According to fresh rumours, AMD’s rDNA 3 based Navi 33 GPU which will power the next-gen Radeon RX 7000 series graphics cards will have fewer cores than what was expected. As we know, we had heard previous rumours which stated that AMD’s rDNA 3 Navi 33 GPU powering the Radeon RX 7000 series will have up to 5120 cores or 20 WGP’s however, now it seems that the core count is lower.
However, it’s also true that having a lower core count will in no way affect the performance of the device. Despite having a lower core count, the Navi 33 GPU will reportedly be offering a faster GPU performance than the Navi 21 GPU which is currently AMD’s flagship RDNA 2 chip for the high-end segment.
AMD RDNA 3 Navi 33 GPUs For Radeon RX 7700 Series
It’s expected to feature 2 Shader Engines and each Shader Engine has 2 Shader Arrays (2 per SE / 4 in total). It was previously expected that each Shader Array was composed of 5 WGPs (10 per SE / 20 total) and each WGP features 8 SIMD32 units with 32 ALUs (40 SIMD32 per SA / 80 per SE / 160 total).
However, according to the latest rumours, the RDNA 3 Navi 33 GPU will feature a total of 16 WGPs or 4096 cores.
That's true. N33=N23+GFX11.
— kopite7kimi (@kopite7kimi) September 29, 2021
AMD RDNA 3 Navi 3X GPU Configurations (Preliminary)
| GPU Name | Navi 21 | Navi 33 | Navi 32 | Navi 31 |
| GPU Process | 7nm | 6nm | 5nm/6nm | 5nm/6nm |
| GPU Package | Monolithic | Monolithic | MCM | MCM |
| Shader Engines | 4 | 2 | 4 (2 per GCD) | 6 (3 per GCD) |
| GPU WGPs | 40 | 20 | 40 (20 per GCD) | 60 (30 per GCD) |
| SPs Per WGP | 128 | 256 | 256 | 256 |
| Compute Units (Per Die) | 80 | 40 | 80 160 (Total) | 120 240 (Total) |
| Cores (Per Die) | 5120 | 5120 | 5120 | 7689 |
| Cores (Total) | 5120 | 5120 | 10240 | 15360 |
| Memory Bus | 256-bit | 128-bit | 192-bit | 256-bit |
| Memory Type | GDDR6 | GDDR6 | GDDR6 | GDDR6 |
| Infinity Cache | 128 MB | 256 MB | 384 MB | 512 MB |
| Flagship SKU | Radeon RX 6900 XTX | Radeon RX 7700 XT? | Radeon RX 7800 XT? | Radeon RX 7900 XT? |
| TBP | 330W | ~200W | ~300W | ~400W |
| Launch | Q4 2020 | Q4 2021? | Q4 2021? | Q4 2021? |
As we know, AMD is expected to launch its Navi 33 (RDNA 3) with 256 MB of Infinity Cache and each of the GPU will also feature 2 memory connect links (32-bit). That’s a total of 4 32-bit memory controllers for a 128-bit bus interface. This would bring the performance of the AMD Radeon RX 7600 series above the RX 6800 and RX 6900 series at a TDP of around 200W. The GPU is expected to be taped out soon & launch is expected around October 2022.
AMD RDNA Generational GPU Lineup
| Radeon Lineup | Radeon RX 5000 | Radeon RX 6000 | Radeon RX 7000 | Radeon RX 8000 |
| GPU Architecture | RDNA 1 | RDNA 2 | RDNA 3 / RDNA 2 | RDNA 4 |
| Process Node | 7nm | 7nm | 5nm/6nm? | 5nm/3nm? |
| GPU Family | Navi 1X | Navi 2X | Navi 3X | Navi 4X |
| Flagship GPU | N/A | Navi 21 (5120 SPs) | Navi 31 (15360 SPs) | Navi 41 |
| High-End GPU | Navi 10 (2560 SPs) | Navi 22 (2560 SPs) | Navi 32 (10240 SPs) | Navi 42 |
| Mid-Tier GPU | Navi 12 (2560 SPs) | Navi 23 (2048 SPs) | Navi 33 (5120 SPs) | Navi 43 |
| Entry-Tier GPU | Navi 14 (1536 SPs) | Navi 24 (1024 SPs) | Navi 34 (2560 SPs) | Navi 44 |
