GeForce RTX 50 Blackwell GB20X GPU Specs Unveiled
June 11, 2024
GeForce RTX 50 Blackwell GB20X GPU Specs Unveiled

Last week, a trusted leaker known as Kopite7kimi hinted at unexpected changes in the configuration of NVIDIA’s upcoming GB203 GPU. Initially thought to feature 96 Streaming Multiprocessors (SMs), the design was revised to include 84 SMs. Despite efforts to gather more details at that time, the leaker didn't provide complete configurations for the remaining GPUs. Today, however, we have a comprehensive list of all five upcoming Blackwell GB20X processors along with their specs.

GB203 GPU: Revised Expectations

The GB203 GPU was initially expected to come with 96 SMs. However, new information confirms it will have 84 SMs, arranged in a 7x6 configuration. This GPU will also support a 256-bit memory bus, which aligns it closely with the AD103 GPU, but with the added advantage of GDDR7 memory support. This marks a significant shift from earlier reports, reflecting NVIDIA’s ongoing adjustments to optimize performance and yield.

Detailed Configurations of Blackwell GB20X Processors


  • Expected Configuration: The GB202 GPU is anticipated to feature 12 Graphics Processing Clusters (GPCs) and 8 Texture Processing Clusters (TPC) per GPC, leading to a total of 192 SMs (assuming 2 SMs per TPC).
  • Memory Bus: NVIDIA plans to equip the GB202 with a 448-bit memory bus, although it inherently supports a 512-bit bus.
  • Product Implementation: For retail purposes, such as the RTX 5090, NVIDIA will likely use a cut-down version to ensure high manufacturing yields.


  • Confirmed Configuration: As mentioned, the GB203 will have 84 SMs, arranged in a 7x6 layout.
  • Memory Bus: This GPU will use a 256-bit memory bus.
  • New Features: It introduces GDDR7 memory support, enhancing its performance capabilities.

Comparing GB20X to the RTX 40 Series

It's confirmed that not all Blackwell GB20X GPUs will share the same configurations as their RTX 40 series counterparts. However, at least one model will feature an identical core count. This variability indicates NVIDIA's strategy to tailor each GPU to meet specific performance and market demands.

The Implications of the New Leaks

Enhanced Performance with GDDR7 Memory

The introduction of GDDR7 memory support across these new GPUs signifies a substantial performance boost. GDDR7 memory is expected to offer higher bandwidth and better power efficiency compared to GDDR6, making these GPUs highly suitable for demanding applications and gaming experiences.

Memory Bus Adjustments

The decision to equip the GB202 with a 448-bit memory bus, despite its 512-bit capability, suggests a strategic approach to balance performance and production efficiency. These adjustments aim to maximize yields while still delivering robust performance metrics.

Anticipated Market Impact

The unveiling of these configurations has stirred excitement in the tech community. Enthusiasts and professionals alike are eagerly awaiting the official release, expecting these GPUs to set new benchmarks in graphics performance. The inclusion of advanced memory technology and the strategic use of memory bus capabilities indicate NVIDIA’s commitment to pushing the envelope in GPU technology.


The recently leaked specifications of NVIDIA's GeForce RTX 50 Blackwell GB20X GPUs have provided valuable insights into the future of graphics technology. With significant changes from initial expectations and the introduction of GDDR7 memory support, these GPUs are poised to deliver exceptional performance. As we await further official announcements, it's clear that NVIDIA continues to innovate and adapt to meet the evolving demands of the market.