Leaker claims AMD RDNA 5 is bigger than expected, with 2x large Compute Units
AMD’s planned RDNA 5 graphics cards reportedly feature reworked Compute Units with doubled Stream Processor counts
AMD’s RDNA 5 GPUs could be much bigger than expected. According to the leaker zhangzhonghao, AMD has changed the structure of its Compute Units (CU) with RDNA 5. Instead of having 64 Stream Multiprocessors (SM) per Compute Unit, RDNA 5 reportedly features 128. That’s a 2x increase in SM count per CU.
Currently, it is unknown what architectural changes AMD has made to RDNA 5. It is also known how this change will impact the performance of AMD’s next-generation graphics cards. How will this change impact per Compute Unit performance? Will RDNA 5 deliver the same, or better, performance per SM as RDNA 4?
This explains a discrepancy between recent RDNA 5 GPU leaks
Recent leaks for AMD’s next-generation GPUs have presented conflicting information. A recent leak from Kepler_L2 suggested that AMD’s AT3 and AT4 GPUs would feature 24 and 12 CUs, respectively. In contrast, Moore’s Law is Dead claimed that AMD’s AT3 and AT4 GPUs had 48 and 24 CUs.
It is possible that Moore’s Law is Dead’s leak is based his CU count data on leaked SM data. If he assumed that each CU has 64 SMs, then his CU counts would be correct. If AMD’s RDNA 5 Compute Units feature 128 SMs, then his reported CU counts would be too high.
The big question this presents is this: Will AMD’s rumoured 96-CU RDNA 5 GPU perform like a 192-CU chip? Remember, AMD’s RDNA 4 flagship, the RX 9070 XT, only has 64 CUs.
(zhangzhonghau – Chiphell)
If this leaker is correct, AMD’s RDNA 5 GPU architecture could be much more performant than expected. However, it remains to be seen how much these higher SM counts will impact overall GPU performance. Will AMD’s RDNA 5 CUs deliver the same performance as two RDNA 4 CUs with this configuration? We will find out more when AMD officially unveils its RDNA 5 architecture. Until then, we can only speculate about the impact of these changes.
You can join the discussion on AMD’s RDNA 5 graphics cards reportedly featuring 2x more stream processors per Compute Unit on the OC3D Forums.
