ASUS ROG Strix SCAR 18 (2025) G835LX / ASUS ROG Zephyrus G16 (2025) GU605CX

ASUS ROG Strix SCAR 18 (2025) G835LX: G835LX-SA129X variant: Intel Core Ultra 9 275HX, NVIDIA GeForce RTX 5090 Laptop GPU (24 GB), 64 GB DDR5 and 2 × 2 TB SSDs in RAID 0, Windows 11 Pro. The RTX 5080 G835LW and the 16-inch SCAR 16 are separate models; within the G835LX family memory, storage and operating system can differ by country.

ASUS ROG Zephyrus G16 (2025) GU605CX: GU605CX: the RTX 5090 Laptop GPU version; the GU605CX-QR111W and GU605CX-XS98 listed by ASUS come with 64 GB of memory and a 2 TB SSD. In the US, the GU605CX-G16.U9X5090 sold by Best Buy is listed with 32 GB. The same chassis is also sold with the RTX 5060/5070/5070 Ti/5080.

SpecificationASUS ROG Strix SCAR 18 (2025) G835LXASUS ROG Zephyrus G16 (2025) GU605CX
Release year20252025
ProcessorIntel Core Ultra 9 275HX (24 cores / 24 threads, up to 5.4 GHz, 36 MB cache, 13 TOPS NPU)

The cores are a mix of performance and efficiency cores; there is no Hyper-Threading, so core and thread counts are equal.

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Intel Core Ultra 9 285H; 16 cores, 16 threads; 2.9 GHz base, up to 5.4 GHz; 24 MB cache

The processor’s Intel AI Boost NPU delivers up to 13 TOPS of AI processing; some Windows AI features use this unit instead of the graphics card.

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GraphicsNVIDIA GeForce RTX 5090 Laptop GPU; 24 GB GDDR7; ROG Boost 1647 MHz; 175 W (150 W TGP + 25 W Dynamic Boost)

1647 MHz is the 1597 MHz boost clock plus a 50 MHz ASUS overclock. 175 W is the highest total graphics power; the 25 W Dynamic Boost share moves to the GPU when CPU load is low. The GPU is soldered and cannot be upgraded.

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NVIDIA GeForce RTX 5090 Laptop GPU, 24 GB GDDR7; ROG Boost 1647 MHz; 120 W (100 W + 20 W Dynamic Boost)

120 W is the upper power limit including Dynamic Boost: the extra 20 W is shifted to the GPU when the processor load is low and is not always available. The RTX 5070 Ti version of the same chassis is limited to 115 W, and the RTX 5060 and 5070 versions to 105 W.

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GPU switchingMUX Switch and NVIDIA Advanced Optimus

The MUX switch connects the internal display directly to the NVIDIA GPU to reduce latency in games; Advanced Optimus does this switch without a restart.

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Display18-inch ROG Nebula HDR Mini LED; 2560 × 1600 (16:10); 240 Hz; 100% DCI-P3; G-Sync; anti-glare low-reflection (AGLR) surface; Pantone Validated

The Mini LED backlight dims in many small zones independently, which keeps dark areas dark in HDR content; it is not as precise as pixel-level OLED control.

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16-inch 2.5K (2560 × 1600) OLED, 16:10, 240 Hz; 100% DCI-P3; G-Sync; Pantone Validated

240 Hz shows up to 240 frames per second in games; G-Sync matches the display refresh rate to the graphics card’s frame rate to prevent tearing. Pantone Validated means the display colours are verified against Pantone reference colours. ASUS does not give brightness or response time on this page.

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Memory64 GB (2 × 32 GB) DDR5-5600 SO-DIMM; 2 slots; up to 64 GB

Both slots are filled in this variant and ASUS’s stated maximum is already reached; an upgrade means replacing the modules.

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64 GB LPDDR5X-7467, soldered on board, dual channel; no memory slot

Memory cannot be upgraded later; the capacity chosen at purchase is permanent.

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Storage2 TB + 2 TB PCIe 4.0 NVMe M.2 SSD, RAID 0; 2 × M.2 slots

RAID 0 combines the two drives into one fast volume; if either drive fails all data can be lost, so regular backups matter. ASUS states that only single-sided SSDs are supported.

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2 TB M.2 NVMe PCIe 4.0 SSD; 2 × M.2 PCIe slots in total

The second M.2 slot allows an extra SSD. ASUS gives no separate PCIe generation for the free slot.

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Ports2 × Thunderbolt 5 (USB-C; DisplayPort, Power Delivery, G-SYNC); 3 × USB 3.2 Gen 2 Type-A; HDMI 2.1 FRL; 2.5G LAN; 3.5 mm combo audio jack

Thunderbolt 5 can offer up to 120 Gb/s in one direction, useful for fast external storage and high-resolution monitors. Independent testing criticised the lack of rear ports.

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1 × Thunderbolt 4 (40 Gbps, DisplayPort, power input); 1 × USB-C 10 Gbps (DisplayPort, power input, G-SYNC); 2 × USB-A 10 Gbps; HDMI 2.1 FRL; UHS-II SD card reader (312 MB/s); 3.5 mm audio

Both USB-C ports support an external display and charging; the 10 Gbps USB-C port also carries G-SYNC to an external display. ASUS does not state the USB-C charging power.

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WirelessWi-Fi 7 (802.11be, tri-band, 2 × 2); Bluetooth 5.4

A compatible router is needed to benefit from Wi-Fi 7 speeds.

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Wi-Fi 7 (802.11be), tri-band, 2×2; Bluetooth 5.4 ASUS
Keyboard and cameraPer-key RGB keyboard with numeric keypad and Copilot key; 1080p IR camera (Windows Hello) ASUS—
Audio4 speakers; Dolby Atmos; Hi-Res audio; AI noise cancelation ASUS2 tweeters and 4 speakers with dual force-cancelling woofers; Smart Amp; Dolby Atmos; 3-microphone array, AI noise cancelling

The force-cancelling woofer layout uses opposing drivers to reduce bass vibration passing into the chassis.

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Battery and power90 Wh 4-cell lithium-ion battery; 380 W adapter; plus a 100 W USB-C adapter

The 380 W adapter is needed for gaming performance; the 100 W USB-C adapter is for light use and charging on the go. ASUS notes that box contents can vary by region.

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Operating systemWindows 11 Pro ASUSWindows 11 Home or Windows 11 Pro (depending on SKU) ASUS
LightingAniMe Vision dot-matrix display on the lid; Aura Sync light bar ASUS—
Size and weight39.9 × 29.8 × 2.35–3.20 cm; 3.30 kg

The carried weight rises noticeably with the adapters.

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In the boxROG backpack, ROG Fusion II 300 headset, ROG Gladius III Mouse P514

ASUS notes that accessories can vary by region.

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Graphics switching—MUX Switch and NVIDIA Advanced Optimus

Advanced Optimus switches the internal display between the processor’s integrated graphics and the RTX 5090 without a restart. The MUX switch connects the display directly to the RTX 5090, removing the integrated graphics from the path in games.

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Display surface—Anti-glare, low-reflection coating (AGLR)

The coating is used to reduce reflections from lamps and windows in bright rooms.

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Battery and adapter—90 Wh, 4-cell lithium-ion; 240 W adapter (20 V, 12 A)

ASUS’s Middle East page also lists a 100 W USB-C adapter in the box and notes that the adapter can vary by region and model.

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Camera and keyboard—1080p FHD IR camera (Windows Hello); single-zone RGB backlit keyboard; Slash Lighting on the lid

The IR camera enables face sign-in with Windows Hello.

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Dimensions and weight—35.4 × 24.6 × 1.49–1.74 cm; 1.95 kg

The RTX 5060 and 5070 versions are 1.64 cm and 1.85 kg; the RTX 5070 Ti, 5080 and 5090 versions are 1.74 cm and 1.95 kg.

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