Image: AMD

r/AMD’s stblr has shared the alleged number of Compute Units, core clocks, and other key specifications for red team’s next-generation RDNA 2 GPUs (i.e., Navi 21, Navi 22, Navi 23). If these figures are correct, AMD’s next flagship (Radeon RX 6900 XT?) could boast 80 Compute Units, which translates to 5,120 Stream Processors. That happens to be twice the amount of red team’s current champion, the Radeon RX 5700 XT.

Here’s a brief breakdown (via VideoCardz and Wccftech) of what “Big Navi” and its lesser siblings will seemingly offer. Despite their fishy code names, AMD’s Radeon RX 6000 Series GPUs may be the furthest things from a flop – especially when pricing and efficiency are considered.

Navi 21 (Sienna Cichlid): Flagship

  • 80 Compute Units
  • 5,120 Stream Processors
  • Boost clocks of up to 2,2200 MHz
  • 22.5 TFLOPs of compute

Navi 22 (Navy Flounder): Mid-Ranged

  • 40 Compute Units
  • 2,560 Stream Processors
  • Boost clocks of up to 2,500 MHz
  • 12.8 TFLOPS of compute

Navi 23 (Dimgrey Cavefish): Entry Level

  • 32 Compute Units
  • 2,048 Stream Processors

The GPU table (which we’ve copied directedly below) also references a new discovery: Navi 31. This is believed to be AMD’s first RDNA 3 GPU, which should provide an even greater performance-per-watt improvement. Being that its values echo Navi 21 (e.g., 80 CUs), this could be a refresh of some sort.

PropertyNavi 10Navi 14Navi 12Navi 21Navi 22Navi 23Navi 31
num_se2124224
num_cu_per_sh1012101010810
num_sh_per_se2222222
num_rb_per_se8884444
num_tccs168161612816
num_gprs1024102410241024102410241024
num_max_gs_thds32323232323232
gs_table_depth32323232323232
gsprim_buff_depth1792179217921792179217921792
parameter_cache_depth1024102410241024102410241024
double_offchip_lds_buffer1111111
wave_size32323232323232
max_waves_per_simd20202016161616
max_scratch_slots_per_cu32323232323232
lds_size64646464646464
num_sc_per_sh1111111
num_packer_per_sc2224444
num_gl2aN/AN/AN/A4224
unknown0N/AN/AN/A1010810
unknown1N/AN/AN/A1612816
unknown2N/AN/AN/A80403280
num_cus (computed)40244080403280

Additionally, there’s a second data set that provides insight on AMD’s upcoming “Van Gough” and “Rembrandt” APUs. While Van Gough will feature the same amount of Compute Units as its predecessors (8), Rembrandt will bump that specification up to 12. It also allegedly flaunts a PCIe 4.0 interface.

PropertyRenoirCezanneVan GoghRembrandt
num_se1111
num_cu_per_sh8886
num_sh_per_se1112
num_rb_per_se2224
num_tccs4444
num_gprs25625610241024
num_max_gs_thds32323232
gs_table_depth32323232
gsprim_buff_depth1792179217921792
parameter_cache_depth10241024512256
double_offchip_lds_buffer1111
wave_size64643232
max_waves_per_simd10101616
max_scratch_slots_per_cu32323232
lds_size64646464
num_sc_per_shN/A111
num_packer_per_scN/A224
num_gl2aN/AN/A44
unknown0N/AN/A86
unknown1N/AN/A44
unknown2N/AN/A812
num_cus (computed)88812

AMD will share more about the Radeon RX 6000 Series on October 28. If you haven’t gotten a look at red team’s new reference designs yet, you can check them out here and here.

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8 Comments

  1. Pretty cool, I had seen the 80 CU rumor going around for awhile now, but thought it seemed a little high and was more AMD fanboy wet dream than reality.

  2. [QUOTE=”Terminus, post: 19183, member: 204″]
    I’m interested, how many CU’s you think the cut down Navi 21 will have? 64 or maybe 70?
    [/QUOTE]
    As per redgamingtech’s source there are 4 versions of Navi 21
    I am guessing similar to 5700 series

    6900xtx – overclocked
    6900xt – full version
    6900 – cut down 1 (72?)
    6800xt – cut down 2 (???)

  3. [QUOTE=”Marees, post: 19192, member: 1536″]
    As per redgamingtech’s source there are 4 versions of Navi 21
    I am guessing similar to 5700 series

    6900xtx – overclocked
    6900xt – full version
    6900 – cut down 1 (72?)
    6800xt – cut down 2 (???)
    [/QUOTE]
    Nvidia like saturation..
    I guess that’s the way to do it, wonder how they will stagger releases?

  4. Looks like the 6900xt should be ~10% faster then a 3070 based on the tflops numbers (22 vs 20). If that number is somewhat accurate it should be a good card but I’d prefer to buy a 3080 for 4k gaming.

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