存储涨价延续，关注GB300开始切换：——25年9月台股电子板块景气跟踪

Investment Rating - The report indicates a positive investment outlook for the AI sector, highlighting strong revenue growth and demand across various segments [1][6][12]. Core Insights - The AI spending surge continues, with TSMC reporting a 31% year-on-year revenue increase in September 2025, driven by advanced process technologies [1][6]. - AI accelerator revenues are expected to double in 2025 compared to 2024, with significant contributions from major clients like NVIDIA and AMD [6][12]. - The report emphasizes the strong performance of companies involved in semiconductor testing and packaging, particularly benefiting from collaborations with AI firms [1][8][12]. Summary by Sections AI Sector - TSMC's revenue for September 2025 reached NT$3309.8 billion, with advanced processes accounting for 74% of sales [6]. - AI chip demand is projected to grow significantly, with major clients driving high order visibility [6][12]. Testing and Packaging - Jingyuan Electronics reported a 40% year-on-year revenue increase in September 2025, benefiting from AMD and OpenAI collaborations [8]. - The testing sector is expected to see continued growth, particularly in advanced packaging and AI-related applications [8][12]. EMS and PCB - EMS companies like Hon Hai and Quanta reported revenue growth of 14% and 19% respectively, driven by AI server demand [14][15]. - PCB manufacturers such as Jinxiang and Jingzhu experienced revenue growth rates of 80% and 36% respectively, indicating a strong market for high-end applications [12][18]. Storage and Components - DRAM prices increased by over 40% in Q3 2025, with Nanya Technology reporting a 158% year-on-year revenue increase [18]. - Passive component manufacturers like Yageo saw a 12% increase in revenue, driven by strong AI application demand [18].