• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Discussion RDNA 5 + CDNA 4 Architectures Thread

Page 2 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
basix said:
MI400 should already be CDNA5. So maybe RDNA6 & CDNA5 = UDNA? Huynh mentioned framed it as a cloud-to-client strategy, which wold match that. CDNA5 is first and RDNA6 follows. RDNA5 could be still somewhat close to RDNA2 which might be better for next-gen consoles also.
Click to expand...
So, going forward, we’re thinking about not just RDNA 5, RDNA 6, RDNA 7, but UDNA 6 and UDNA 7. We plan the next three generations because once we get the optimizations, I don't want to have to change the memory hierarchy, and then we lose a lot of optimizations. So, we're kind of forcing that issue about full forward and backward compatibility.
Click to expand...
 
Joe NYC said:
I posted about this feature of Mi455x before, in a wrong thread. I spotted it in one of the SamiAnalysis slides.

It is additional LPDDR5x attached to the base logic die of HBM modules. AMD is apparently is using a custom die for that.
Click to expand...
Not news, they've been trying to force tiered GPU memory into the market since MI300A and its CXL2.0 implementation.
 
adroc_thurston said:
Not news, they've been trying to force tiered GPU memory into the market since MI300A and its CXL2.0 implementation.
Click to expand...

It looks like they are making it a (so far secret) feature of Mi455.

24 LPDDR5x chips could be 768 GB of memory if they use 32 GB chips, which is in addition to 432 GB of HBM4 memory.

I am not sure how NVidia Rubin competes with this, especially in inference.
 
Joe NYC said:
I posted about this feature of Mi455x before, in a wrong thread.
Click to expand...
Now I'm confused. This thread says CDNA4 (MI355X). There's a CDNA 6 thread and then there's the RDNA5/UDNA (CDNA Next) thread which can only be for CDNA5.

IDK. Someone should prob rename the threads.
 
MrMPFR said:
Now I'm confused. This thread says CDNA4 (MI355X). There's a CDNA 6 thread and then there's the RDNA5/UDNA (CDNA Next) thread which can only be for CDNA5.

IDK. Someone should prob rename the threads.
Click to expand...

I think I got my CDNA versions confused. I thought Mi400 was CDNA4
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top