The Navi 21 XT GPU will reportedly be a powerhouse of a chip with a game clock of around 2.4 GHz which are the highest clock speeds we will get to see on a consumer desktop-grade graphics card. This also suggests that we can expect even higher boost frequencies considering the game & boost clocks are separate, as the game clock is the average clock frequency that the GPU can maintain in games while the boost clock is the peak frequency that the GPU can hit.
The GPU is also said to feature a TGP (Total Graphics Power) of 255W. This doesn't mean the whole board power but rather the GPU itself. The GeForce RTX 3080 for comparison has a TDP of 320W & the GeForce RTX 3070 has a TDP of 220W.
The graphics card based on the Navi 21 XT GPU, which is reportedly the Radeon RX 6900 XT, is said to feature 16 GB of GDDR6 memory which is also what we've seen in various previous leaks. As for comparative measurements, the performance looks to be really close to the NVIDIA GeForce RTX 3080 graphics card which is very impressive for AMD to hit, and if they can price the Big Navi graphics card right at around $499-$599 US, then they will have a killer 4K solution in their hands.
Rogame already pointed out at least four SKUs for the Navi 21 (RDNA 2) GPU but we did not know anything else aside from the PCI IDs. There's active speculation going on right now regarding exact specifications and configurations of each SKU in terms of core counts, texture mapping units, and ROPs since we now know that the GPU consists of 5120 stream processors packed within 80 CUs.
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