AMD ROCm Software update confirms Navi 32 GPU has 60 Compute Units

Published: Nov 25th 2022, 15:51 GMT   Comments

AMD ‘confirms’ Navi 32 with 60 Compute Units, Navi 33 has 32

The rumor from Angstronomics on possible lower core count for Navi 32 GPU has now been indirectly confirmed by AMD. 

AMD Navi 31 (RDNA3) GPU for Radeon RX 7900 Series, Source: AMD

The site alleged that Navi 32 GPU has 30 Workgroup processors instead of the previously rumored 32. This means that the CU (Compute Unit) count is not 64 but 60. Exactly this number is now mentioned by AMD developers for ROCm software in a file called “performance.hpp” published 2 days ago.

ROCm Software Platform, Source: AMD/Github

Furthermore, the same core refers to Navi 33 GPU with CU count of 32, which matches previous rumors as well. Given what we already know about RDNA3 architecture, this means that full Navi 32 GPU offers 3840 Stream processors while Navi 33 has 2048 respectively.

Not much has changed since August leaks, the rumored specs, especially from Angstronomics have been very accurate. The only change that we had to implement to our spec chart is higher memory speed (from rumored 18 Gbps to 20 Gbps) and PCIe Gen4 support instead of Gen5.

A bigger question is where will Navi 32 and 33 actually land in terms of Radeon SKUs. The Radeon RX 7900 desktop series appear to be exclusively based on Navi 31 GPU, while Navi 32 may very well be launched as Radeon RX 7800 desktop GPUs and possibly as laptop RX 7900M GPU.

Therefore, it is expected that AMD will talk more about Navi 32 GPU at CES 2023 in January. At the event the company very likely to reveal its Radeon RX 7000M series alongside new Ryzen 7000 laptop.

Codename“Plum Bonito”“Wheat Nas”“Hotpink Bonefish”
Fabrication NodeTSMC N5/N6TSMC N5/N6TSMC N5/N6
GPU PackageMulti-Chip-Module (MCM)Multi-Chip-Module (MCM)Monolithic
Chiplet Configuration1x GCD + 6x MCD1x GCD + 4x MCD
GCD Size300 mm²~200 mm²
MCD6x ~37 mm²4x ~37 mm²
Full GPU522 mm²~348 mm²~203 mm²
Shader Engines632
Shader Arrays1264
RDNA Workgroups (WGP)483016
Compute Units966032
Stream Processors 614438402048
FP32 Cores1228876804096
Memory & BusGDDR6 384-bitGDDR6 256-bitGDDR6 128-bit
Memory Bandwidth960 GB/s (20 Gbps)640 GB/s (20Gbps)320 GB/s (20Gbps)
 Infinity Cache96 MB64 MB32 MB
PCIe InterfacePCIe Gen4PCIe Gen4PCIe Gen4
ReleaseDecember 2023TBCTBC
SeriesRadeon RX 7900 desktopRadeon RX 7800 desktop
Radeon RX 7900 mobile
Radeon RX 7600 desktop
Radeon RX 7700 mobile

Source: Github (ROCmSoftwarePlatform) via @Kepler_L2

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