Sapphire Toxic RX 6900 XT goes Extreme thanks to the selected GPU

Sapphire Nitro Radeon RX 6800 XT Re... x
Sapphire Nitro Radeon RX 6800 XT Review

Sapphire Toxic RX 6900 XT goes Extreme thanks to the selected GPU

Sapphire relaunches: after Toxic, here is Toxic Extreme. The new video card shows a difference compared to the model already presented: on board we find Navi 21 XTXH, a highly selected GPU to allow these models for overclockers and enthusiasts to touch frequencies hitherto precluded (such as the 3.2 GHz touched by der8auer).

The Toxic Extreme if presented with maximum boost clock of 2730 MHz, 70 MHz more compared to Toxic, which can be reached by activating the Toxic Boost mode from the TriXX software. The Game Clock in this setting rises to 2500 MHz, an increase of 100 MHz. The memory frequency should rise to 2135 MHz as in the standard solution, but there is no certainty about this. On the site, Sapphire talks about a Game Clock up to 2375 MHz and a Boost Clock up to 2525 MHz, probably referring to the Performance BIOS: the card has two BIOSes, one Performance and one Silent.

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The Toxic Extreme project does not change compared to the already known model and we find with an air-liquid “hybrid” cooling system. The liquid part serves to cool the GPU, and is connected to a 360 mm radiator with three 120 mm fans. According to Sapphire, this solution “keeps the GPU temperature below 85 ° C and the noise below 36 dBA”.

The air part instead serves to cool the other components on the PCB, from the VRM to the memory: there are dedicated radiators and heatpipes, as well as a hybrid fan that “combines the advantages of axial and blower fans”: silence and strong pressure to channel the air downwards, i.e. towards the printed circuit, to ensure optimal cooling without compromising noise.

Obviously, a heatsink cover with LED ARGB, but also logo and blackplate are illuminated, not forgetting the fans on the radiator. Sapphire TriXX software allows you to customize the lighting between various modes, but the board also features a 3-pin connector for synchronizing with the motherboard lighting.

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As for the power section on the PCB, the board has a total of 16 VRM phases, 14 of which are dedicated to the GPU and two to the VRAM. Connection to the power supply is via two 8-pin and one 6-pin PCIe connectors. The company talks about a demand of around 430W and therefore needs at least an 850W PSU. Four video outputs, one HDMI 2.1 and three DisplayPort 1.4 complete the picture.