AMD Radeon RX 6900 XT 16GB

The Radeon RX 6900 XT was AMD's RDNA 2 flagship at launch in late 2020, a full 80 compute unit Navi 21 with 16 GB of GDDR6 and 128 MB of Infinity Cache holding a 256-bit bus at 512 GB/s. It is the same die and the same core count as the later RX 6950 XT, which differs only in memory speed and power budget. RDNA 2 has no matrix cores, so its 23.04 TFLOPS FP32 and 46.08 TFLOPS packed FP16 are the whole compute story: there is no BF16, FP8, INT8 or INT4 rate published, and nothing on the die that would make one interesting. The card matters to this catalog mainly as a 16 GB local inference option and as the reference point for how far a vector-only architecture sits below a tensor-core one.