Global memory semiconductor prices reached record highs in September as AI infrastructure investment supported server DRAM demand and suppliers redirected capacity toward servers. DRAM's average fixed transaction price for DDR4 8Gb 1Gx8 rose 4% month-on-month to $26, extending its increase streak to 18 months, while 128Gb 16Gx8 MLC NAND flash rose 0.4% to $30.6 for a 21-month run of gains since January 2025. DRAM transaction volumes declined after third-quarter contract negotiations concluded and procurement discussions shifted to fourth-quarter and next-year volumes. TrendForce raised its fourth-quarter PC DRAM price forecast to a 13%-18% increase from 3%-8% as supply tightens through production shifts toward server memory. NAND prices are expected to remain elevated but stabilize as higher costs limit buyers' ability to absorb further increases.