ASUS ROG Strix SCAR 18
- CPU Model:
- Intel Core Ultra 9 290HX Plus
- GPU Model:
- NVIDIA GeForce RTX 5090 Laptop
- RAM Capacity:
- 64
- Display Size:
- 18
- Laptop Class:
- Desktop Replacement
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Manufacturer: ASUS Last updated: September 22, 2026
ASUS ROG Strix SCAR 18 (2026) G835LXG-TQ558X Review
The ASUS ROG Strix SCAR 18 (2026) pairs a 24-core Intel Core Ultra 9 290HX Plus with an RTX 5090 Laptop GPU (24GB, up to 175W), 64GB DDR5-6400 SO-DIMM RAM, and dual 4TB PCIe 5.0 NVMe SSDs in RAID 0 behind an 18-inch 4K 240Hz Mini LED display.
This is the flagship desktop-replacement configuration of ASUS's 2026 SCAR 18 line, built for buyers who want the fastest mobile GPU available paired with maximum RAM and storage headroom rather than portability; at 3.73kg with a 450W adapter it is not meant to travel light.
Desktop-Class Performance in a Chassis
24 CPU cores and an RTX 5090 Laptop GPU at up to 175W give this machine performance that rivals a desktop gaming rig, at the cost of a 3.73kg chassis and a 450W power brick.
Fully Upgradable Memory and Storage
Unlike many thin gaming laptops, the SCAR 18 uses SO-DIMM RAM (expandable to 128GB) and dual M.2 2280 PCIe 5.0 slots rather than soldering everything to the board.
Specifications
Identity and variant
| Brand | ASUS |
|---|---|
| Series | ROG Strix SCAR 18 |
| Series ID | rog-strix-scar-18-2026 |
| SKU Name | ROG Strix SCAR 18 (2026) G835LXG-TQ558X, RTX 5090 64GB 8TB |
| Chassis Code | G835 |
| Regulatory Model Code | G835LXG-TQ558X |
| Region Sold | Global |
Class and platform
| Laptop Class | Desktop Replacement |
|---|---|
| Release Year | 2026 |
| Operating System | Windows 11 Home |
| Weight | 3.73 kg |
Processor
| CPU Brand | Intel |
|---|---|
| CPU Model | Core Ultra 9 290HX Plus |
| CPU Cores | 24 |
| CPU Max Turbo Power | 160 W |
Sustained power
| Sustained Power Source | Not Measured |
|---|---|
| Power Adapter Wattage | 450 W |
Graphics
| GPU Brand | NVIDIA |
|---|---|
| GPU Model | GeForce RTX 5090 Laptop |
| VRAM | 24 GB |
| GPU Max Graphics Power | 175 W |
| Graphics Switching | MUX Switch |
Memory
| RAM Capacity | 64 GB |
|---|---|
| RAM Type | DDR5 |
| RAM Speed | 6400 MT/s |
| Memory Form Factor | SO-DIMM |
| Memory Soldered | No |
| Max RAM Supported | 128 GB |
Upgradability
| RAM Slots | 2 |
|---|---|
| RAM Slots Free | 0 |
| Storage Slots | 2 |
| Storage Slots Free | 0 |
| Storage Form Factor | M.2 2280 |
| Storage Interface | PCIe 5.0 x4 |
| SATA Bay Present | No |
Storage as shipped
| Storage Capacity | 8000 GB |
|---|---|
| Storage Type | NVMe SSD |
Display
| Display Size | 18 inches |
|---|---|
| Resolution Width | 3840 px |
| Resolution Height | 2400 px |
| Refresh Rate | 240 Hz |
| Panel Type | Mini LED |
| sRGB Coverage | 100 % |
| Touchscreen | No |
Battery and ports
| Battery Capacity | 90 Wh |
|---|---|
| Thunderbolt Support | Thunderbolt 5 |
| WiFi Standard | WiFi 7 |
Provenance
| Source URL | https://rog.asus.com/laptops/rog-strix/rog-strix-scar-18-2026/spec/ |
|---|
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Buyers wanting the fastest available mobile GPU for gaming or GPU-accelerated creative work
- Desktop-replacement setups where portability is not a priority
Not for
- Buyers prioritizing portability or battery life
- Budget-conscious buyers — this is a flagship-tier price point