The Sapphire Toxic Radeon RX 6900 XT air cooled is an overclocked professional gaming card. Sapphire has reintroduced their popular Toxic line of graphics cards after a hiatus of 5-6 years. The Toxic is also available water cooled. The MSRP is $1999.99.

  • 11308-11-20G
  • RDNA 2
  • Navi 21
  • Codename: Sienna Cichlid
  • TSMC 7nm
  • 80 CU
  • 5120 Stream Processors
  • 128 ROPS, 320 TMUs,
  • 80 RT cores
  • 24.83 TFLOPS
  • 16GB 256-bit GDDR6 @ 2000 GB/s
  • Boost Clock Boost Clock: Up to 2365 MHz
  • One Click TOXIC BOOST Up to 2425 MHz
  • 1 x HDMI 2.1 and 3 x DisplayPort 1.4
  • DX12 ultimate supported
  • PCI Express 4.0
  • TOXIC Air Cooled Tri-X Cooling Technology
  • 12.60″ x 5.31″ triple slot
  • Adjustable support bracket
  • 400W TDP
  • dual 8-pin PCIe cables and one 6-pin PCIe cable required

Best best for the Sapphire Toxic radeon RX 6900 XT air cooled is an 850W or better power supply that has enough current to handle the demands. Some versions of the RX 6900 XT actually want triple 8-pin PCIe cables. The Sapphire card uses 11 yellow power cables which can handle at least 55A of current equalling 660W. The design completely eliminates the need for slot power. The max power draw favors 1000W or even 1200W power supplies. The AX1600i can handle dual cards easily.

The Sapphire Toxic radeon RX 6900 XT comes with an adjustable bracket for those who want to support the card more strongly. Generally even 3 slot cards can be held in place with the rear bracket and the slot clip. Mostly brackets are seen in machines with class side panels.

While Sapphire’s Nitro and Pulse series are fantastic custom designs, enthusiasts should be more excited about the Toxic Extreme Edition series Radeon RX 6000 series graphics cards. The custom designs have been made purely for overclockers and enthusiasts with premium materials and absolutely phenomenal cooling designs. The Tri-X cooling use dual ball bearing fans for extraordinary service and fans are easily replaced. Sapphire has long used the double bearing cooling fans which is standard in the industry. The triple slot design is now becoming more common with 250W class cards and above. The longer cards need a mid or full ATX tower to accommodated the 13″ lengths.

The RX 6900 XT is a 16GB card which does best with at least 32GB of system RAM along with motherboard for advanced video memory management. Upcoming DDR5 systems are capable of even more RAM which makes the 16GB VRAM fit in easily with the expanded memory space. DDR5 is poised to offer 64GB, 128GB and even 256GB to consumers over the next few years.

With the Full Monty of 80 CU the Sapphire Toxic radeon RX 6900 XT is the top bin achieving 24.83 TFLOPS which far more than the consoles. The Xbox Series X has 52 CU at a lower clock speed. The PS5 only has 36 CU but the clock speeds are higher. The RX 6900 XT can handle easily handle contemporary remastered games.

GPU-Z only manages to tell half the story for the Sapphire Toxic radeon RX 6900 XT. Booting Windows was not really improved but once the desktop was presented the performance gains are easily noticed. The card uses AMD Smart Memory Access which makes the entire VRAM all work together which allows Windows 11 to better take advantage of modern hardware. The available 16GB of VRAM is as much as the entire RAM in a console so this card gives the PC gamer a leg up on consoles but then again given the cost his has to be expected.

Sapphire Toxic radeon RX 6900 XT is plenty powerful to handle modern remastered games have been released alongside the Xbox Series X|S. The RX 6900 XT is AMD’s top shelf card which is read for the action in games. The card will likely to be in use for at least 3 years to amortize the capital cost.

Card Name:AMD Radeon RX 6900 XT
Owner:AnonymousSubmitted:Dec 21st, 2021 15:38
GPU:Navi 21Revision:C0
Technology:7 nmDie Size:519 mm²
BIOS Version: ID:1002 – 73BF
Bus Interface:PCIe x16 4.0 @ x16 4.0Subvendor:Sapphire (1DA2 – 440F)
ROPs / TMUs:127 / 320Shaders:5120 (DX 12 (12_2))
Pixel Fillrate:302.7 GPixel/sTexture Fillrate:756.8 GTexel/s
Memory Type:GDDR6Bus Width:256 bit
Memory Size:16384 MBBandwidth:512.0 GB/s
Driver:30.0.13025.5005 (Adrenalin 21.10.2) DCH / Win11 64
GPU Clock:2135 MHzGPU Default:2135 MHz
GPU Boost:2365 MHzGPU Boost Default:2365 MHz
Memory Clock:2000 MHzMemory Default:2000 MHz
GPU Overclock:0%Mem Overclock:0%


The performance of the Sapphire Toxic Radeon RX 6900 XT is over 24 TFLOPS thanks to the 11% overclocking. Sapphire is well known for offering better grade video cards to the enthusiast market and this card does not disappoint. The 16GB of VRAM allows games to load more assets for quicker transitions from map to map.

The RX 6900 XT matches the X570 for PCIe 4.0 support so the performance of the card is perfectly tuned. With the full 16 lanes available the aggregate bandwidth from main memory to the GPU can run at the maximum 2000 GB/s speed of the VRAM easily.

The performance of the Sapphire Toxic Radeon RX 6900 XT is almost beyond compare. Even the RTX Titan cannot come close to the performance leaving only a few extreme cards that are as powerful Only the RTX 3090 is competitive but that card is hard to find even at $3500. Sapphire has a card that is gaming first, the mining performance is actually relatively poor. HDMI 2.1 can support 144Hz panels. HDMI 2.1 supports 10-bit, 12-bit and 16-bit (RGB or YCbCr) color depths. 


Combine an AMD Ryzen 5000 Series processor or a select AMD Ryzen 3000 Series processor with an AMD Radeon RX 6000 Series graphics card to boost your system’s performance, thanks to AMD Smart Access Memory technology. AMD Smart Access Memory enables AMD Ryzen processors to harness the full potential of the graphics card memory. Enjoy increased performance with all-AMD in your system for the ultimate gaming advantage.

In conventional Windows-based PC systems, processors can only access a fraction of graphics memory (VRAM) at once, limiting system performance. With AMD Smart Access Memory, the data channel gets expanded to harness the full potential of GPU memory, utilizing the bandwidth of PCI Express to remove the bottlenecks and increase performance.

smart access memory enabled screen

There’s no extra cost on AMD’s side, and marketing claims it can boost performance by up to 16% in some titles. Most games at 2560×1440 can expect 8-14% better performance and at 3840×2160 it’s slightly better. Some older games may not be able to leverage the advantages effectively. The AMD Smart Access Memory is more applicable for new games looking forward. The new Unreal 5.0 engine should support Smart Access Memory.

AMD’s Radeon RX 6000 will also support the DirectStorage API, which reduces game load times, and it’s possible that explosive latency-reducing storage tech could benefit from the Smart Memory Access feature, too, giving AMD yet another advantage. But we’ll have to wait to learn more details.

Keep in mind AMD, Intel, and NVIDIA are working hard to bring versions of all these features to PC gamers no matter the mix of hardware they’re using, and the near future may look wildly different in terms of what GPUs and CPUs can and cannot do together. PC gamers are a motley crew at the best of time with a staggering range of components. Hardware designs have changed many times making it even more complicated.


The AMD Gaming Super Resolution (GSR) replaces the previous FidelityFX Super Resolution (FSR) branding. This technology is one of the most anticipated features of the year by all AMD users, as it allows doubling, tripling, and even quadrupling the FPS of a game without affecting the graphics quality of the game. GSR will make 3840×2160 gaming a real treasure for those who have a good LCD.