Nvidia BlueField-4 with 64 Arm Cores and 800G Networking Announced for 2026

NVIDIA BlueField 4 DPU Announcement Close At GTC DC 2025

Today at NVIDIA GTC October 2025 (GTC DC), the company had a number of new announcements, but one stuck out. The next-generation NVIDIA BlueField-4 DPU will support not just 800G and NVIDIA ConnectX-9 networking, but also it will sport 64 Arm cores.

NVIDIA BlueField-4 with 64 Arm Cores and 800G Networking Announced for 2026

We did not get a full set of specs here, but we see a NVIDIA BlueField-4 DPU with 126 billion transistors. We also have the NVIDIA ConnectX-9 networking and 800G specs.

NVIDIA BlueField 4 DPU Announcement At GTC DC 2025

Perhaps the most interesting is that the new DPU has a 64-core “Grace” CPU. That is interesting since NVIDIA has used Grace for its current generation Arm Neoverse V2 parts as well as for the GB10 with two types of Arm Cortex cores.

Given this is slated to be a Rubin and 2026 generation part, we would expect it also to be at least PCIe Gen6 capable. To be fair, the press release said “NVIDIA BlueField-4 is expected to launch in early availability as part of NVIDIA Vera Rubin platforms in 2026.” (Source: NVIDIA)

On stage, Jensen said that one of the big drivers for the new NIC is to help accelerate the KV cache functions in its systems. While the NVIDIA Rubin CPX is focused more on prefill, the KV cache helps with things like being able to pick up older chats with LLMs.

Final Words

For the networking ecosystem, this is going to be a big move. NVIDIA’s strategy has been to build bigger and more powerful pieces of silicon to functions in order to make AI Factories run faster. This is not going to be the first 64-core Arm DPU on the market. Patrick has already seen them hands-on so stay tuned to STH over the next week. Still, being one from NVIDIA is a huge deal for the ecosystem just given how much CapEx spend is going into NVIDIA-based clusters.

Editor’s note from Patrick: As a quick bonus coverage, NVIDIA, along with Nokia, announced an AI-native 6G compute platform based on NVIDIA. It may seem like a small footnote, but Justin Hotard is the CEO of Nokia (pictured below) and used to run Intel’s data center business. Intel has traditionally been very strong in this space, so the subtext on this announcement is important.

NVIDIA ARC Ariel RAN Computer For 6G With Nokia