NVIDIA RTX 50 “Blackwell” GB202 GPU rumors point towards GDDR7 384-bit memory

Published: Nov 15th 2023, 15:05 GMT   Comments

Please note that this post is tagged as a rumor.

New rumors suggest NVIDIA RTX 50 GB202 GPU will use 384-bit memory

According to Kopite7kimi the next-gen flagship could arrive next year.

The upcoming RTX 50 series, built on the Blackwell architecture, is expected to maintain a similar cooler design to the current Ada Lovelace series. Additionally, reports suggest that NVIDIA will integrate GDDR7 memory into their next series, providing the gaming lineup with the anticipated bandwidth boost across the stack.

Contrary to what was shared earlier, Kopite7kimi has now retracted the prior statement about the GB202 GPU’s memory bus width. This GPU is expected to be the flagship gaming processor for the upcoming series. Initially, the information was that the GPU will use a 512-bit bus, but it is now clarified that the GPU will feature a 384-bit bus instead. This trend has been seen in major NVIDIA architectures over the past decade, and it appears to be continued for the RTX 50 series.

According to previously disclosed information, it is rumored that the NVIDIA GB202 GPU will incorporate a configuration of 192 SM (Streaming Multiprocessor), resulting in a potential maximum configuration of 24567 CUDA cores, provided that no significant modifications are made to the GPU architecture. This is, of course, the configuration of the GPU, not the specs of the flagship model.

As an example, the current RTX 4090 model doesn’t use the full AD102 GPU, either. Even after more than a year since its launch, NVIDIA sees no need for an even beefier model that would employ a higher spec GPU configuration. These GPUs are only used in the RTX ADA workstation series.

The upgrade to GDDR7 memory configuration will result in a major boost in bandwidth. The most recent Micron’s roadmap, the company that’s been collaborating with NVIDIA on GDDR5X and GDDR6X memory, shows that consumer GDDR7 memory is expected to reach 32 Gbps by the end of the year. In comparison to RTX 4090 which uses 21 Gbps GDDR6X memory, a potential GB202 GPU with 32 Gbps could reach a bandwidth of 1.5 TB/s, an increase of 50%. However, it is expected that at launch GDDR7 memory will use lower frequencies.

The potential release date of NVIDIA Blackwell RTX 50 series is not clear, but since B100 and GB200 graphics accelerators are now confirmed to launch between 2024-2025, it seems reasonable to expect gaming series within a similar timeframe.

NVIDIA Blackwell Rumors (GB202)
VideoCardz.comNVIDIA GB202NVIDIA AD102
ArchitectureBlackwellAda Lovelace
Total SM
CUDA Cores (Assumed)
Boost Clock
~2.9 GHz
2.5 GHz
~24 GB GDDR7
Memory Bus
L2 CacheTBC
Default TGPTBC
1599 USD
Release Date2024 (?)October 12th, 2022

Source: kopite7kimi

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