NVIDIA

ASUS ROG Strix OC GeForce RTX 4090

Expert rating9 / 10

GPU Brand:: NVIDIA
Series:: GeForce RTX 40
Board Partner:: ASUS
VRAM:: 24 GB
Memory Type:: GDDR6X
Boost Clock:: 2640 MHz
Card Length:: 358 mm
Slot Width:: 3.5

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Manufacturer: NVIDIA Last updated: 2026-09-12

ASUS ROG Strix OC GeForce RTX 4090 Review

ASUS ROG Strix OC GeForce RTX 4090 is a flagship NVIDIA graphics card built on the Ada Lovelace (AD102) architecture, with 24GB of GDDR6X memory, a 2640MHz boost clock, and a 450W TDP. It is Ada Lovelace's flagship, long the fastest consumer gaming GPU on the market.

If you're shopping for a flagship card, the ASUS ROG Strix OC GeForce RTX 4090 lines up against AMD's Radeon RX 7900 XTX in this catalog. Expect a card around 358mm long needing a 3.5-slot opening in your case, with cuda cores count of 16384 feeding its rendering pipeline. Launch MSRP was $1,599, though street pricing has moved since.

Performance and Architecture

Built on NVIDIA's Ada Lovelace (AD102) architecture, the ASUS ROG Strix OC GeForce RTX 4090 pairs 16384 cuda cores with 24GB of GDDR6X memory on what ASUS rates as a 2640MHz boost clock. That combination places it in the flagship tier, where it's tuned for a specific resolution and refresh-rate target rather than being a universal do-everything card.

Power, Size, and Compatibility

At a 450W TDP, the ASUS ROG Strix OC GeForce RTX 4090 needs a power supply with enough headroom on the 12V rail plus whatever PCIe power connectors this variant uses. Physically it runs about 358mm long and occupies a 3.5-slot opening, so measure your case's GPU clearance and front intake fans before buying, especially in compact builds.

Comparison to Alternatives

The closest rival to the ASUS ROG Strix OC GeForce RTX 4090 in this catalog is AMD's Radeon RX 7900 XTX, which competes at a similar price and resolution target. Shoppers who need more VRAM headroom or lower power draw than the ASUS ROG Strix OC GeForce RTX 4090 offers should cross-shop that card before deciding, since the two trade blows depending on the game engine and whether ray tracing or upscaling is in use.

Specifications

Platform

GPU Brand	NVIDIA
Board Partner	ASUS

Identity and type

Product Type	Desktop Add-In Card
Series	GeForce RTX 40
Tier	Flagship

Performance

VRAM	24 GB
Memory Type	GDDR6X
Boost Clock	2640 MHz
Ray Tracing Support	Yes

Physical & Power

Card Length	358 mm
Slot Width	3.5

Board and vendor

Factory Overclocked	Yes

Silicon

Architecture	Ada Lovelace
Shader Units	16384

Memory

Memory Bus Width	384 bit
Memory Bandwidth	1008 GB/s

Host interface

PCIe Generation	PCIe 4.0

Display and media

DisplayPort Version	DP 1.4a
DisplayPort Count	3
HDMI Version	HDMI 2.1a
HDMI Count	2

Market and workstation

MSRP	1599 USD

Source URL	https://rog.asus.com/graphics-cards/graphics-cards/rog-strix/rog-strix-rtx4090-o24g-gaming-model/spec/

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating9 / 10

A solid flagship pick if its price and 24GB VRAM allocation match your target resolution.

Best for

Gamers targeting the resolution this flagship tier is built for
Builders who want 24GB of VRAM without moving up a tier
Anyone upgrading from an older NVIDIA or rival card at a similar price point

Not for

Buyers who need the absolute best price-to-performance and should compare street prices first
4K/high-refresh gamers if this card's tier sits below High-End
SFF builders who haven't confirmed this card's length and slot width fit their case

FAQs

What are the key specifications of the ASUS ROG Strix OC GeForce RTX 4090?

The ASUS ROG Strix OC GeForce RTX 4090 is a graphics card from NVIDIA. Key specs: GPU Brand NVIDIA, Tier Flagship, Board Partner ASUS, VRAM (GB) 24GB GDDR6X, Memory Type GDDR6X.

Who is the ASUS ROG Strix OC GeForce RTX 4090 best suited to?

It suits gamers targeting the resolution this flagship tier is built for, builders who want 24gb of vram without moving up a tier, anyone upgrading from an older nvidia or rival card at a similar price point.

What are the drawbacks of the ASUS ROG Strix OC GeForce RTX 4090?

It is a poor fit for buyers who need the absolute best price-to-performance and should compare street prices first, 4k/high-refresh gamers if this card's tier sits below high-end, sff builders who haven't confirmed this card's length and slot width fit their case.