SemiAnalysis: Nvidia delays its next-gen AI rack system Kyber NVL144 by 12+ months to 2028 due to PCB manufacturing issues, and cancels its NVL72x2 architecture
NVIDIA's next marquee product — the Kyber rack-scale architecture designed to house its 2027 Rubin Ultra chips …
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Context & Ripple Effects
This report follows earlier coverage of Nvidia product-timing disruptions, including reported Blackwell delays, while Nvidia has continued to lay out a Rubin-family roadmap through products such as Rubin CPX. It shifts the focus from chip design to the manufacturability of the rack-scale system around those chips.
The reported cancellation of NVL72x2 makes this more than a schedule slip: it suggests Nvidia is revising the system architecture intended to carry Rubin Ultra rather than simply moving an unchanged platform down the calendar.
First-order effects
Kyber NVL144's reported move to 2028 delays availability of Nvidia's planned Rubin Ultra rack-scale platform for customers and partners planning around that configuration.
Canceling NVL72x2 removes an intermediate architecture from Nvidia's roadmap, requiring the company and its ecosystem to concentrate on alternative rack designs and resolve the cited PCB manufacturing constraint.
Second-order effects
Cloud providers and other large AI-system buyers may need to extend deployments based on available Nvidia platforms or adjust capacity plans while the Kyber schedule and replacement architecture become clearer.
The delay raises the importance of the rack supply chain—not just GPU availability—because PCB production can constrain delivery of complete AI systems even when the underlying chips are on track.
Third-order effects
If repeated, rack-level integration risk could become a larger determinant of AI infrastructure release cycles than accelerator cadence alone, increasing the value of manufacturers that can reliably deliver dense, complex system assemblies.
Nvidia's roadmap may increasingly need to preserve architectural flexibility between chip generations and deployable rack systems; whether this becomes a persistent pattern depends on how quickly the PCB issue and successor design are stabilized.
The trend: AI computing is moving from a chip-release race toward a rack-scale manufacturing and integration race, where system components can set the effective pace of deployment.
MASSIVE DELAY: Just 3 months after Jensen demoed Kyber NVL144 at GTC, it has faced major setbacks and has been delayed by more than 12 months, pushing it back to 2028. Below, we explain why Kyber has faced massive delays and why NVIDIA's NVL72x2 back-to-back rack architecture was…
Kyber delayed 12+ months and CPO sliding toward the Feynman era, per SemiAnalysis. The copper and pluggable era just got extended by a year or more if true. $AAOI wins cleanest. Their revenue is pluggables, and the tech meant to replace pluggables just slipped again. Their in
1. Bullish for the NPO supply chain. 2. The spec downgrade of NVIDIA Rubin Ultra signals the erosion of NVIDIA's performance moat. 3. Bearish for the CPO supply chain. 4. Big winners: AMD and the TPU ecosystem?
Just for context: last week people were claiming that SemiAnalysis had deliberately reported a CPO delay in order to help launch a fund (as far as I know, they only act as an advisor) that could buy photonics stocks at lower prices. The fund does exist, and now SemiAnalysis is
chips get all the love but the interconnects across all levels from c2c to rack-to-rack are as important, and many chip makers are sleeping on it until very recently. Even most interconnects people just want it to be as transparent as possible, just send and receive the bits with
NVL72x2 back-to-back rack architecture was the new proposed architecture NVIDIA was developing as an alternative to Kyber. It was designed to increase the pure-copper NVLink scale-up world size by placing two Oberon racks back-to-back. However, it has since been cancelled due to …
Nvidia's motto is over promise and under deliver. Many saying this is bullish NPO (under the false premise that Kyber uses CPO) again just people pumping basket of stocks. What this is really telling you is just how poorly run this organization is and how they can't execute on
As the NVIDIA roadmap indicates, CPO NVSwitch will not be available until Feynman. As a result, NVIDIA currently has no proven solution to expand the scale-up world size for Rubin Ultra, leaving a gap for competitors like AMD MI500X or TPUv8i Broadfly to gain scale-up advantages
If this is true, this is a huge red flag for CPO over the coming months. “Kyber NVL144 rack architecture has been delayed to 2028 as the PCB midplane remains challenging from a manufacturability standpoint. NVL576, which connects 8x Oberon racks over CPO between the NVSwitches, […
Kyber NVL144 rack architecture has been delayed to 2028 as the PCB midplane remains challenging from a manufacturability standpoint. NVL576, which connects 8x Oberon racks over CPO between the NVSwitches, is also likely delayed or restricted to small volumes given the current [im…
I'm scheduled to visit NVIDIA next week, so I'll try to look into this in more detail. If SemiAnalysis' latest report is accurate, there may be a lot more we need to consider.
Nvidia's next-gen AI rack system, the Kyber NVL144, has been delayed to 2028, according to SemiAnalysis - two full years behind the annual release cadence the company has trained the market to expect. …
'The prospect of a Kyber NVL144 delay together with other technical challenges are raising uncertainty around Nvidia's next-generation scale-out road map and creating a wider competitive window for alternative AI platforms.' www.bloomberg.com/news/article...