Angstronomics, a publication that covers the semiconductor industry, has shared what it claims are the final, “hard” specifications for AMD’s trio of upcoming RDNA 3 GPUs. They comprise the Navi 33, Navi 32, and Navi 31, a flagship that will seemingly boast 12,288 streaming processors, an exciting increase over what the Radeon RX 6900/6950 XT (5,120). But it also looks like the amount of Infinity Cache has been reduced, from 128 MB to 96 MB.
Navi 31
- gfx1100 (Plum Bonito)
- Chiplet – 1x GCD + 6x MCD (0-hi or 1-hi)
- 48 WGP (96 legacy CUs, 12288 ALUs)
- 6 Shader Engines / 12 Shader Arrays
- Infinity Cache 96MB (0-hi), 192MB (1-hi)
- 384-bit GDDR6
- GCD on TSMC N5, ~308 mm²
- MCD on TSMC N6, ~37.5 mm²
- World’s first chiplet GPU
- Main Navi 31 SKU will have 96 MB of Infinity Cache
- 3D stacked MCD also being productized (1-hi), but performance benefit is limited given the cost increase
- Cut-down SKU will offer 42 WGP and 5x MCD
- Reference card appears to have an updated 3-fan design
- Early plans for a version with 288 MB of Infinity Cache (2-hi) was shelved, as the cost-benefit was not worth it
Navi 32
- gfx1101 (Wheat Nas)
- Chiplet – 1x GCD + 4x MCD (0-hi)
- 30 WGP (60 legacy CUs, 7680 ALUs)
- 3 Shader Engines / 6 Shader Arrays
- Infinity Cache 64MB (0-hi)
- 256-bit GDDR6
- GCD on TSMC N5, ~200 mm²
- MCD on TSMC N6, ~37.5 mm²
- Coming in 2023
- Also coming to mobile as a high-end GPU offering in AMD Advantage laptops
- 128MB (1-hi) version exists but might not be productized due to costs
Navi 33
- gfx1102 (Hotpink Bonefish)
- Monolithic
- 16 WGP (32 legacy CUs, 4096 ALUs)
- 2 Shader Engines / 4 Shader Arrays
- Infinity Cache 32MB
- 128-bit GDDR6
- TSMC N6, ~203 mm²
- Mobile-first push for AMD
- Design is drop-in compatible with Navi23 PCBs, minimizing OEM board re-spin headaches
- Outperforms Intel’s top end Alchemist GPU while being less than half the cost to make and pulling less power
Angstronomics plans to share a follow-up article that will explain how AMD’s new RDNA 3 lineup will compare with NVIDIA’s Lovelace-based competitors.
The first Radeon RX 7000 Series graphics cards should be out later this year.
Source: Angstronomics