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Eclipse Gray gaming laptop with 16 inch 2.5K 240Hz OLED display

ASUS

ASUS ROG Zephyrus G16 GU605CX 16" 2.5K 240Hz OLED Ultra 9-285H RTX 5090 32 GB LPDDR5X 16 TB

SKU CH-K4MD-SMKZM

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

  • ColorEclipse Gray
  • Operating SystemWindows 11 Home
  • CPUIntel® Core Ultra 9-285H
  • Screen16" 2.5K
  • Memory32GB
  • Storage16 TB M.2 PCIe 4.0 x4 NVMe SSD
  • 5K 240Hz OLED delivers smooth 2560 x 1600 visuals
  • Intel Core Ultra 9 285H hits 5.4 GHz turbo across 16 cores
  • RTX 5090 with 24 GB GDDR7 powers demanding creative and gaming workloads
  • 32 GB LPDDR5X at 7467 MT/s keeps multitasking responsive
  • 16 TB NVMe storage in dual 8 TB drives loads games and projects fast

16-inch 2.5K 240Hz OLED Gaming Laptop

The ASUS ROG Zephyrus G16 GU605CX is a 16-inch gaming laptop built around a 2.5K 240Hz OLED panel. It targets enthusiasts who want a high-refresh display in a thin chassis. The system ships with Windows 11 Home installed.

OLED panel limits peak sustained brightness

The 16.0-inch WQXGA OLED runs at 2560 x 1600 with a 240Hz refresh rate. OLED technology delivers per-pixel contrast and fast response, though sustained full-screen brightness is lower than LCD alternatives. The 0.59 to 0.65-inch profile restricts cooling headroom for the 5.4 GHz turbo processor.

24 GB GDDR7 video memory decides 4K capability

The GeForce RTX 5090 mobile GPU includes 24 GB of GDDR7 memory. That frame-buffer size determines whether the laptop can hold 4K textures and large scenes without swapping to system RAM. The 32 GB LPDDR5X at 7467 MT/s and 16 TB of PCIe 4.0 x4 NVMe storage support the GPU but do not replace its dedicated memory.

Highlights

  • 5K 240Hz OLED delivers smooth 2560 x 1600 visuals
  • Intel Core Ultra 9 285H hits 5.4 GHz turbo across 16 cores
  • RTX 5090 with 24 GB GDDR7 powers demanding creative and gaming workloads
  • 32 GB LPDDR5X at 7467 MT/s keeps multitasking responsive
  • 16 TB NVMe storage in dual 8 TB drives loads games and projects fast

Specifications

BrandASUS
SeriesROG Zephyrus G16
ModelGU605CX-G16.U9X5090
Part NumberGU605CX-G16.U9X5090-HID6
ColorEclipse Gray
Operating SystemWindows 11 Home
CPUIntel® Core Ultra 9-285H
Screen16" 2.5K
Memory32GB
Storage16 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
Turbo FrequencyMax Turbo Frequency 5.4 GHz
CPU L3 Cache24 MB
Screen Size16.0"
TouchscreenNo
Display Type2.5K
Resolution2560 x 1600
Bezel Design100% DCI-P3
Display Features2.5K WQXGA 240Hz OLED
GPU/VPUGeForce RTX 5090 Laptop GPU
Graphic TypeDedicated Card
SSD16TB
HDDNo
Storage Spec2 x 8 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
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
Thunderbolt 3240Hz
ThunderboltWi-Fi 7
HDMI1x HDMI 2.1 FRL
Ethernet1x Thunderbolt™ 4 support DisplayPort™ / power delivery
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
Virtual Reality ReadyArrow Lake
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

Questions about this item

Which storage capacity should I choose for the Zephyrus G16 GU605CX?

This unit ships with 16 TB total — two 8 TB M.2 PCIe 4.0 x4 NVMe SSDs — so there is no capacity option to select at purchase.

What does the 240 Hz OLED panel deliver in daily use?

The 16 inch 2.5K 240 Hz OLED screen refreshes each frame every 4.2 ms, giving smooth motion in fast games and deep contrast for media.

What does the PCIe 4.0 x4 interface cap in practice?

The x4 link limits each 8 TB drive to the PCIe 4.0 maximum throughput, so sequential speeds top out at the Gen 4 ceiling.

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