NVIDIA GeForce RTX 50 “Blackwell” Flagship Reportedly Features GB202 GPU With Up To 192 SM Units & 512-bit Bus

wccftech.com:

NVIDIA's next-gen GeForce RTX 50 "Blackwell" GPU rumors have started to roll out from reliable leakers such as Kopite7kimi.

NVIDIA's GeForce RTX 50 "Blackwell" GPU rumors already began a few months ago when the last of the GeForce RTX 40 GPUs were done making their way to the market. Labeled as "Ada-Next", these next-gen chips will be the basis of NVIDIA's brand new gaming lineup which targets a 2025 release date according to the official roadmap but rumors are also suggesting that the launch may happen earlier.

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

So starting with the details, Kopite7kimi posted on X about two configurations of Blackwell GPUs. The first one is the HPC/AI-oriented chip known as GB100 which has recently been stated to utilize the TSMC 3nm process node and targeting a late 2024 launch (announcement during GTC 2024).

The GB100 GPU is expected to be the first HPC chip from NVIDIA to utilize an MCM design and will be based on an 8 GPC cluster which includes 10 TPCs per cluster and each cluster will carry 2 SMs for a total of 160 SM units on the fully enabled die. The top die will also feature an 8192-bit wide bus interface which will support the latest HBM standards such as HBM3e.

Both Ampere & Hopper feature different FP32/FP64 core count arrangments but if NVIDIA were to follow the 128 FP32 core count per SM for Blackwell, it would end up with a possible 20,480 FP32 cores on a fully enabled die. The following is how the NVIDIA HPC parts compare against Blackwell GB100:

Moving back to the gaming part, the GB202 GPU is rumored to feature a vastly different GPU config as we have seen