Rumor mill: Nvidia unveiled next-gen "Blackwell" GPUs for the AI industry back in March, but consumer-centric RTX 50-series cards based on the same platform aren't expected until later this year. The company remains tight-lipped about its upcoming hardware, but a massive leak has seemingly revealed the configurations of all five Blackwell RTX 5000 GPUs.
The leak comes from prolific tipster @kopite7kimi, who claims that the top-of-the-line GB202 GPU will feature 12 GPCs with eight TPCs each. If the rumor is correct, the flagship Blackwell GPU will have 96 TPCs in total, with each TPC likely housing two Streaming Multiprocessors (SMs) for a total of 192 SMs. The GB202 is also said to support GDDR7 VRAM with a memory bus interface of up to 512-bit.
The GB202 is expected to power the RTX 5090, but Nvidia is unlikely to use the aforementioned configuration in its flagship gaming card. According to earlier rumors, the RTX 5090 could feature only a 448-bit memory bus, suggesting that the company plans to use only 14 of the 16 memory modules available on the processor. Online speculation also suggests that the RTX 5090 will feature 28GB of GDDR7 memory with a maximum memory bandwidth of 1568 GB/s.
GB202 12*8 512-bit GDDR7
– kopite7kimi (@kopite7kimi) June 11, 2024
GB203 7*6 256-bit GDDR7
GB205 5*5 192-bit GDDR7
GB206 3*6 128-bit GDDR7
GB207 2*5 128-bit GDDR6
Next up is the GB203 GPU, which is expected to power the RTX 5080. It is rumored to feature seven GPCs, each with six TPCs, for a total of 42 TPCs and 84 SMs. This chip is also expected to feature a 256-bit memory bus interface.
As for the RTX 5070 and RTX 5070 Ti, they will likely be based on the GB205, which will come with five GPCs, each with five TPCs, for a total of 25 TPCs. It will have 50 SMs in all and a 192-bit memory bus interface.
The GB206 is expected to power the RTX 5060 Ti. It will reportedly pack three GPCs, each with six TPCs, for a total of 18 TPCs and 36 SMs. Unlike the more powerful GPUs in the Blackwell family, the GB206 is said to have a relatively narrow 128-bit bus interface, which could result in some performance bottlenecks.
It remains to be seen if Nvidia's memory compression algorithms and larger L2 caches will be able to overcome these obstacles and offer mainstream gamers good value for their money.
Finally, the GB207 GPU, which is likely to power the RTX 5060 and/or RTX 5050, is rumored to ship with two GPCs, each with five TPCs, for a total of 10 TPCs and 20 SMs. Like the GB206, this one will reportedly also have a 128-bit memory interface, but unlike the rest of the GPUs in the lineup, it will only support GDDR6 memory. This choice was possibly made to save money and differentiate between the mainstream and low-end SKUs without cutting down the specs any further.