Shares of Samsung Electronics (KRX:005930) and SK hynix (KRX:000660) closed Monday trading down more than 4%, as new developments surrounding Compute Express Link (CXL) memory technology reignited investor hopes for a secondary boost to AI-related memory demand, even as commercial rollout remains uncertain.
Compute Express Link, or CXL, is a technology that enables memory pooling beyond traditional CPU slots, potentially increasing DRAM capacity per server as AI inference workloads grow. Goldman Sachs (NYSE:GS) projects that monthly AI token usage will reach 120 quadrillion by 2030, a figure 24 times higher than 2026 levels. However, Jim Schneider, the bank's lead semiconductor analyst, noted that investors are concerned about the sustainability of capital expenditures, though improved margins for hyperscalers could provide greater flexibility for increased spending.
According to local media reports, Samsung has moved its CMM-D memory module from the CXL 3.1 standard to CXL 3.2, with mass production scheduled for year-end, though the timeline remains subject to change. Meanwhile, SK hynix showcased a 256GB CXL 3.2 module in June, demonstrating its operation within a pooled-memory server. Samsung's official CMM-D page still references CXL 2.0, noting that more recent standards have not yet reached full commercialization, and the broader ecosystem—including CPUs, switches, and software—is described as still developing.
The available public evidence remains inconsistent. Samsung's tests showed a 1TB memory pool delivering up to 92% of DRAM speeds when using eight GPUs, while SK hynix's ITME demonstration boosted throughput by as much as 35.7%. However, these benchmarks cannot be directly compared due to varying workloads, baselines, and system architectures.
Based on publicly available information, SK hynix's hardware validation for CXL 3.2 appears more transparent, though this does not necessarily indicate a lead in shipment numbers or earnings. Samsung's test highlights a wider bottleneck, requiring a tailored kernel, adjustments to LMCache, and pinned memory. Software maturity could ultimately determine when revenue begins to materialize.
The CXL 3.2 specification focuses on monitoring, security, and support by operating systems, with the hot-page unit enhancing memory tiering. Investors are advised to distinguish between specification versions and bandwidth claims at the module level.
The KOSPI ended down 4.46% at 6,516.27. Samsung closed at 244,000 won, while SK hynix ended at 1,764,000 won. Between July 10 and July 16, Samsung declined by 10.5%, SK hynix slipped 15.5%, and the KOSPI lost 8.8%. Trading was halted on Friday for Constitution Day.
Alphabet (NASDAQ:GOOGL) is set to report results on Wednesday, with Intel (NASDAQ:INTC) following on Thursday. Expectations for AI investments and chip platform outlook are likely to put the wider case for CXL demand under scrutiny. Kevin Mahn at Hennion & Walsh cautioned that any reduction in spending by Alphabet could cause ripple effects across the entire AI ecosystem.
Risks remain: CXL sales could decline if host CPUs, switches, or software fall behind. All performance data is based on company or prototype testing and does not demonstrate actual customer revenue. To investors, CXL represents a medium-term option for capacity rather than an immediate replacement for HBM. Any re-rating will depend on customer qualification, volume outlook, and reported sales figures.
