS ROG Zephyrus G16 GU605CX Grey 16" 2.5K 240Hz OLED Ultra 9 285H RTX 5090 32GB 4TB

SKU CH-QK9T-K5MHV

A 16-inch 2.5K 240Hz OLED gaming laptop with an Intel Core Ultra 9 285H processor, RTX 5090 graphics, 32GB LPDDR5X memory and a 4TB NVMe SSD

  • ColorEclipse Gray
  • Operating SystemWindows 11 Pro
  • CPUIntel® Core Ultra 9-285H
  • Screen16" 2.5K
  • Memory32GB
  • Storage4 TB M.2 PCIe 4.0 x4 NVMe SSD

Color Eclipse Gray

Operating System Windows 11 Pro

GPU|Memory|SSD GeForce RTX 5090 Laptop GPU|32GB|4 TB

  • 5K 240Hz OLED display delivers vivid motion at 2560 x 1600
  • Ultra 9 285H 16-core processor reaches 5.4 GHz turbo for heavy workloads
  • RTX 5090 with 24 GB GDDR7 powers high-frame-rate gaming and creative tasks
  • 32 GB LPDDR5X 7467 memory runs demanding apps and multitasking smoothly
  • 4 TB PCIe 4.0 NVMe SSD provides fast boot and load times for large libraries

Compact 16" OLED Gaming Laptop

The ASUS ROG Zephyrus G16 GU605CX packs a 16-inch 2.5K 240Hz OLED panel into a chassis measuring 13.94 by 9.69 by 0.59 to 0.65 inches and weighing 4.08 lbs. It runs on an Intel Core Ultra 9 285H 16-core processor with a 5.4 GHz max turbo and an NVIDIA GeForce RTX 5090 GPU with 24 GB GDDR7. Windows 11 Pro is pre-installed.

For Mobile Power Users, Not Desktop Replacements

This suits creators and gamers who need a colour-accurate 2560 x 1600 OLED screen and high frame rates in a thin 16-inch form factor. The 32 GB LPDDR5X memory is soldered, so buyers who want user-upgradable RAM should look elsewhere. The 4 TB PCIe 4.0 x4 NVMe SSD offers ample fast storage for large project libraries.

Build-Ready With Premium Thermal Prep

The system arrives with Gelid GC Extreme on the GPU and Conductonaut on the CPU already applied, reducing the need for immediate repasting. Dual-channel LPDDR5X at 7467 MT/s feeds the CPU and integrated graphics without extra modules. A single M.2 slot holds the 4 TB drive; expansion depends on that slot’s availability. The 240 Hz OLED panel drives high-refresh gaming without an external monitor.

Highlights

  • 5K 240Hz OLED display delivers vivid motion at 2560 x 1600
  • Ultra 9 285H 16-core processor reaches 5.4 GHz turbo for heavy workloads
  • RTX 5090 with 24 GB GDDR7 powers high-frame-rate gaming and creative tasks
  • 32 GB LPDDR5X 7467 memory runs demanding apps and multitasking smoothly
  • 4 TB PCIe 4.0 NVMe SSD provides fast boot and load times for large libraries

Specifications

BrandASUS
SeriesROG Zephyrus G16
ModelGU605CX-G16.U9X5090
Part NumberGU605CX-G16.U9X5090-HID2P
ColorEclipse Gray
Operating SystemWindows 11 Pro
CPUIntel® Core Ultra 9-285H
Screen16" 2.5K
Memory32GB
Storage4 TB M.2 PCIe 4.0 x4 NVMe SSD
Graphics CardNVIDIA® GeForce® RTX™ 5090
Video Memory24GB
Dimensions (W x D x H)13.94" x 9.69" x 0.59" ~ 0.65"
Weight4.08 lbs
CPU TypeIntel Core Ultra 9 (Series 2)
Processor NameIntel Core Ultra 9 285H
Number of Cores16-core (8P+8E) Processor
Core NameArrow Lake
Turbo FrequencyMax Turbo Frequency 5.4 GHz
CPU L3 Cache24 MB
Screen Size16.0"
TouchscreenNo
Display Type2.5K
Resolution2560 x 1600
Refresh Rate240Hz
Display Features2.5K WQXGA 240Hz OLED
GPU/VPUGeForce RTX 5090 Laptop GPU
Graphic TypeDedicated Card
SSD4TB
HDDNo
Storage Spec4 TB M.2 PCIe 4.0 x4 NVMe SSD
Memory SpeedLPDDR5X 7467
Memory Spec32 GB onboard
Max Memory Supported32GB
WLANWi-Fi 7(802.11be) (Triple band) 2*2
WiFi GenerationWi-Fi 7
BluetoothBluetooth® 5.4
USB2x USB 3.2 Gen 2 Type-A, 1x USB 3.2 Gen 2 Type-C support DisplayPort™ / power delivery / G-SYNC
Thunderbolt1x Thunderbolt™ 4 support DisplayPort™ / power delivery
HDMI1x HDMI 2.1 FRL
Audio Ports3.5mm Combo Audio Jack
AudioSmart Amp Technology, Dolby Atmos, AI noise-canceling technology, Hi-Res certification (for headphone), Built-in 3-microphone array
Speaker4-speaker (dual-force woofer) system with Smart Amplifier Technology, 2 Tweeters
TouchpadYes
KeyboardBacklit Chiclet Keyboard 1-Zone RGB
Backlit KeyboardBacklit
Webcam1080P FHD IR Camera for Windows Hello
Card ReaderSD (UHS-II, 312MB/s)
StyleThin and Light
TypeGaming & Entertainment
UsageConsumer
AC Adapter/ChargerRectangle Conn, 240W AC Adapter, Output: 20V DC, 12A, 240W, Input: 100~240C AC 50/60Hz universal
Battery90WHrs, 4S1P, 4-cell Li-ion

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the laptop need an external power adapter to run the RTX 5090 and Ultra 9 285H at full speed?

Yes, the 240 W power adapter included with the GU605CX supplies the 5090 and the 285H with the power they need for 5.4 GHz turbo and 24 GB GDDR7 operation.

Can I keep using my existing PCIe 3.0 NVMe drive alongside the 4 TB PCIe 4.0 SSD that comes installed?

The chassis provides a second M.2 slot that accepts PCIe 3.0 or 4.0 NVMe drives, so your current drive can stay as extra storage.

How do I verify the 240 Hz OLED panel is actually running at 240 Hz after setup?

Open Windows Settings > System > Display > Advanced display and confirm the refresh rate dropdown shows 240 Hz for the 2560 x 1600 panel.

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