DRAM (Dynamic Random-Access Memory)

DRAM (dynamic random-access memory) is the working memory of computing: a chip that stores each bit as electric charge in a capacitor, refreshed thousands of times per second. Every server, PC, and phone uses it, three companies dominate it, and the AI supercycle made it the core of a memory market WSTS expects to reach $803.9 billion in 2026.

What is DRAM?

DRAM stores each bit as a charge in a tiny capacitor paired with a transistor. The charge leaks, so the chip must refresh every cell continuously, which is the “dynamic” in the name; cut the power and the data is gone. That volatility is the price of speed: DRAM reads and writes far faster than storage, so it holds whatever a processor is actively working on. The product family ranges from the DDR4 and DDR5 modules in servers and PCs to low-power LPDDR in phones, and at the top end, HBM, which is nothing more exotic than DRAM dies stacked vertically and wired wide for AI accelerators. Production is a three-firm oligopoly of Samsung Electronics, SK Hynix, and Micron, with Taiwan’s Nanya Technology the largest independent maker in specialty and consumer niches (Nanya Technology).

How is DRAM used in thematic investing?

DRAM is the base layer of the Asia memory semiconductor concept, and in 2026 it is where the AI supercycle shows up most violently. WSTS projects total memory revenue of $803.9 billion in 2026, up 249.5% from $230.0 billion in 2025, the biggest driver of a $1.51 trillion chip market (WSTS). The leaders converted that into records: SK Hynix earned a 72% operating margin on Q1 2026 revenue of 52.58 trillion won (SK hynix), and Samsung’s chip division produced roughly 93% of a record group operating profit (Samsung). Even the specialty tier moved: Nanya’s DRAM prices rose more than 70% in a single quarter as the majors pivoted capacity to HBM (Nanya Technology). Micron’s chief executive compressed the cycle into one sentence when reporting fiscal Q2 2026 on March 18, 2026:

“Micron set new records across revenue, gross margin, EPS, and free cash flow in fiscal Q2, driven by a strong demand environment, tight industry supply, and our strong execution, and we expect significant records again in fiscal Q3.”

— Sanjay Mehrotra, Chairman, President and CEO, Micron Technology (Micron press release, SEC 8-K exhibit)

The same lever cuts both ways, which is why DRAM pricing is the single most-watched variable in any memory thesis.

Related terms & concepts

FAQ

Who makes DRAM?

Three companies dominate: Samsung Electronics, SK Hynix, and Micron. The two Korean makers lead, and in Q1 2026 both posted records, with SK Hynix at 52.58 trillion won of revenue and a 72% operating margin (SK hynix) and Samsung's chip division earning roughly 93% of a record group operating profit (Samsung). Outside the big three, Taiwan's Nanya Technology is the largest independent maker, focused on specialty and consumer DRAM (Nanya Technology).

How is DRAM different from NAND flash?

DRAM is fast, volatile working memory: it loses its contents when power is cut, so it holds the data a processor is actively using. NAND flash is slower, non-volatile storage that keeps data without power, which is why SSDs are built from it. A server needs both, and the AI build-out is straining both at once, with WSTS projecting total memory revenue of $803.9 billion in 2026, up 249.5% (WSTS).

Why do DRAM prices swing so hard?

Because supply is lumpy and demand is immediate. A new DRAM fab costs billions and takes years, so when demand jumps, as AI servers did in 2025 and 2026, prices carry the whole adjustment: Nanya's selling prices rose more than 70% in Q1 2026 alone (Nanya Technology). When new capacity lands together, the same mechanism works in reverse, which is why DRAM has historically been the most cyclical product in semiconductors.

Sources & references

  1. Global Semiconductor Market Surges Beyond $1.5 Trillion in 2026 (WSTS Forecast) · World Semiconductor Trade Statistics (WSTS), 2026-06-02
  2. SK hynix Reports Q1 2026 Business Results · SK Hynix Newsroom, 2026-04-23
  3. Samsung Electronics Announces First Quarter 2026 Results · Samsung Electronics (Samsung Global Newsroom), 2026-04-30
  4. Nanya Technology Q1 2026 Results Press Release · Nanya Technology Corporation, 2026-04-13
  5. Micron Technology, Inc. Reports Results for the Second Quarter of Fiscal 2026 · Micron Technology, Inc., 2026-03-18