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Triple-fan graphics card with a 3.5-slot metal shroud and vented backplate

ASUS

ASUS ROG Strix GeForce RTX 4090 OC 24GB graphics card

SKU CH-28W3-VEJ8M

Delivers 24 GB GDDR6X on a 384-bit bus with boost clocks to 2640 MHz, triple Axial-tech fans and a 3.5-slot vapor-chamber cooler drawing 450 W

  • Graphics processorGeForce RTX 4090
  • Type of memoryGDDR6X
  • Interface typePCI Express 4.0
  • Highest resolution7680 × 4320
  • Boost frequency2640 MHz
  • TDP rating450 W
  • Boost clock of 2640 MHz delivers high frame rates
  • 24 GB GDDR6X on 384-bit bus handles large textures
  • Axial-tech fans give 23% more airflow for cooler runs
  • 5-slot vapor-chamber design moves heat away fast
  • HDMI 2.1 and DisplayPort 1.4a drive 7680 x 4320 displays

ROG GeForce RTX 4090 OC 24GB

The ASUS ROG GeForce RTX 4090 OC Edition is a high-end graphics card built for 4K gaming and intensive creative workloads. It features the NVIDIA Ada Lovelace architecture with 24GB of GDDR6X memory on a 384-bit interface. The factory overclock pushes the boost clock to 2640 MHz for maximum frame rates. A 3.5-slot cooler with a vapor chamber and three Axial-tech fans handles the 450W thermal design power.

PCIe 4.0 x16 interface limits

The card connects through a PCI Express 4.0 x16 slot, which provides sufficient bandwidth for the GPU and 24GB memory buffer. Display outputs consist of two HDMI 2.1 ports and three DisplayPort 1.4a connectors, supporting up to four simultaneous monitors at 7680 x 4320 resolution. The single 16-pin power connector draws up to 450W, so the motherboard slot and cable routing must accommodate the high current demand.

358mm length and 1000W PSU check

Verify that your case accepts a card length of 358mm and a 3.5-slot thickness of 70.1mm before ordering. A power supply of at least 1000W is recommended to sustain the 450W TDP alongside other system components. Ensure the PSU includes a native 16-pin connector or use the supplied adapter cable with two separate 8-pin cables. Confirm physical clearance for the included graphics card holder and cable bend radius.

How it compares

Measured against everything we stock in Desktop GPUs & Video Cards, at today’s prices. Recalculated every night.

Price $3,112.99
Pricier than about 92% of the 4,285 comparable items (median $354.99).
Boost frequency 2640 MHz
Higher than about 85% of the 1,837 comparable items (median 1.89 GHz).
Recommended power supply 1000 W
Higher than about 94% of the 2,103 comparable items (median 650 W).

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG-STRIX-RTX4090-O24G-GAMING
Processor
TDP rating450 W
Memory
Type of memoryGDDR6X
Display
Highest resolution7680 × 4320
Graphics
Graphics processorGeForce RTX 4090
Boost frequency2640 MHz
Chipset makerNVIDIA
Graphics seriesNVIDIA GeForce RTX 40 Series
Game clock speed2610 MHz
Memory bus width384-Bit
DirectX support12 Ultimate
OpenGL support4.6
Supported displays4
Audio & video
HDCP support2.3
Ports & slots
Interface typePCI Express 4.0
HDMI ports2 x HDMI 2.1
DisplayPort connectors3 x DisplayPort 1.4a
Power
Recommended power supply1000 W
Power input connector1 × 16-Pin
Size & build
Max graphics card length358 mm
Card size357.6 × 70.1 mm
Slots occupied3.5 Slot
In the box
In the box1 x Collection Card
1 x Speedsetup Manual
1 x Adapter Cable
1 x ROG Graphics Card Holder
1 x ROG Velcro Hook & Loop
1 x Thank you Card

Questions about this item

What does the 24GB GDDR6X capacity mean for my build?

The 24GB GDDR6X frame buffer on a 384-bit bus feeds the RTX 4090 GPU at high bandwidth, letting you run 4K or 8K textures, large 3D scenes and AI workloads without swapping to system memory.

How does the 2640 MHz boost clock behave once the card is installed?

The 2640 MHz boost clock is the peak frequency the GPU can reach under load; actual sustained clocks depend on your case airflow, power limit and the 450W TDP thermal headroom.

What does the PCI Express 4.0 interface cap in practice?

PCI Express 4.0 x16 provides up to 32 GB/s bandwidth; the card will also run in a PCIe 3.0 slot at half that throughput, which rarely limits gaming performance at 4K.

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