TECH NEWS – The GB200 GPUs can have a maximum of 384-bit memory bus, just like the AD100s seen in the GeForce RTX 4000 graphics cards.
This was posted by Twitter user Kopite7kimi, so it’s likely that the Blackwell architecture will follow the same architecture as Ada Lovelace. To recap: AD102 (384-bit), AD103 (256-bit), AD104 (192-bit), AD106 (128-bit), AD107 (128-bit). The lower the last digit, the more powerful the chip, and it used to end in 0, so Nvidia might be hiding their most powerful hardware from us. The AD107 chip (which in laptops could be the RTX 4050, of which there is no desktop version) could come with up to a 96-bit bus, but that’s only being pushed by Nvidia in laptops.
The RTX 4090 and RTX 6000 Ada for professional users are the current top-of-the-line models with 384-bit interfaces and 24/48 GB of VRAM. Considering the first generation of GDDR7 dies, Nvidia will certainly not change the memory configuration. Using the standard 16 Gigabit (i.e. 2 Gigabyte) circuits, the GB202 could have 384-bit, 32 Gbps, max. 24 GB VRAM, 1536 GB/s, followed by the GB203 (256-bit, 32 Gbps, max. 16 GB VRAM, 1024 GB/s), GB204 (192-bit, 32 Gbps, max. 12 GB VRAM, 768.0 GB/s), GB206 (128-bit, 32 Gbps, max. 8 GB VRAM, 512.0 GB/s) and GB207 (128-bit, 32 Gbps, max. 8 GB VRAM, 512.0 GB/s).
Nvidia can modify this in several ways: it can use a lower memory clock speed than the entry-level models, or it can use a double-sided DRAM circuit. We’ve already seen this in the RTX 4060 Ti, which has 16 GB of VRAM. If it continues to have a maximum of 24 GB of VRAM, this would be the third generation with this limit, as it was already that much in the RTX 3090. AMD’s cards have a lot more VRAM, and with 8 gigs starting to become scarce for 1080p gaming these days, Nvidia needs to step up.
Previous rumors have suggested that the RTX 5000 cards will be manufactured using TSMC’s 3-nanometer process and will feature a cooling system similar to the current FE Founders Edition with DisplayPort 2.1 support. Their release is expected towards the end of the year, almost a year after the RTX 4000 Super cards.
Source: WCCFTech
Although I still have fantasies about 512 bit, the memory interface configuration of GB20x is not much different from that of AD10x.
— kopite7kimi (@kopite7kimi) March 9, 2024
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