The forthcoming RTX 50 series, built on the Blackwell architecture, is anticipated to retain a comparable cooling design to the existing Ada Lovelace series. Moreover, indications suggest that NVIDIA plans to incorporate GDDR7 memory in their upcoming series, delivering the gaming lineup an expected increase in bandwidth throughout the range.
In contrast to previous information, Kopite7kimi has withdrawn the earlier statement regarding the memory bus width of the GB202 GPU. This GPU is anticipated to serve as the flagship gaming processor for the upcoming series. Initially, it was indicated that the GPU would utilize a 512-bit bus, but it has now been clarified that the GPU will, in fact, have a 384-bit bus. This trend, observed in significant NVIDIA architectures over the past decade, seems set to persist in the RTX 50 series.
As per the information disclosed earlier, there are rumors suggesting that the NVIDIA GB202 GPU might feature a setup of 192 SM (Streaming Multiprocessor), potentially yielding a maximum configuration of 24,567 CUDA cores, assuming no substantial alterations are made to the GPU architecture. It’s important to note that this pertains to the GPU configuration, not the specifications of the flagship model.
Illustratively, the present RTX 4090 model also doesn’t fully utilize the AD102 GPU. Despite being on the market for over a year, NVIDIA hasn’t deemed it necessary to introduce a more powerful model incorporating a higher-spec GPU configuration. Such GPUs are exclusively employed in the RTX ADA workstation series.
Upgrading to the GDDR7 memory configuration is poised to deliver a significant surge in bandwidth. According to the latest roadmap from Micron, the collaborator with NVIDIA on GDDR5X and GDDR6X memory, consumer GDDR7 memory is projected to achieve 32 Gbps by year-end. Contrasting this with the RTX 4090’s utilization of 21 Gbps GDDR6X memory, a potential GB202 GPU featuring 32 Gbps could attain a bandwidth of 1.5 TB/s, marking a 50% increase. However, it is anticipated that GDDR7 memory will initially employ lower frequencies upon launch.
While the precise release date for the NVIDIA Blackwell RTX 50 series remains uncertain, the confirmation of the B100 and GB200 graphics accelerators launching between 2024-2025 suggests a plausible expectation for the gaming series to debut within a comparable timeframe.
As I mentioned before, GA100 is 8*8, and GH100 is 8*9. GB100 will have a basic structure like 8*10. GB202 looks like 12*8.
— kopite7kimi (@kopite7kimi) September 28, 2023