Today, we have specifications of AMD’s next-Generation graphics cards thanks to the latest update of the AMD Radeon Open Compute ecosystem (ROCm 3.8). The data was pieced together by a Redditor stblr.

The top-of-the-range silicon, Navi 21 with the name of Sienna Cichlid, but more popularly known as Big Navi, would be the AMD Radeon RX 6900 XT will have 80 Compute Units, which translates to 5120 Stream Processors. This graphics chip was seen in a Navi21A variant for macOS11 at a frequency of 2050 MHz, while another variant, Navi 21B reaches 2200 MHz. In this way, the Navi 21B silicon would have a performance around 22.5 FP32 TFLOPs, while the GeForce RTX 3080 moves around 29.8 TFLOPs. Its consumption would be around 200-238W (vs 320W RTX 3080).

AMD Radeon RX 6700 XT
AMD Radeon RX 6700 XT

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The Navi 22 Silicon, Navy Fluder features 2560 Stream processors. This silicon would reach a maximum speed of 2500 MHz, and is expected to be the AMD Radeon RX 6700 XT, since the Radeon RX 5700 XT has the same number of cores. This graphic silicon would have a consumption around 170W.

Finally, the Navi 23, Dimgrey Cavefish, which with 2048 Stream Processors would be the AMD Radeon RX 6700. Neither its frequencies nor consumption was revealed.

AMD RDNA GPU Cores
Navi 10 Navi 14 Navi 21 Navi 22 Navi 23 Navi 31
Compute Units
40
24
80
40
32
80
GPU Clock
1400 MHz
1900 MHz
2050-2200 MHz
2500 MHz
 – –
Power Limit
180W
110W
200-238W
170W
 – –

 

Finally, the firmware also listed the first RDNA3 silicon, the Navi 31, the successor to Big Navi and has the same 80 Compute Units as the Navi 21 / Big Navi / RX 6900 XT silicon, if each CU contains 64 cores, then it would also feature 5120 Stream processors, so AMD would choose the option of gradually improving the microarchitecture in terms of power, consumption and frequency escalation instead of increasing the number of cores exponentially.

 

 

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