AMD is set to launch its next-gen Radeon RX 7000 GPUs this fall, beginning with the RX 7700 XT, and the RX 7900 XT. The RX 7800 XT will be launched in early 2023, followed by a mid-season refresh of sorts. We’re going to call it the RX 7950 XT but keep in mind that it’s just a placeholder. According to Greymon55, the purported Radeon RX 7950 XT will be a behemoth of a GPU. With a total of 16,384 stream processors or cores, it’ll pack a total of 8 Shader Engines which in turn will feature a total of 128 Compute Units and 64 Work Group Processors.
We don’t know whether the supposed Radeon RX 7950 XT will be a chiplet-based design or monolithic like Navi 31 (ignoring the MCDs), but RedGamingTech claims the former. According to them, it’ll feature two Graphics Compute Dies (GCDs) with 64 CUs and 8,192 shaders, each. It’s unclear whether the Infinity Cache will be scaled as well but 512MB is being speculated by some.
Recap of the Radeon RX 7900 XT, RX 7800 XT, RX 7700 XT
| GPU Name | RX 7700 XT (Navi 33) | RX 7800 XT (Navi 32) | RX 7900 XT (Navi 31) | RX 7950 XT (Navi 30?) |
|---|---|---|---|---|
| Process Node | 6nm | 5nm + 6nm | 5nm + 6nm | 5nm + 6nm |
| Die Config | 6nm x1 | 5nm x1, 6nm x4 | 5nm x1, 6nm x6 | 5nm x2, 6nm x6? |
| Shader Engines | 2 | 4 | 6 | 8 |
| WGPs | 16 | 32 | 48 | 64 |
| CUs | 32 | 64 | 96 | 128 |
| Cores | 4,096 | 8,192 | 12,288 | 16,384 |
| Memory Bus | 128-bit | 256-bit | 384-bit | 256-bit x2? |
| Memory Type | GDDR6 | GDDR6 | GDDR6 | GDDR6 |
| Memory Capacity | 8GB | 16GB | 16GB+ | 32GB? |
| Infinity Cache | 128MB | 256MB? | 384MB? | 512MB? |
| TGP | 200W | 350W | 400W | 450W? |
| Launch | Q4 2022 | Q1 2023 | Q4 2022 | 2023 |
Looking at the table, it’s apparent that the Radeon RX 7950 XT will feature two Navi 32 dies, pushing the overall Infinity Cache amount to 512MB, and the bus to a rather unimaginable 512-bit. I believe that AMD will likely trim the two to improve yields and cut down production costs. A 192-bit bus and 192MB L3 cache on each die for a total bus width of 384-bit and LLC of 384MB seem more practical. A few WGPs may be fused off as well depending on how the GeForce RTX 4090 performs but that’s all I can say with a healthy bit of skepticism. As always, like most “Big Navi” leaks, don’t get carried away till we see something more concrete.
