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Macfixit Australia - Apple Mac RAM, SSD, iPad & iPhone Accessories

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Sonnet AMD Radeon 6900 XT (Compatible with Breakaway Box 750/750ex, DuoModo, 2019 Mac Pro, Windows PCs)

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In stock at supplier: Yes

Leaves warehouse within 4-5 weeks

Shipping cost is $9.90 (flat rate) for any size order.
This product is covered by an Australian Replacement Warranty.
30 Days Money Back Guarantee. Click here for more details.

Product code: SOGMP6900XT

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The AMD Radeon™ RX 6900 XT graphics card is one of the most powerful GPU cards ever.

Your price: $3,349.99

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 Mac Compatibility

  • Mac Pro 7,1 (2019) – 2.5x wide GPU card for slot 3 (&4)(1)
  • Mac (Intel®) with Thunderbolt 3 port plus Sonnet eGPU chassis
  • macOS 11.6+


Windows Compatibility

  • Windows 11 or 10 computer with 2.5 wide x16 PCIe slot


Thunderbolt Compatibility


Radeon RX 6900 XT Ports Compatibility

  • macOS 11.6
  • HDMI: 4K 60Hz
  • DisplayPorts: 5K 60Hz
  • USB-C Port: Not compatible
  • macOS 12
  • HDMI: 4K 60Hz
  • DisplayPorts: 5K 60Hz
  • USB-C Port: For USB-C and Thunderbolt displays(2) @5K 60Hz (See note 3 for eGPU peculiarity)
  • Windows 11 or 10
  • HDMI: 8K 60Hz, 4K 120Hz+ (with AMD FreeSync monitor)
  • DisplayPorts: 5K 60Hz, 4K 120Hz (with AMD FreeSync monitor), 8K 60Hz (using two DisplayPorts)
  • USB-C Port: 4K 60Hz in Windows PC or in eGPU chassis connected to Thunderbolt 4 computer port;  not compatible in eGPU chassis connected to Thunderbolt 3 computer port(2)




  • 2-year


Form Factor

  • Full-length, full-height, 2.5-card width PCIe card



  • 297(L) x 120(W) x 50(H) mm


Bus Interface

  • PCI Express 4.0 x16


Internal Connectors

  • Two 8-pin PCIe power connectors


External Connectors

  • One HDMI
  • Two DisplayPort
  • One USB-C



  • AMD Radeon RX 6900 XT by AMD Certified Global Add-in Board Partner
  • 7nm GPU
  • AMD RDNA 2 Architecture


Engine Clock

  • Engine Clock: Up to 2015 MHz
  • Boost Clock: Up to 2250 MHz


Stream Processors

  • 5120


Infinity Cache

  • 128 MB


Ray Accelerators

  • 80


Memory Size/Bus

  • 16 GB GDDR6


Memory Cock

  • 16 Gbps Effective


Memory Interface

  • 256-bit


Memory Bandwidth

  • Up to 512 GBps



  • Maximum 4 Displays



  • HDMI: 7680×4320
  • DisplayPort 1.4: 7680×4320
  • USB-C: 7680×4320


DirectX® Support

  • 12



  • PCI-Express 4.0


BIOS Support

  • UEFI


AMD Features(5)

  • AMD RDNA 2 Gaming Architecture
  • DirectX 12 Ultimate
  • Hardware Raytracing
  • AMD FreeSync Technology
  • DisplayPort 1.4 with DSC
  • HDMI 2.1 VRR
  • Video Streaming up to 8K
  • Radeon VR Ready Premium
  • AMD FidelityFX
  • Radeon Image Sharpening
  • Radeon Anti-Lag
  • Game Driver Optimizations
  • High Performance 4K Gaming



  • Three 90 mm fans


Zero RPM Fan Mode

  • Yes


Power Consumption

  • 360W

Additional Information

Colour No
Type No
Form Factor No
Connection DisplayPort, HDMI, USB-C
Suitable for No
Model Identifier No
Manufacturer Sonnet
Manufacturer P/N GPU-MP-6900XT
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Australian Owned Business 

Macfixit Australia is an Australian owned and operated business based in Melbourne, Victoria and we've been operating since 2005.

Fast Flat Rate Shipping on all orders

Shipping cost is $9.90 (flat rate) for any size order. Express Options are available in cart/checkout. All in-stock orders are shipped the same day if received by 10.30 AM (Eastern Time Victoria). Orders received after 11:00 AM are shipped the following business day.

100% Satisfaction Guaranteed 

We fully guarantee all of our products. If for some reason you are not happy with any item you purchase from us you may return it for a refund (see Return Policy). 

We do NOT sell or trade our customer information

Macfixit Australia respects your privacy. We never rent, sell or trade your contact information such as your name, address, phone# or e-mail address.

Convenient and Secure Shopping

All items on this website can be purchased safely online using our secure shopping cart. Security is provided by the best internet commerce technology available. We use Symantec Norton as our SSL (Secure Socket Layer) digital certificate provider, allowing our customers the strongest certificate services available. Our website is also scanned by McAfee Secure daily. Every McAfee SECURE certified site is tested and certified to be free of malware, viruses, phishing attacks.

Customer Reviews Gold Stars gold stars

We are part of the Google Trusted Store program for your security and verification of our service. Check out our Google Trusted Stores Reviews here.

Customer Service 

At Macfixit Australia) we’re 100% committed to serving our customers. We check phone and e-mail messages throughout the day and, in most cases we respond within minutes of receiving them. Please feel free to contact our Customer Service Department with any questions at 03 9329 4343 Mon-Fri, 10am to 5.30pm (Melbourme, Victoria Time), or e-mail us under this link.