Soon enough we’ll be getting some new toys to play with
Angstromics has come to clear the air of all the rumors. It has outlined the likely final specs of the RX 7000 series cards.
The RDNA 3 lineup is likely to contain three discrete variants. With Navi 31, 32, and 33 outlined, the series will likely launch with the RX 7900 XT, RX 7800 XT, and RX 7800.
Along with the configuration, there are other factors that have been changed to improve the architecture. With plenty of optimizations to further improve the effectiveness of the cards.
RX 7000 series optimizations
Apart from smaller processes, there are other areas that have been improved to further the line. Firstly AMD Radeon is rearchitecting Compute Units and Graphics Pipeline.
These are mostly about removing the extra space on the dies. Creating the lowest area and cost per area. Much improved over RDNA 2 even with doubling ALUs.
Another feature of the graphics is OREO, the Opaque Random Export Order. This reorders the shaders to run in order, and not need another pipeline element down the line.
There is also an Infinity cache update. The Memory Attached Last Level (MALL) cache blocks have been halved in size. It doubles the number of backs and reduces the penalty of going to VRAM with higher bandwidth.
Angstromics points out this configuration was done in 2019 and finalized in 2020 and has not changed since.
The biggest change for the lineup is the use of its chiplet tech. As seen in the Ryzen 7 5800X3D, utilizing TSMC’s fanout tech lowers costs and the 3D stacked MCD double the infinity cache but does cost extra.
There is also a reported change in reference card design. Although keeping with the three fan design, it is going slightly taller, for higher TDPs. It also comes with a distinctive three-red stripe accent on the heatsink near the dual 8-pin connectors.
With that in mind, we bring you what to expect from the three graphics cards. With a Navi 31 chip expected this year, Navi 32 in 2023 that is smaller Navi 31, and the Navi 33 mobile push for AMD.
| AMD Navi 31 | AMD Navi 32 | AMD Navi 33 | |
|---|---|---|---|
| Codename | Plum Bonito | Wheat Nas | Hotpink Bonefish |
| Fab process | TSMC 5+6nm | TSMC 5+6nm | TSMC 6nm |
| Architecture | AMD RDNA 3 | AMD RDNA 3 | AMD RDNA 3 |
| GPU package | Multi-chip-module (MCM) | MCM | Monolithic |
| Chiplet config | 1x GCD + 6x MCD | 1x GCD + 4x MCD | – |
| GCD size | ~308mm² | ~200mm² | – |
| MCD | 6x ~37.5mm² | 4x ~37.5mm² | – |
| Full GPU | ~533mm² | ~350mm² | ~203mm² |
| Shader engines | 6 | 3 | 2 |
| Shader arrays | 12 | 6 | 4 |
| RDNA workgroups (WGP) | 48 | 30 | 16 |
| Compute units | 96 | 60 | 32 |
| Stream processors | 12,288 | 7,680 | 4,096 |
| VRAM | GDDR6 | GDDR6 | GDDR6 |
| Memory bus | 384-bit | 256-bit | 128-bit |
| Memory bandwidth | 864GB/s (18 Gbps) | 576GB/s (18 Gbps) | 288GB/s |
| Infinity cache | 96MB (0-hi) | 64MB (0-hi) | 32MB |
| PCIe interface | PCIe Gen5 | PCIe Gen5 | PCIe Gen5 |
| Release | Q4 2022 | 2023 | TBC |
| Rumored SKU | Radeon RX 7900 XT | Radeon RX 7800 XT | Radeon RX 7600 XT |
What are the codenames of the RDNA 3 chips?
For the Navi 3X RDNA 3 GPUs, we have the working codenames. Navi 31 is called Plum Bonito, Navi 32 is Wheat Nas, and Navi 33 is nicknamed Hotpink Bonefish. With the last one expected to be a mobile release.
How much inifinity cached will RDNA 3 have?
There have been final spec rumors that go through the details of what we can expect from the Navi 3x lineup. Navi 31 is said to feature 96MB, Navi 32 with 64MB, and Navi 33 32MB. Along with size, it is reported infinity cache has been updated in the new series. With MALL blocks halved, and increased bandwidth the penalty of going to VRAM has been reduced.
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