Credit: CyberPunkCat / Twitter AMD's Navi 21 GPU is widely used in the Big Navi family. Currently, there are four variants of the Navi 21 die if we don't take professional models into consideration. Navi 21 XL and Navi 21 XT are the basis, respectively, of the Radeon RX 6800 and Radeon RX 6800 X, while Navi 21 XTX equips the standard Radeon RX 6900 XT and, finally, the Navi 21 XTXH gives life to higher category models , like PowerColor's Radeon RX 6900 XT Red Devil Ultimate.
The Radeon RX 6900 XTX will most likely use the Navi 21 XTXH GPU, which is the fastest of the lot. On this occasion, the graphics card will not only be equipped with improved clock speeds, but presumably faster memory as well. The slide states that the Radeon RX 6900 XTX delivers FP32 performance up to 24.93 TFLOP, an 8% increase over the regular Radeon RX 6900 XT. Assuming the amount of Stream Processor doesn't change, the Radeon RX 6900 XTX should debut with a 2.435MHz boost clock. While the regular Radeon RX 6900 XT is equipped with 16Gb / s GDDR6 memory, the Radeon RX 6900 XTX should be equipped with 18Gb / s memory, with a maximum bandwidth of 576GB / s. Therefore, the Radeon RX 6900 XTX offers up to 13% more throughput.
The performance of the Radeon RX 6900 XT was already very close to the GeForce RTX 3090. With the new makeover, the Radeon RX 6900 XTX does not it should have trouble beating the GeForce RTX 3090 (at least without activating the Ray Tracing effects), but we will have to wait until we have it in our hands to find out.