Tuesday, November 30, 2021
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AMD’s Navi 33 RDNA 3 GPU to sport lower core count than previously reported

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According to fresh rumours, AMD’s rDNA 3 based Navi 33 GPU which will power the next-gen Radeon RX 7000 series graphics cards will have fewer cores than what was expected. As we know, we had heard previous rumours which stated that AMD’s rDNA 3 Navi 33 GPU powering the Radeon RX 7000 series will have up to 5120 cores or 20 WGP’s however, now it seems that the core count is lower.

However, it’s also true that having a lower core count will in no way affect the performance of the device. Despite having a lower core count, the Navi 33 GPU will reportedly be offering a faster GPU performance than the Navi 21 GPU which is currently AMD’s flagship RDNA 2 chip for the high-end segment.

AMD RDNA 3 Navi 33 GPUs For Radeon RX 7700 Series

It’s expected to feature 2 Shader Engines and each Shader Engine has 2 Shader Arrays (2 per SE / 4 in total). It was previously expected that each Shader Array was composed of 5 WGPs (10 per SE / 20 total) and each WGP features 8 SIMD32 units with 32 ALUs (40 SIMD32 per SA / 80 per SE / 160 total).

However, according to the latest rumours, the RDNA 3 Navi 33 GPU will feature a total of 16 WGPs or 4096 cores.

AMD RDNA 3 Navi 3X GPU Configurations (Preliminary)

GPU NameNavi 21Navi 33Navi 32Navi 31
GPU Process7nm6nm5nm/6nm5nm/6nm
GPU PackageMonolithicMonolithicMCMMCM
Shader Engines424 (2 per GCD)6 (3 per GCD)
GPU WGPs402040 (20 per GCD)60 (30 per GCD)
SPs Per WGP128256256256
Compute Units (Per Die)804080
160 (Total)
120
240 (Total)
Cores (Per Die)5120512051207689
Cores (Total)512051201024015360
Memory Bus256-bit128-bit192-bit256-bit
Memory TypeGDDR6GDDR6GDDR6GDDR6
Infinity Cache128 MB256 MB384 MB512 MB
Flagship SKURadeon RX 6900 XTXRadeon RX 7700 XT?Radeon RX 7800 XT?Radeon RX 7900 XT?
TBP330W~200W~300W~400W
LaunchQ4 2020Q4 2021?Q4 2021?Q4 2021?

As we know, AMD is expected to launch its Navi 33 (RDNA 3) with 256 MB of Infinity Cache and each of the GPU will also feature 2 memory connect links (32-bit). That’s a total of 4 32-bit memory controllers for a 128-bit bus interface. This would bring the performance of the AMD Radeon RX 7600 series above the RX 6800 and RX 6900 series at a TDP of around 200W.  The GPU is expected to be taped out soon & launch is expected around October 2022.

AMD RDNA Generational GPU Lineup

Radeon LineupRadeon RX 5000Radeon RX 6000Radeon RX 7000Radeon RX 8000
GPU ArchitectureRDNA 1RDNA 2RDNA 3 / RDNA 2RDNA 4
Process Node7nm7nm5nm/6nm?5nm/3nm?
GPU FamilyNavi 1XNavi 2XNavi 3XNavi 4X
Flagship GPUN/ANavi 21 (5120 SPs)Navi 31 (15360 SPs)Navi 41
High-End GPUNavi 10 (2560 SPs)Navi 22 (2560 SPs)Navi 32 (10240 SPs)Navi 42
Mid-Tier GPUNavi 12 (2560 SPs)Navi 23 (2048 SPs)Navi 33 (5120 SPs)Navi 43
Entry-Tier GPUNavi 14 (1536 SPs)Navi 24 (1024 SPs)Navi 34 (2560 SPs)Navi 44

source

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Avatar of Nivedita Bangari
Nivedita Bangari
I am a software engineer by profession and technology is my love, learning and playing with new technologies is my passion.

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