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ASUS ROG Astral LC GeForce RTX 5090 liquid-cooled graphics card with silver metal shroud and integrated radiator

ASUS

ASUS ROG Astral LC GeForce RTX 5090 32GB GDDR7 OC Edition graphics card

SKU CH-16Q6-SGK99

Liquid-cooled GeForce RTX 5090 with 32 GB GDDR7, 21760 CUDA cores and PCIe 5.0 for 4K high-refresh gaming

  • Graphics processorGeForce RTX 5090
  • Memory capacity32 GB
  • Interface typePCI Express 5.0
  • CUDA core count21760
  • Highest resolution7680 × 4320
  • Boost frequency2437 MHz
  • 32 GB GDDR7 memory feeds 21 760 CUDA cores for heavy workloads
  • 28 Gbps effective memory clock moves data across a 512-bit bus
  • PCI Express 5.0 interface doubles link bandwidth over prior versions
  • DLSS 4.0 upscaling and frame generation lift frame rates in supported titles
  • 2 437 MHz boost clock sustains high frequency under load

ROG Astral LC RTX 5090 32GB

This graphics card pairs the NVIDIA GeForce RTX 5090 GPU with 32GB of GDDR7 memory on a 512-bit interface. It targets 4K and 8K gaming workloads as well as compute-heavy creative tasks. The board runs at a 2467 MHz game clock and a 2437 MHz boost clock across 21760 CUDA cores. PCI Express 5.0 provides the system link.

DLSS 4.0 and display outputs

DLSS 4.0 upscaling and frame generation are supported in compatible titles, raising frame rates without native resolution rendering. The rear bracket supplies two native HDMI 2.1b ports and three native DisplayPort 2.1a connectors. Up to four monitors can be driven simultaneously at a maximum resolution of 7680 x 4320. OpenGL 4.6 and VR readiness are also included.

Liquid-cooled installation notes

The card uses a closed-loop liquid cooler, so case clearance for the radiator and mounting points is required. Ensure the power supply delivers sufficient wattage and the correct PCIe connectors for the 5090 class. Route tubes without sharp bends to avoid flow restriction. Verify motherboard PCI Express 5.0 slot compatibility before fitting.

How it compares

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

Price $5,573.99
Pricier than about 95% of the 4,285 comparable items (median $354.99).
Memory capacity 32 GB
Higher than about 93% of the 3,563 comparable items (median 8 GB).
Boost frequency 2437 MHz
Higher than about 59% of the 1,837 comparable items (median 1.89 GHz).

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Specifications

Product
Brand nameASUS
Product lineROG Astral LC
Model nameROG-ASTRAL-LC RTX5090-O32G-GAMING
Processor
TDP rating575 W
Memory
Type of memoryGDDR7
Display
Highest resolution7680 × 4320
Graphics
Graphics processorGeForce RTX 5090
Memory capacity32 GB
Boost frequency2437 MHz
CUDA core count21760
Chipset makerNVIDIA
Graphics seriesNVIDIA GeForce RTX 50 Series
Game clock speed2467 MHz
Effective memory speed28000 MHz (28 Gbit/s)
Memory bus width512-Bit
OpenGL support4.6
Supported displays4
VR readyYes
Audio & video
HDCP supportYes
Ports & slots
Interface typePCI Express 5.0
HDMI ports2 x (Native)HDMI 2.1b
DisplayPort connectors3 x (Native)DisplayPort 2.1a
Power
Recommended power supply1000 W
Power input connector1 × 16-Pin
Size & build
Max graphics card length288.46 MM
Card size11.3 × 6 × 1.88 in
Slots occupied3.8 Slots
More details
Cooling solutionLiquid Cooler

Questions about this item

Will the 28 Gbps GDDR7 memory need active cooling maintenance later?

The memory runs at 28000 MHz on a 512-bit bus and is cooled by the factory-sealed liquid loop, which requires no user refilling or pump service.

Which limit appears first during sustained loads, the 2437 MHz boost clock or the power target?

The card boosts to 2437 MHz until the power limit or thermal ceiling is reached; typical sustained clocks settle below that peak once the liquid loop saturates.

How loud and hot does the liquid cooling get when the 21760 CUDA cores run all day?

The closed-loop radiator keeps core temperatures lower than air designs, and pump noise stays constant because fan speed scales with coolant temperature, not instantaneous load.

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