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花旗:全球半导体_2025 年下半年 GDDR7 推动全球 DRAM 需求上升
2025-06-16 03:16

Investment Rating - The report reiterates a Buy rating on SK Hynix and Samsung Electronics due to expected demand growth in the DRAM market driven by GDDR7 and LPDDR5X [1][6]. Core Insights - The global memory supply shortage is anticipated to intensify in the second half of 2025, primarily due to rising demand for GDDR7 driven by advancements in AI inference models and edge AI devices [1][5]. - GDDR7 is expected to significantly enhance performance with a 2x increase in data rates, reaching 4.8Gbps per pin, and doubling bandwidth capacity to 192GB/s per device [2]. - The demand for GDDR7 is projected to contribute an additional 4.03 billion Gb to global DRAM demand in 2H25, representing a 24% increase in graphic DRAM demand and a 2.4% increase in overall global DRAM demand [4][7]. Summary by Sections GDDR7 Technology - GDDR7 features advanced PAM3 technology, improving data density by 50% per clock cycle compared to GDDR6, while operating at a lower voltage of 1.1-1.2V [2]. - The architecture of GDDR7 utilizes four 8-bit channels, enhancing parallel processing capabilities and reducing latency for AI workloads [2]. AI Inference Demand - The emergence of AI distillation technology is expected to drive significant memory demand for AI inference, leading to increased adoption of GDDR7 as an alternative to HBM [3]. Market Projections - The report projects GPU demand from DeepSeek to reach 2 million units in 2H25, with each GPU requiring 96GB of DRAM, contributing to the overall demand increase [4]. - The anticipated DRAM content upgrade in Apple's iPhone 17 series is expected to add an additional 3.2% to global DRAM demand in 2H25 [4].