Chapter 08 / 16
Memory, HBM, CXL, and DDR5
Memory demand is real, but crowding, capacity expansion, and control-layer profit capture must be separated.
Storage / Memory Bottleneck
Why: AI infrastructure is becoming memory- and storage-hungry beyond HBM. Training and inference create pressure across HBM, DDR5/RDIMM, NAND SSDs, nearline HDDs, CXL memory expansion, storage controllers, and advanced packaging.
Core non-consensus angle: HBM leaders are already widely discussed; the next opportunity may sit in the "boring memory stack" that lets AI factories feed GPUs, host agents, keep context/state, and store generated data cheaply.
US / global listed companies: Micron, Western Digital, Seagate, SanDisk, Pure Storage, NetApp, Astera Labs, Rambus, Marvell, Broadcom.
A-share / China listed companies: Montage Technology, GigaDevice, Longsys, Biwin Storage, DML, Ingenic Semiconductor, Shenzhen Kaifa Technology, Xiangnong Core-Tech, Sino-IC Technology, JCET Group, Tongfu Microelectronics.
Signals: DDR5 server penetration, HBM4 supply, NAND shortage, nearline HDD exabyte growth, CXL memory expansion, memory pooling, SSD controller demand, storage controller ASP, advanced packaging for HBM, domestic DRAM/NAND substitution.
Watch terms: "CXL MXC", "memory pooling", "tiered memory", "nearline HDD", "enterprise SSD shortage", "HBM4", "SOCAMM", "DDR5 RCD", "MRDIMM", "PCIe retimer", "NAND allocation to AI servers".
First deep-dive candidates: Montage Technology, Micron, Seagate, Western Digital, Astera Labs, Rambus, Longsys, Biwin Storage, Shenzhen Kaifa Technology.