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ASUS Dual Radeon RX 6600 XT graphics card with two axial fans and a protective backplate

ASUS

ASUS DUAL-RX6600XT-O8G Radeon RX 6600 XT graphics card

SKU CH-3QYJ-9CW9F MPN DUAL-RX6600XT-O8G

Refurbished Radeon RX 6600 XT graphics card with 8GB GDDR6 memory, 128-bit interface, PCI Express 4.0, dual fans, and boost clocks up to 2607 MHz

  • InterfacePCI Express 4.0
  • Chipset ManufacturerAMD
  • GPU SeriesAMD Radeon RX 6000 Series
  • GPURadeon RX 6600 XT
  • ArchitectureRDNA 2
  • Boost ClockOC mode: up to 2607 MHz Gaming mode: up to 2593 MHz
  • OC mode boosts GPU clock to 2607 MHz
  • 8GB GDDR6 memory at 16 Gbps on 128-bit bus
  • Axial-tech fans with dual ball bearings for longer life
  • PCI Express 4.0 interface with HDMI 2.1 and 3 x DisplayPort 1.4a
  • Auto-Extreme automation plus protective backplate improve reliability

Dual Radeon RX 6600 XT 8GB graphics card

The ASUS Dual Radeon RX 6600 XT equips a 128-Bit GDDR6 frame buffer with 8GB capacity and a boost clock up to 2607 MHz in OC mode. It targets 1080p gaming builds that want RDNA 2 architecture and DirectX 12 Ultimate support without a triple-slot cooler. The compact dual-fan design fits mid-tower cases while driving up to four displays via HDMI 2.1 and three DisplayPort 1.4a outputs.

PCI Express 4.0 interface and 500W PSU requirement

Verify that your motherboard provides a PCI Express 4.0 x16 slot and that the power supply delivers at least 500W with one free 8-pin connector. The card draws auxiliary power through a single 8-pin plug, so an adapter or split cable is not needed. Ensure the case offers enough length clearance for a dual-slot, dual-fan layout and that the rear bracket has two open expansion slots for the HDMI 2.1 and DisplayPort 1.4a connectors.

Sustained load behaviour with Axial-tech fans

Under extended gaming sessions the Axial-tech fan design spins longer blades inside a barrier ring to maintain downward air pressure across the heatsink. Dual ball fan bearings reduce friction wear compared with sleeve designs, helping the cooler sustain lower temperatures over hours rather than minutes. The metal backplate stiffens the PCB, limiting flex that can degrade thermal contact during prolonged high-frequency operation at 2593 MHz gaming clocks.

Highlights

  • OC mode boosts GPU clock to 2607 MHz
  • 8GB GDDR6 memory at 16 Gbps on 128-bit bus
  • Axial-tech fans with dual ball bearings for longer life
  • PCI Express 4.0 interface with HDMI 2.1 and 3 x DisplayPort 1.4a
  • Auto-Extreme automation plus protective backplate improve reliability

Specifications

BrandASUS
SeriesDual
ModelDUAL-RX6600XT-O8G
InterfacePCI Express 4.0
Chipset ManufacturerAMD
GPU SeriesAMD Radeon RX 6000 Series
GPURadeon RX 6600 XT
ArchitectureRDNA 2
Boost ClockOC mode: up to 2607 MHz
Gaming mode: up to 2593 MHz
Stream Processors2048
Effective Memory Clock16 Gbps
Memory Size8GB
Memory Interface128-Bit
Memory TypeGDDR6
DirectXDirectX 12 Ultimate
OpenGLOpenGL 4.6
Multi-Monitor Support4
HDMI1 x HDMI 2.1
DisplayPort3 x DisplayPort 1.4a
Max Resolution7680 x 4320
CrossFireX SupportCrossfire Support for DirecX 12 and Vulkan
Virtual Reality ReadyYes
CoolerDouble Fans
Recommended PSU Wattage500W
Power Connector1 x 8-pin
HDCP Ready2.3
FeaturesAxial-tech fan design features a smaller fan hub that facilitates longer blades and a barrier ring that increases downward air pressure.
Dual ball fan bearings can last up to twice as long as sleeve bearing designs.
Auto-Extreme Technology uses automation to enhance reliability.
A protective backplate prevents PCB flex and trace damage.
Form FactorATX
Max GPU Length243 mm
Card Dimensions (L x H)9.60" x 5.30"
Slot Width2.5 Slot
Shipping weight0.91 kg
Package size305 × 229 × 51 mm

Questions about this item

Does the ASUS DUAL-RX6600XT-O8G ship with any cables or adapters, or must I buy a separate 8-pin power cable?

The card is supplied as a standalone unit with its dual-fan cooler and protective backplate already fitted. A single 8-pin PCIe power connector from your PSU is required; no cables or adapters are included in the box.

Should I run the card in OC mode at 2607 MHz or Gaming mode at 2593 MHz for my build?

OC mode pushes the boost clock to 2607 MHz for maximum frame rates, while Gaming mode runs at 2593 MHz with a slightly quieter fan curve. Both modes use the same 2048 stream processors and 8 GB GDDR6 memory at 16 Gbps, so choose OC if thermals allow, otherwise Gaming.

What does the 16 Gbps effective memory clock mean for 1440p gaming on this 128-bit card?

The 16 Gbps GDDR6 memory feeds the 128-bit bus, delivering enough bandwidth for high-refresh 1440p play in most titles. The 8 GB frame buffer and 2048 stream processors handle modern textures, while the PCI Express 4.0 link keeps data moving to the CPU.

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