GeForce RTX 50 Blackwell GB20X GPU specs have been leaked

[harlan4096]

Please note that this post is tagged as a rumor.

GeForce RTX 50 Blackwell GPU series leaked

Kopite7kimi reveals configurations of all RTX 50 GPUs. 



Last week, Kopite7kimi hinted that the configuration of the GB203 GPU is different from what was previously thought. Instead of 96 Streaming Multiprocessors, the actual design has 84 SMs. Despite our best efforts, the leaker did not confirm the exact configurations of the remaining GPUs at the time.

However, today the leaker provided the list of all five upcoming Blackwell GB20X processors along with their configurations. It is now confirmed that not all of them will have the same configuration as the RTX 40 series, but there are at least two processors that will have an identical core count.

The GB202 is still expected to feature 12 GPCs and 8 TPC per GPC, resulting in a total SM count of 192 (assuming 2 per TPC). This, however, does not mean NVIDIA will use such a configuration for the actual product, like the RTX 5090. The retail SKU will likely feature a cut-down configuration to maintain good yields.

We also know that NVIDIA Is planning to use a 448-bit memory bus, although the GPU supposedly offers a 512-bit.

The GB203 features a 7×6 configuration, which means a total of 84 Streaming Multiprocessors. This GPU is confirmed to have a 256-bit memory bus, making it nearly identical to the AD103 GPU (same core count, same memory bus). The new feature is GDDR7 memory support.

NVIDIA RTX 50 Blackwell GB20X series

• GB202: 12(GPC) ×8(TPC) = 192 SM, 512-bit GDDR7
  
• GB203: 7×6 = 84 SM, 256-bit GDDR7
  
• GB205: 5×5 = 50 SM, 192-bit GDDR7
  
• GB206: 3×6 = 36 SM, 128-bit GDDR7
  
• GB207: 2×5 = 20 SM, 128-bit GDDR6
  

The GB205 is said to feature a 5×5 config, which means a total SM count of 50, a downgrade from 60 SMS on AD104 on Ada Lovelace series. As a reminder, the GB205 is said to be the AD104 successor.

According to Kopite7kimi, there are two more Blackwell GPUs: GB206 and GB207. Both feature a 128-bit memory bus, but only the former has GDDR7 memory, while the GB207 products are said to feature GDDR6 technology. The configuration of GB206 should match that of AD106, but the GB207 is to feature 20 SMs in total, a downgrade from 24 SMs on AD107.

The NVIDIA GeForce RTX 50 series is now expected to launch in early 2025, though the announcement may take place this year.
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