A user on r/AMD has shared alleged data pertaining to AMD’s Navi 22 or Navi 23 GPU, “Navy Flounder.” Following a bit of simple math, the parameters allude to a lower-ranged Radeon RX 6000 Series graphics card that features 40 Compute Units and 2560 stream processors. This happens to be a perfect match for AMD’s current flagship, the Radeon RX 5700 XT.
There’s a disparity in memory specifications, however. While the Radeon RX 5700 XT (and its Anniversary variant) sports a 256-bit memory interface, the Navy Flounder will supposedly swim with a lesser, 192-bit one.
“The number of CUs can be found by multiplying the first three values (so 40 for Navy Flounder),” stblr noted. “Another interesting value is gc_num_tccs, which is the number of texture channel caches and is generally related to the memory bus width (for Navy Flounder it would mean 192-bit), though there are exceptions.”
There are plenty of puzzle pieces missing, but we’d like to think that AMD’s RDNA 2 GPUs will offer surprising performance gains over the current lineup. The company will tell us a lot more during its Radeon event, which is slated for October 28.
| Parameter | Navi 10 | Navi 14 | Navi 12 | Sienna Cichlid | Navy Flounder |
|---|---|---|---|---|---|
| gc_num_se | 2 | 1 | 2 | 4 | 2 |
| gc_num_cu_per_sh | 10 | 12 | 10 | 10 | 10 |
| gc_num_sh_per_se | 2 | 2 | 2 | 2 | 2 |
| gc_num_rb_per_se | 8 | 8 | 8 | 4 | 4 |
| gc_num_tccs | 16 | 8 | 16 | 16 | 12 |
| gc_num_gprs | 1024 | 1024 | 1024 | 1024 | 1024 |
| gc_num_max_gs_thds | 32 | 32 | 32 | 32 | 32 |
| gc_gs_table_depth | 32 | 32 | 32 | 32 | 32 |
| gc_gsprim_buff_depth | 1792 | 1792 | 1792 | 1792 | 1792 |
| gc_double_offchip_lds_buffer | 1024 | 512 | 1024 | 1024 | 1024 |
| gc_wave_size | 32 | 32 | 32 | 32 | 32 |
| gc_max_waves_per_simd | 20 | 20 | 20 | 16 | 16 |
| gc_lds_size | 64 | 64 | 64 | 64 | 64 |
| num_sc_per_sh | 1 | 1 | 1 | 1 | 1 |
| num_packer_per_sc | 2 | 2 | 2 | 4 | 4 |