Shares in the printed circuit board (PCB) sector are experiencing another wave of selling pressure. At the time of writing, HANS CNC (03200) has dropped 4.91% to HK$141.5. KINGBOARD HLDG (00148) is down 4.0% at HK$85.5. Victory Giant Technology(Huizhou) Co.,Ltd. (02476) has fallen 3.75% to HK$261.8. Delton Technology (Guangzhou) Inc. (01989) has declined 3.47% to HK$147.6. KB LAMINATES (01888) is lower by 3.25%, trading at HK$74.45.

The market movement follows a recent report from analysis firm SemiAnalysis on social media. The report suggested that NVIDIA's next-generation AI server rack architecture, codenamed Kyber, could be delayed by over a year due to manufacturing complexities. In response to these rumors, NVIDIA issued a statement on Monday, July 6, Eastern Time, stating that its product roadmap remains unchanged and denying that core progress has been affected.

Despite the company's denial, the news has triggered a significant sell-off in shares of Asian PCB manufacturers, including those in Japan and South Korea. NVIDIA has not disclosed specific progress details for its Kyber NVL144 project nor confirmed any delays. Market observers note that during periods of high investment in AI infrastructure, even unofficial and unverified supply chain rumors can have an outsized impact on market sentiment.

It is important to note that the SemiAnalysis report primarily attributed the potential delay to complexities in the PCB manufacturing process. The core issue reportedly involves bottlenecks in the manufacturability of multi-layer printed circuit boards, making it difficult to advance the entire rack-level system as originally planned. The analysis also pointed out that NVIDIA currently lacks a proven, scalable solution for the expansion challenges within its Rubin Ultra architecture.