NVIDIA Blackwell "GB203" GPU Could Sport 256-bit Memory Interface

[T0@st]

Speculative NVIDIA GeForce RTX 50-series "GB20X" GPU memory interface details appeared online late last week—as disclosed by the kopite7kimi social media account. The inside information aficionado—at the time—posited that the "memory interface configuration of GB20x (Blackwell) is not much different from that of AD10x (Ada Lovelace)." It was inferred that Team Green's next flagship gaming GPU (GB202) could debut with a 384-bit memory bus—kopite7kimi had "fantasized" about a potentially monstrous 512-bit spec for the "GeForce RTX 5090." A new batch of follow-up tweets—from earlier today—rips apart last week's insights. The alleged Blackwell GPU gaming lineup includes the following SKUs: GB202, GB203, GB205, GB206, GB207.

Kopite7kimi's revised thoughts point to Team Green's flagship model possessing 192 streaming multiprocessors and a 512-bit memory bus. VideoCardz decided to interact with the reliable tipster—their queries were answered promptly: "According to kopite7kimi, there's a possibility that the second-in-line GPU, named GB203, could sport half of that core count. Now the new information is that GB203 might stick to 256-bit memory bus, which would make it half of GB202 in its entirety. What this also means is that there would be no GB20x GPU with 384-bit bus." Additional speculation has NVIDIA selecting a 192-bit bus for the GB205 SKU (AKA GeForce RTX 5070). The GeForce RTX 50-series is expected to arrive later this year—industry experts are already whispering about HPC-oriented Blackwell GPUs being unveiled at next week's GTC 2024 event. A formal gaming family announcement could arrive many months later.



View at TechPowerUp Main Site | Source

 

[NuCore]

NVIDIA Blackwell "GB203" GPU Could Sport 256-bit Memory Interface?​

I think should be:

NVIDIA Blackwell "GB203" GPU Could Support 256-bit Memory Interface​

 

[arbiter]

going with fact GDDR7 is gonna be memory on it yea expected it would stay with simple memory controller setup since memory will be a bit faster.

As for Sport vs support the context in which it used fits as its saying that is likely what gpu is gonna be vs its possible to support xxx.

 

[Pumper]

So this time the gap between 80 and 90 will be even bigger?

 

[Udyr]

NVIDIA Blackwell "GB203" GPU Could Sport 256-bit Memory Interface?​

I think should be:

NVIDIA Blackwell "GB203" GPU Could Support 256-bit Memory Interface​

Sport as in "wear or be decorated" with something.

The title is fine.

 

[Denver]

Sport as in "wear or be decorated" with something.

The title is fine.

"The GPU could feature a 256-bit memory interface." It would sound better that way. But anyway...
Nvidia is predictable, most already knew.

 

[Udyr]

"The GPU could feature a 256-bit memory interface." It would sound better that way. But anyway...
Nvidia is predictable, most already knew.

Your suggestion is valid, but considering how stingy some higher end GPUs are with bus width, one could argue the writer jokingly meant that a 256bit is a luxury/decoration.

 

[Onasi]

GDDR7 is probably going to be quite pricey initially, so makes sense for NV to cut costs on everything they can apart from the most too of the line halo SKU which is likely to be priced at unreasonable levels anyway.

 

[N/A]

K7k flip-flops again last week was 384 GB202

lets hope Nvidia keeps it reasonable $999/1999 5080/90 /w 12032/22016 cudas. But i can't see 5080 leading to 4090 in ratser with this spec. 25% faster memory and 25% more shaders spells a very weak 80 class gen on gen improvement. In RT RT is different but who cares.

But knowing that Nvidia made a mistake with 1080ti pricing it 699, 2080 ti correction to $1199, then again 3080 $699, 4080 $1199, who knows. Can they perhaps go for a 699 5070 256 bit. In 2025 a 12 GB 192 bit 5070 doesn't make any sense.

 

[THU31]

But will they use 3 GB GDDR7 modules? Seems like they'd have to with those bus widths. No way they're gonna put 16/32 GB on a 5080, or 12/24 GB on a 5070. The halfway point seems like a sweet spot.

Double the CUs in GB202 seems insane. Can't wait to see the price.

 

[T_Zel]

But will they use 3 GB GDDR7 modules? Seems like they'd have to with those bus widths. No way they're gonna put 16/32 GB on a 5080, or 12/24 GB on a 5070. The halfway point seems like a sweet spot.

Double the CUs in GB202 seems insane. Can't wait to see the price.

3GB modules don't exist yet. I wouldn't bank on them existing by the time Blackwell releases either. So if these rumoured bus widths are accurate, I sure hope Nvidia is planning to clamshell because otherwise... yikes.

 

[Metroid]

Nvidia is going for the high margin and that is 5090 only, will charge minimum 1999 usd. Peasants will have to be happy with 5070 and average joe will have to be happy with 5080. They did the same this actual gen, 4090 and 4080 difference is big, many went for 4090.

 

[Minus Infinity]

K7k flip-flops again last week was 384 GB202

lets hope Nvidia keeps it reasonable $999/1999 5080/90 /w 12032/22016 cudas. But i can't see 5080 leading to 4090 in ratser with this spec. 25% faster memory and 25% more shaders spells a very weak 80 class gen on gen improvement. In RT RT is different but who cares.

But knowing that Nvidia made a mistake with 1080ti pricing it 699, 2080 ti correction to $1199, then again 3080 $699, 4080 $1199, who knows. Can they perhaps go for a 699 5070 256 bit. In 2025 a 12 GB 192 bit 5070 doesn't make any sense.

You are assuming Blackwell architecture is same as Lovelace, which it's not. This is quite a large architectural redesign, so all bets are off.

But will they use 3 GB GDDR7 modules? Seems like they'd have to with those bus widths. No way they're gonna put 16/32 GB on a 5080, or 12/24 GB on a 5070. The halfway point seems like a sweet spot.

Double the CUs in GB202 seems insane. Can't wait to see the price.

No, not until 2026 at the earliest, so maybe in Super series updates in 2027. 3GB modules are more than a year after 2GB GDD7 modules appear.

 

[Hyderz]

the gap between 5090 and 5080 is massive....