I. Market Overview: Structural Differentiation Amid Iteration Cycles, Rigid Legacy Demand Sustains Consistent Consumption

The global memory market entered an inflection point of DDR5 replacing DDR4 in 2026. Three major overseas vendors including Samsung, SK Hynix and Micron keep slashing DDR4 wafer capacity, reallocating both mature and advanced process nodes to high-margin AI computing memory products such as HBM and DDR5. Nevertheless, DDR4 demand has not shrunk rapidly; instead, a special market landscape has taken shape: gradual phase-out among mass consumer segments, firm support from niche vertical industries, and continuous release of legacy replacement demand.

Overall demand presents a polarized structure. New projects targeting high-end PCs, AI servers and supercomputers fully adopt DDR5, leading to steady declines in new DDR4 deployment demand. Meanwhile, industrial control, automotive electronics, security & networking, legacy equipment upgrades and low-cost entry-level terminals form a long-tail rigid demand segment with stable volume and extended cycles, underpinning overall DDR4 consumption. Industry institutions estimate that global total DDR4 demand will drop roughly 12% year-on-year in 2026, while demand from niche dedicated markets will rise over 18% YoY. The supply-demand gap keeps widening, pushing the central price level upward.

II. Breakdown of Demand from Downstream Segments

(I) Consumer PC Market: Driven Mainly by Legacy Upgrades, New Assembly Demand Continues to Contract

1. Stable Demand for Legacy Host Upgrades

Billions of DDR4-based desktops and notebooks are installed worldwide. A large number of individual users and small & medium enterprises opt to expand memory to extend equipment service life rather than replace complete machines. During the 2026 summer PC sales season, orders for memory upgrades on older platforms surged month-on-month, serving as the core pillar of consumer DDR4 demand. Constrained by tight supply and high prices of DDR5, cost-sensitive customers prefer DDR4 solutions. Leading motherboard manufacturers have restarted long-idle DDR4 motherboard production lines to cater to low-budget assembly markets.

2. Shrinking Demand for New Complete Machines

New-generation Intel Core and AMD Ryzen platforms natively support DDR5, and all brand-new consumer PCs and high-end gaming laptops abandon DDR4 entirely. Only entry-level low-cost thin-and-light notebooks and basic office desktops carry a small volume of DDR4, with annual new shipments declining year after year. Growth in consumer DDR4 relies solely on legacy hardware replacement, with no incremental demand from newly launched devices.

(II) Servers & Data Centers: Tiered Demand, Continuous Procurement by Edge and Lower-Tier Data Centers

1. Hyper-Scale Cloud Operators Fully Shift to DDR5

All newly built clusters of top internet firms and AI computing centers deploy DDR5 RDIMMs for large model training and high-concurrency cloud computing, resulting in nearly zero new DDR4 demand for high-end servers.

2. Mid & Small-Scale IDCs and Edge Inference Servers Maintain Rigid DDR4 Demand

Colocation data centers in second and third-tier cities, on-premise private clouds and lightweight edge AI inference devices have moderate bandwidth requirements and prioritize procurement costs. 64GB/128GB DDR4 RDIMMs can meet basic computing needs for quantitative large models, virtualization and databases, with bulk purchasing costs far lower than DDR5. Mid & small server manufacturers keep locking in long-term supply of DDR4 chips. In addition, stable demand for capacity expansion of legacy servers forms a steady source of enterprise-grade DDR4 consumption.

(III) Industry, Security & Telecommunications: Long Lifecycle Locks Core DDR4 Demand

This segment constitutes the primary growth market for DDR4, featuring three characteristics: long cycle, high stability and low replaceability in the short term.

1. High Barriers in R&D and Certification Cycles

Development and verification cycles for industrial motherboards, PLCs, industrial gateways, network switches and security NVRs last 1–3 years. After solution finalization, manufacturers require a 5–10 year memory supply cycle. Switching to DDR5 mandates rework on software and hardware adaptation as well as high & low temperature reliability testing, incurring substantial costs. Vendors are reluctant to upgrade existing hardware, generating steady long-term procurement demand.

2. Advantages in Harsh Environment Adaptation

Industrial-grade DDR4 boasts mature complete specifications for wide temperature ranges and anti-interference performance, with well-established certification systems for automotive, military and medical equipment. Industrial-grade DDR5 products have not yet achieved large-scale standardized rollout and cannot deliver full replacement in the near term.

3. Sustained Market Expansion

The global niche DRAM market scale expanded from USD 8.5 billion in 2024 to USD 12.2 billion in 2026, with DDR4 accounting for over 70% of niche memory shipments. Demand for industrial control, security and communication equipment maintains steady annual growth.

(IV) Automotive Electronics: Intelligent Transformation Drives Rising DDR4/LPDDR4X Demand

Automotive storage represents the most promising blue-chip growth field for new DDR4 demand:

1. Over 60% of storage solutions in current smart cockpits, domain controllers and onboard monitoring devices adopt automotive-grade DDR4 and LPDDR4X. Per-vehicle memory capacity has risen from 4GB to over 16GB, doubling automotive memory procurement volume per vehicle.

2. Entry-level new energy vehicles and upgraded traditional fuel vehicles prioritize mature, low-cost DDR4 for smart cockpits. While high-level autonomous driving gradually adopts LPDDR5, legacy and low-cost vehicle models continue to consume DDR4 capacity. The automotive-grade DDR4 market achieves an 8.7% compound annual growth rate, with sustained demand extending to around 2030.

3. Vendors allocate most capacity to AI computing products, leading to tight supply of automotive DDR4. Automakers secure long-term supply contracts in advance, further widening short-term supply-demand gaps.

(V) IoT, Smart Home & Medical Devices: Cost-Sensitive Rigid Demand

Facial recognition terminals, smart displays, medical testing equipment and portable IoT terminals have moderate computing power and low bandwidth requirements, so manufacturers prioritize DDR4 to control BOM costs. These devices feature slow iteration speeds with service lifespans of 3–8 years, generating steady recurring replenishment demand that forms dispersed yet considerable long-tail consumption.

III. Core Logic Underpinning Resilient DDR4 Demand

1. Irreversible Capacity Contraction on the Supply Side, Supply-Demand Gap Forces Advance Stockpiling

Samsung, Micron and SK Hynix continuously shut down mature DDR4 production lines. Global effective DDR4 capacity declined over 40% year-on-year in 2026, with vendors terminating all new DDR4 wafer starts and permanently shifting capacity to high-margin HBM and DDR5. Downstream industrial, automotive and server enterprises anticipate persistent supply shortages in the future and proactively build inventory via 3–12 month long-term contracts, temporarily amplifying short-term demand.

2. Significant Time Lag in Platform Iteration, Massive Installed Base of Legacy Hardware

Commercialized since 2014, DDR4 has gained over a decade of market penetration with a vast installed base of PCs, servers and industrial equipment, each with a replacement cycle of 5–10 years. Hardware iteration follows the pattern: new hardware adopts updated memory standards while legacy devices continue consuming older generations. The full cycle for DDR5 to fully replace DDR4 is expected to exceed 10 years, meaning legacy replacement demand will not vanish rapidly in the medium and long run.

3. Cost and Certification Barriers Slow Down DDR5 Penetration

The overall procurement cost of DDR5 chips, matching motherboards and controllers is markedly higher than DDR4. Switching memory specifications for industrial and automotive applications requires heavy re-investment in certification and development, leaving small and medium manufacturers with little incentive to migrate quickly; they prefer to retain mature DDR4 solutions.

4. Domestic Memory Fills Supply Gaps and Unlocks Demand from Low-Cost Markets

ChangXin Memory maintains stable mass production of full-series DDR4 chips, offsetting supply shortages caused by overseas vendors’ production cuts. Steady supply of cost-effective domestic DDR4 sustains procurement demand from low-tier markets and small industrial customers, acting as a critical guarantee for DDR4 consumption.

IV. Phased Forecast of Demand Trends

Short Term (2026–2027): Peak Demand Resilience, Persistent Supply Shortages

1. Consumer segment: Stable demand for legacy PC upgrades and low-cost office desktops, with motherboard manufacturers continuing to release supporting DDR4 capacity;

2. Vertical industries: Rising demand from automotive, industrial control and edge servers, exacerbated shortages from vendor production cuts, and proactive stockpiling by downstream customers keep DDR4 demand at high levels;

3. Structural feature: Spot chips remain undersupplied, the proportion of long-term contracts rises steadily, and prices fluctuate upward.

Medium Term (2028–2030): Gradually Declining Demand, Surviving Only in Niche Specialized Markets

1. New demand for consumer-grade and general server DDR4 will nearly disappear, leaving only replacement demand from legacy equipment;

2. Long-lifecycle equipment including industrial, automotive, medical and military hardware will still purchase DDR4, yet annual procurement volume will shrink year by year;

3. Overseas vendors will gradually complete DDR4 EOL (End-of-Life). Market supply will rely entirely on domestic mature process capacity, transforming DDR4 from a general-purpose product to a purely niche dedicated memory.

Long Term (Post-2030): Phased Out, Limited Circulation Only in Specialized Scenarios

All new projects will completely abandon DDR4. Scattered procurement will only exist for maintenance of legacy hardware, military special equipment and retro devices, with sharply reduced market circulation. DDR4 will officially exit the mainstream memory market.

V. Existing Risks and Constraints on the Demand Side

1. Sustained Price Hikes Suppress Low-End Demand

Production cuts by vendors push up DDR4 prices, prompting low-cost IoT and entry-level PC manufacturers to reduce purchasing volumes, leading to mild shrinkage in low-tier market demand.

2. Falling DDR5 Costs Accelerate Replacement

Over the next 2–3 years, maturing DDR5 processes will drive gradual price declines. Mid & low-tier equipment manufacturers will gradually switch specifications, squeezing medium-to-long-term demand space for DDR4.

3. Risk of Supply Chain Disruption Intensifies Industry Stockpiling Pressure

Overseas major vendors have gradually marked DDR4 as NRND (Not Recommended for New Designs), undermining long-term supply stability. Some customers are forced to accelerate migration to DDR5 solutions, compressing long-term order volumes.

VI. Conclusion

DDR4 market demand will not disappear in the short term; instead, it will gradually retreat from the general mainstream market into a long-tail niche market composed of industrial, automotive, edge computing and legacy hardware upgrade scenarios. 2026–2027 represents the peak prosperity cycle for DDR4, with tight market conditions sustained by contracting supply and rigid procurement across multiple industries. After 2028, demand will decline year by year, gradually exiting consumer and general server segments, and only maintained at a small stable volume by long-cycle specialized hardware until full phase-out in the distant future.

Overall, DDR4 and DDR5 will form a tiered, coexisting market layout. In the short run, DDR4 retains market value supported by legacy hardware and vertical industry rigid demand; in the long run, full-scenario replacement by DDR5 stands as an established industrial trend.