AMD Flagship RDNA 3 Navi 31 GPU reportedly codenamed ‘Plum Bonito’ and uses ‘Gemini’ board, new generation RDNA 4 may land as ‘GFX1200’ series

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AMD may once again be using codenames that carry the fish name for its next-gen Navi 3X line powered by RDNA 3. The latest codenames seem to have been discovered by @Kepler_L2 on Twitter.

The AMD RDNA 3 Navi 31 GPU is codenamed “Plum Bonito” and uses the “Gemini” card

Beginning with the RDNA 2 lineup, AMD began using various fish names for its internal GPU naming scheme. The current generation flagship, the RDNA 2-based Navi 21 GPU, was codenamed “Sienna Cichlid” and it looks like the next-generation flagship, the RDNA 3-based Navi 31 GPU, will follow the tradition. and will be known as “Plum Bonito”. . Now Plum Bonito is not actually a fish but actually a fish dish. The Bonito fish wiki description reads:

AMD RDNA 3 flagship, Navi 31 GPU reportedly offers up to 384-bit bus and 24GB GDDR6 memory, Navi 32 gets 256-bit for up to 16GB memory

Skipjack are a tribe of medium-sized ray-finned predatory fish in the family Scombridae – a family it shares with the tribes of mackerel, tuna, and Spanish mackerel, as well as the king mackerel.

via Wikipedia

It is also said that AMD’s RDNA 3 powered Navi 31 GPU will be infused into the Gemini card and which is expected to be the reference card for the upcoming flagship.

Learning the code names of future GPUs is already fascinating. AMD is still going to use its star naming convention for the CDNA-X powered lineup while gaming RDNA GPUs are going to end up with more dodgy codenames. And on top of that, Kepler also seems to have noticed that the next-gen RDNA 4 range might belong to the “GFX1200” series. The RDNA 3 range has already been confirmed as “GFX1100” on Linux, while the RDNA 2 parts have been labeled as the “GFX1030” series. The first generation RDNA parts were referred to under the internal naming convention “GFX1010”.

Graphic architecture GPU code name Other name Architecture Product
GFX900 VEGA 10 GCN 5.0 RX VEGA / Radeon Pro
GFX902 RAVEN Raven Ridge/Picasso GCN 5.0 Ryzen 2000/3000 (G/GE)
GFX904 VEGA 12 GCN 5.0 Vega Pro 20 (MAC)
GFX906 VEGA 20 GCN 5.0 Radeon VII / Radeon Pro VII
GFX908 ARCTURUS DNAC 1 Instinct MI100
GFX90A Aldebaran DNAC 2 Instinct MI200
GFX909 CROW2 GCN 5.0 To confirm
GFX909 RENOIR GCN 5.0 Ryzen 4000 (H/U/G)
GFX1010 NAV 10 RDNA 1 RX5700/5600(M/XT)
GFX1011 NAV 12 RDNA 1 PRO 5600M (MAC)
GFX1012 BROWSING 14 RDNA 1 RX 5500 (M/XT)
GFX1030 NAV 21 Big Navi / Siena cichlid RDNA2 RX 6900/6800 series
GFX1031 NAV 22 navy flounder RDNA2 RX 6700 Series
GFX1032 SAILING 23 Dimgrey Cave Fish RDNA2 RX6600 series
GFX1033 NAV 24 beige goby RDNA2 RX 6500/6400 series
GFX1033 Van Gogh Aerith RDNA2 steam bridge
GFX1036 Raphael RDNA2 Ryzen 7000?
GFX1040 VAN GOGH LITE RDNA2 To confirm
GFX1100 Navi 31 Bonito with plums RDNA3 Radeon RX 7900?
GFX1101 Navi 3X RDNA3 Discrete GPU
GFX1102 Navi 3X RDNA3 Discrete GPU
GFX1103 Navi 3X Phoenix? RDNA3 Ryzen 7000 APU?
GFX1200 Navi4X RDNA4 Radeon RX 8000?

AMD RDNA 3 Navi 31 GPUs for Radeon RX 7900 Series

The AMD Navi 31 GPU, the flagship RDNA 3 chip, is said to power next-gen enthusiast cards such as the Radeon RX 7900 XT graphics card. We’ve heard that AMD will be ditching CUs (computing units) in favor of WGPs (workgroup processors) on its next-gen RDNA 3 GPUs. Each WGP will host two CUs (computing units) but with twice the SIMD32 clusters instead of only 2 on each CU in RDNA 2.

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Initially, the Navi 31 GPU configuration had two GCDs (Graphics Core Die) and a single MCD (Multi-Cache Die). Each GCD has 3 Shader Engines (6 total) and each Shader Engine has 2 Shader Arrays (2 per SE / 6 per GCD / 12 total). Each Shader Array consists of 5 WGPs (10 per SE / 30 per GCD / 60 total) and each WGP has 8 SIMD32 units with 32 ALUs (40 SIMD32 per SA / 80 per SE / 240 per GCD / 480 total). These SIMD32 units combine to make up 7,680 cores per GCD and 15,360 cores in total.

But this specification has since been toned down and according to the latest rumors, the AMD Navi 31 GPU with RDNA 3 architecture should now offer 48 WGP, 12 SA and 6 SE. This will give a total of 12,288 stream processors, which is lower than the previous number. It will also reduce overall compute performance unless AMD goes crazy with clock rates above 3.0 GHz on its flagship part.

The MCD Navi 31 (RDNA 3) will be linked to the dual GCD via a next-generation Infinity Fabric interconnect and will have 256-384 MB of Infinity cache. Each GPU must also have 4 memory connection links (32-bit). That’s a total of 8 32-bit memory controllers for a 256-bit bus interface.

There are also rumors of 3D stacking on the flagship Navi 31 GPU and the launch is currently expected in the second half of 2022.

Upcoming AMD, Intel, and NVIDIA GPU Specs (Preliminary)

GPU name AD102 Navi 31 Xe2-HPG
Code name Ada Lovelace RDNA3 battle mage
Flagship SKU GeForce RTX 4090 series Radeon RX 7900 series Arc B900 Series
GPU process TSMC4N TSMC 5nm+ TSMC 6nm 5nm TSCM?
GPU package Monolithic MCD (Multi-Chiplet Die) MCM (multi-chip module)
GPU dies Mono x 1 2x GCD + 4x MCD + 1x IOD Quad-Tile (tGPU)
Mega GPU clusters 12 GPCs (Graphics Processing Clusters) 6 shader engines 10 render slices
Super GPU clusters 72 TPC (Texture Processing Poles) 30 WGP (by MCD)
60 WGP (total)
40 Xe Cores (per tile)
160 Xe cores (total)
GPU clusters 144 stream multiprocessors (SM) 120 compute units (CU)
240 compute units (total)
1280 Xe VE (per tile)
5120 Xe VE (total)
Cores (per matrix) 18432 CUDA cores 7680 SP (by GCD)
15360 SP (Total)
20480 ALUs (total)
Rush Clock ~2.85GHz ~3.0GHz To be determined
Calculation FP32 ~105 TFLOPs ~92 TFLOPs To be determined
Memory Type GDDR6X GDDR6 GDDR6?
Memory capacity 24 GB 32 GB To be determined
Memory bus 384 bit 256 bit To be determined
Memory speeds ~21 Gbps ~18 Gbps To be determined
Cache subsystems 96 MB L2 cache 512 MB (Infinity Cache) To be determined
PAD ~600W ~500W To be determined
To throw Q4 2022 Q4 2022 2023

Which next-gen GPUs are you most looking forward to?

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