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Triple-fan graphics card in dark finish with angular shroud and backplate

XFX Refurbished

XFX RX-66XT8TBDQ SPEEDSTER MERC308 Radeon RX 6600 XT graphics card

SKU CH-0X99-J3D10 MPN RX-66XT8TBDQ

Refurbished AMD Radeon graphics card with 8 GB GDDR6 memory, 2048 stream processors, boost clock of 2607 MHz, triple-fan cooler, HDMI 2.1 and three DisplayPort 1.4 outputs

  • Graphics processorRadeon RX 6600 XT
  • Memory capacity8 GB
  • Interface typePCI Express 4.0
  • Shader units2048
  • Boost frequency2607 MHz
  • Type of memoryGDDR6
  • 8GB GDDR6 memory delivers smooth 1080p and 1440p gaming
  • Boost clock reaches 2607 MHz for higher frame rates in demanding titles
  • PCI Express 4.0 interface provides full bandwidth on modern motherboards
  • Triple-fan cooler keeps thermals in check during extended sessions
  • HDMI 2.1 and three DisplayPort 1.4 outputs support multi-monitor and high-refresh setups

SPEEDSTER MERC308 Radeon RX 6600 XT

The XFX SPEEDSTER MERC308 Radeon RX 6600 XT is a refurbished graphics card built on AMD RDNA 2 architecture. It delivers 2048 stream processors and 8GB of GDDR6 memory across a 128-bit interface. The card targets 1080p gaming with high refresh rates and supports DirectX 12 Ultimate. A triple-fan cooler manages thermals within a 2.5-slot form factor.

PCI Express 4.0 8GB GDDR6 upgrade

Moving from an older 4GB or 6GB card to this 8GB model removes a common texture bottleneck in modern titles. The PCI Express 4.0 interface doubles bandwidth over 3.0 when paired with a compatible platform. The jump is worth it when your current GPU hits its memory limit before its compute limit. A 750W power supply and one 8-pin connector are required.

2607 MHz boost under sustained load

The boost clock reaches 2607 MHz while the triple-fan array maintains airflow across the 274 mm board length. Clock stability holds better than blower-style coolers during extended sessions. Power draw stays within the 8-pin connector rating without throttling. Frame pacing remains consistent in DirectX 12 Ultimate workloads.

How it compares

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

Price $123.99
Cheaper than about 88% of the 4,285 comparable items (median $354.99).
Memory capacity 8 GB
Typical for this category: the median of 3,563 items is 8 GB.
Boost frequency 2607 MHz
Higher than about 80% of the 1,837 comparable items (median 1.89 GHz).

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Specifications

Product
Brand nameXFX
Product lineSPEEDSTER MERC308
Model nameRX-66XT8TBDQ
Memory
Type of memoryGDDR6
Graphics
Graphics processorRadeon RX 6600 XT
Memory capacity8 GB
Boost frequency2607 MHz
Shader units2048
Core frequency2188 MHz
Chipset makerAMD
Graphics seriesAMD Radeon RX 6000 Series
Effective memory speed16 Gbit/s
Memory bus width128-Bit
DirectX support12 Ultimate
VR readyYes
Ports & slots
Interface typePCI Express 4.0
HDMI ports1 x HDMI 2.1
DisplayPort connectors3 x DisplayPort 1.4
Power
Recommended power supply750 W
Power input connector1 × 8-Pin
Size & build
Max graphics card length274 mm
Card size10.79 in × 4.49 in
Slots occupied2.5 Slot
Shipping weight1.34 kg
Package size362 × 198 × 120 mm
More details
Cooling solutionTriple Fans

Questions about this item

What case clearance does the 274 mm long card with a 2.5 slot width need?

The board measures 274 mm in length and occupies 2.5 slots, so the chassis must provide at least that much length and vertical space.

Which power connector must be attached during installation, and what PSU rating is recommended?

Connect the single 8-pin power plug and use a power supply rated for at least 750 W.

How should the triple-fan cooler be maintained over time?

Periodically remove dust from the three fans and heatsink fins with compressed air to keep airflow unrestricted.

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