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XFX Speedster Merc 308 Radeon RX 6650 XT graphics card with triple fans and silver shroud

XFX Refurbished

XFX RX-665X8TBDY Radeon RX 6650 XT graphics card

SKU CH-ZR7D-06YKX MPN RX-665X8TBDY

Refurbished RDNA 2 GPU with 8GB GDDR6, 2048 stream processors and boost clock of 2694 MHz for 1440p gaming

  • Graphics processorRadeon RX 6650 XT
  • Memory capacity8 GB
  • Interface typePCI Express 4.0
  • Shader units2048
  • Highest resolution7680 × 4320
  • Boost frequency2694 MHz
  • 8 GB GDDR6 memory at 17.5 Gbps feeds high-resolution textures
  • Boost clock reaches 2694 MHz for strong 1440p frame rates
  • PCI Express 4.0 interface doubles bandwidth over 3.0
  • Triple-fan cooler keeps thermals in check under load
  • HDMI 2.1 plus three DisplayPort 1.4 outputs drive 8K displays

XFX Speedster Merc 308 Radeon RX 6650 XT 8GB

The XFX Speedster Merc 308 Radeon RX 6650 XT is a refurbished graphics card built on the RDNA 2 architecture for 1080p and 1440p gaming. It uses a PCI Express 4.0 interface and requires a motherboard with an x16 slot plus a 500 W power supply. The card targets players who want high frame rates in modern titles without moving to a larger GPU tier.

Sustained load behaviour with triple-fan cooler

Under extended load the Boost Clock of 2694 MHz and Game Clock of 2523 MHz are maintained by the triple-fan cooler design. The 8 GB GDDR6 frame buffer runs at 17.5 Gbps across a 128-Bit bus to feed the 2048 stream processors. DirectX 12 Ultimate support keeps the pipeline full during long sessions at up to 7680 x 4320 resolution.

Installation notes and common issues

Installation follows the standard PCI Express 4.0 x16 process with one 8-pin power connector typical for this board. The 1 x HDMI 2.1 and 3 x DisplayPort 1.4 outputs cover most monitor configurations. Builders must verify case length clearance for the triple-fan shroud and confirm the power supply delivers 500 W with the required cable. Supported operating systems include Linux and Windows 10/11 64-bit.

How it compares

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

Price $146.99
Cheaper than about 83% 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 2694 MHz
Higher than about 90% of the 1,837 comparable items (median 1.89 GHz).

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Specifications

Product
Brand nameXFX
Product lineSPEEDSTER MERC308
Model nameRX-665 × 8TBDY
Memory
Type of memoryGDDR6
Display
Highest resolution7680 × 4320
Graphics
Graphics processorRadeon RX 6650 XT
Memory capacity8 GB
Boost frequency2694 MHz
Shader units2048
Core frequency2192 MHz
Chipset makerAMD
Graphics seriesAMD Radeon RX 6000 Series
GPU architectureRDNA 2
Game clock speed2523 MHz
Effective memory speed17.5 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 supply500 W
Size & build
Max graphics card length274 mm
Card size10.79 in × 4.49 in
Slots occupied2.5 slot
Shipping weight1.29 kg
Package size360 × 193 × 93 mm
More details
Cooling solutionTriple Fans

Questions about this item

How loud and hot does the triple-fan SPEEDSTER MERC308 cooler run during all-day gaming sessions?

The triple-fan design on the SPEEDSTER MERC308 is built to move more air at lower RPMs, keeping the Radeon RX 6650 XT cooler and quieter than dual-fan models under sustained load.

What power supply and motherboard slot do I need before installing this card?

You need a minimum 500 W power supply with the required PCIe power connectors and a motherboard with a free PCI Express 4.0 x16 slot.

Will the 128-bit memory bus and PCI Express 4.0 interface bottleneck an older PCIe 3.0 system?

The card works in PCIe 3.0 slots at slightly reduced bandwidth; the 128-bit GDDR6 memory at 17.5 Gbps is unchanged, so real-world gaming impact is small at 1080p and 1440p.

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