The information comes from a fellow hack, Igor Wallossek from Igor's Lab, detailing a total board power (TBP) for both the reference and custom Navi 21 XT-based RX 6000 series cards, as well as the Navi 21 XL-based one.

According to Igor's sources, the total TBP of the reference Navi 21 XT-based card is 320W, with GPU pulling 235W. The sheet also confirms that AMD is using 16Gbps GDDR6 memory and that AMD AIB partners might go for higher voltages, pushing the GPU TDP to 270W, raising the total TBP to 355W.

Igor also got some info on the Navi 21 XL GPU variant, which should pull 203W for the GPU, or 290W as a TBP.

There is also some information about the RX 6000 series availability. While some cards might be available from early November, according to our source, first custom cards should be available in mid- to end of November, which lines up with Igor's information.