Nvidia quietly unveils 72GB RTX PRO 5000 “Blackwell” GPU

Nvidia lists upgraded 72GB RTX PRO 5000 Blackwell GPU on its website

Nvidia has officially unveiled a new 72GB version of its RTX PRO Blackwell PRO 5000 graphics card. With 50% more GDDR7 memory than Nvidia’s existing 48GB model, Nvidia’s new RTX PRO 5000 variant will come as great news for users with memory-hungry workloads. This new model was first spotted by Techpowerup, as Nvidia unveiled this GPU without informing the press.

Both RTX PRO 5000 Blackwell GPUs are said to feature the same 512-bit memory bus and the same levels of memory bandwidth. This suggests that Nvidia is using an odd memory configuration for these memory GPUs. After all, you can’t get 72GB of memory by using 3GB memory chips on a 512-bit memory bus. Each GDDR7 memory chip attaches to a 32-bit memory interface. That means that sixteen chips need to be attached to a 512-bit memory bus. 16 x 3GB is 48GB. That’s the memory config of Nvidia’s older RTX PRO 5000 GPU. To get 72GB, Nvidia needs to use two 3GB modules on eight of their GPU’s 32-bit memory interfaces. If this is true, some 32-bit interfaces will have 6GB of memory while others will have 3GB.

Both RTX PRO 5000 Blackwell GPUs feature the same memory bandwidth and CUDA core count. Only the memory capacity of Nvidia’s GPU has changed. That said, for many users, this is the GPU’s most important specification. Both models also have a TDP of 300W.

(Specifications from Nvidia)

In the UK, Nvidia’s RTX PRO 5000 Blackwell 48GB GPU costs over £4,300. For this new 72GB version, we’d expect this GPU’s price tag to increase by at least £1,000. After all, memory capacity is one of the most critical specifications for many users. More memory means larger data sets and more complex workloads.

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