Please note that this post is tagged as a rumor.
Rumored specs of RDNA3 architecture has changed
According to Greymon55, the internal structure of the Navi 3X GPUs might be different from previously reported.
Not 15360 Stream Processor but 12288 for Navi 31 GPU, the flagship processor of the upcoming RDNA3 series. This means that the 92 TFLOPS claim from a few days ago is either wrong, or there is something else that we do not know about yet.
The Navi 31 with 6 Shader Engines, 12 Shader Arrays and 48 Work Group Processors would ship with up to 12288 Stream Processors, that’s a reduction of 20% in core count compared to previously rumored 15360 cores. The same applies to Navi 32, which instead of 10240 cores would ship with 8192 Stream Processors. For the Navi 31 this means 4096 cores instead of 5192, but it should be noted that lower core count was mentioned by Greymon55 before.
AMD Navi III (RDNA 3)
Navi 31: 12288 SPs, 48 WGPs, 12 SAs, 6 SEs
Navi 32: 8192 SPs, 32 WGPs, 8 SAs, 4 SEs
Navi 33: 4096 SPs, 16 WGPs, 4 SAs, 2 SEs https://t.co/h46ytpdifo
— Redfire (@Redfire75369) May 2, 2022
With the updated Navi 31 specs, the rumored TFLOPS would drop to 73 TFLOPS, and that’s assuming 3.0 GHz GPU clock. We still do not have any leaks or rumors on the Navi 32 and 33 clocks speeds, though.
Navi 31 old → new spec
60 WGP, 15'360 FP32 → 48 WGP, 12'288 FP32
on 3 GHz = 73 TFlops
Navi 32 old → new spec
40 WGP, 10'240 FP32 → 32 WGP, 8'192 FP32
Navi 33 remains the same (16 WGP, 4096 FP32).
— 3DCenter.org (@3DCenter_org) May 2, 2022
One should remember that we are still months away from the launch of new 3rd Gen Navi GPUs. This is, however, the first major update to the rumored specs that have been shared for more than a year. So unless there are other reliable sources claiming otherwise, we will assume that those specs are closer to final.
Furthermore, the specs posted below only represent the full GPU configuration, which may not be guaranteed at launch for 7900/7700/7600 series. AMD may choose to lower the specs for each GPU to increase the yields for its Radeon RX 7000 graphics cards.
|Rumored Specs of AMD RDNA3 GPUs|
|Fabrication Node||TSMC 5nm + 6nm||TSMC 5nm + 6nm||TSMC 6nm|
|Architecture||AMD RDNA3||AMD RDNA3||AMD RDNA3|
|GPU Package||Multi-Chip-Module (MCM)||Multi-Chip-Module (MCM)||Monolithic|
|Estimated GPU Size||~800 mm² (or more)||TBC||~440 mm²|
|RDNA Workgroups (WGP)||60 → 48||40 → 32||20 → 16|
|Compute Units||120 → 96||80 → 64||40 → 32|
|Stream Processors||15360 → 12288||10240 → 8192||5120 → 4096|
|GPU Clock||~3.0 GHz||TBC||TBC|
|Memory & Bus||GDDR6 256-bit||GDDR6 192-bit||GDDR6 128-bit|
|Infinity Cache||256 – 512MB||256 – 384MB||128 – 256MB|
|Release||Q3/Q4 2022||Q3/Q4 2022||Q1 2023|
|Rumored SKU||Radeon RX 7900XT||Radeon RX 7700XT||Radeon RX 7600XT|
|FP32 Performance||~ 92 → 73 TFLOPS||TBC||TBC|
|All information is based on rumors|
Source: Greymon55, Kepler_L2