NewMoneyMoves
PerspectivesResearchTerminalsWeekend RWABoard
THEME
EnergyGlobal ThemeFront-runBioRoboticsMobilityInfra
››테마 심층
GLOBAL THEME

Big 3 Memory Legacy Exit & Successor Deep Dive

Who Fills the Void — Screening Korean Value Chain Second-Tier Beneficiaries

HHaelangdal·Founder AnalystApril 21, 202632 min read테마 심층
Bottom Line

The Big Three's legacy DRAM/NAND retreat is an irreversible structural pivot — a cycle where China's CXMT/YMTC and Taiwan's Nanya fill the void while Korean second-tier beneficiaries emerge.

NewMoneyMoves

Global Investment through Themes

Content

ThemesIdeasReportsEarnings

Explore

GuideETFsPerspectivesTelegramNVIDIA PortfolioWeekly ReviewCredit & Leverage

Community

Daily News

Legal

Privacy PolicyTerms of ServiceDisclaimer

© 2026 NewMoneyMoves. All rights reserved.

Reader's Brief — 30-second TL;DR

Advanced
Why Now

Supply gaps of DDR4 -60-70%, LPDDR4/4X -40-50%, and MLC NAND -41.7% YoY for 2026-2027 are locked in; HBM conversion costs make a Big Three return economically irrational.

Winners ?? Losers

Beneficiaries — Korea (SK Hynix and Samsung HBM margin defense, SME suppliers, Jeju Semicon fabless), Taiwan (Nanya vertical integration), China (CXMT and YMTC share gains). Pressure — initial legacy spot price decline pressure.

Watch For

Quarterly CXMT/YMTC DDR4 yield disclosures and spot price changes — Chinese follower yields surpassing 70% would signal easing of the supply shock.

Reading depth
  1. 011. Memory Basics: DRAM vs NAND, and the HBM Structural TensionOne HBM stack consumes 2~3x the wafer capacity of standard DRAM, so HBM expansion itself tightens legacy DRAM supply.Jump to section
  2. 022. The Big 3 Individual Retreat PathsThe Big Three move in the same direction at different speeds, with Samsung setting precedent and SK hynix and Micron maximizing price upside before effectively exiting by end-2026.Jump to section
  3. 033. The Supply Gap: Prices Speak FirstThe legacy supply gap is already visible in prices, leaving only the question of who fills it and how fast.Jump to section
  4. 044. Candidate (1): China — Filling the Void by State PushChina's CXMT and YMTC entering the legacy market is a matter of time, with roughly 15% share each a realistic 2027~2028 target.Jump to section
  5. 055. Candidate (2): Taiwan — The Quiet Niche WinnersTaiwan absorbs specialty customers the Big Three abandoned, and NAND giants taking equity in Taiwanese DRAM players signals structural market change.Jump to section
  6. 066. Candidate (3): Japan — The Last NAND CitadelJapan cannot re-enter DRAM but Kioxia can absorb industrial NAND after Samsung's MLC exit, with the Nanya stake positioning for a DRAM-NAND bundle.Jump to section
  7. 077. Korean Investor's Dual-Beneficiary StructureThe right posture for Korean supply-chain investors is a barbell across an HBM-only leg and a CXMT-order leg.Jump to section
  8. 088. Global Capacity Map: Memory BlockificationMemory is no longer a single global market but a regionally blocked one, making the Big 2's block leadership the core monitoring variable.Jump to section
  9. 099. Risks & Deal RadarThe biggest risks are AI capex slowdown and added US sanctions. CXMT's IPO, Samsung's LPDDR4 EOL, and SK Hynix's HBM4 16-high shipments are the key events to watch.Jump to section
  10. 1010. Conclusion — Korean Investor PositioningThe reshuffle's outcome hinges most on three assumptions: CXMT yield, the HBM-versus-legacy profitability ratio, and US-China sanction intensity.Jump to section

1. Memory Basics: DRAM vs NAND, and the HBM Structural Tension

Memory splits into two categories. DRAM is the "workbench" — short-term memory that holds what you're doing right now, disappearing when power is off. NAND is the "warehouse" — long-term memory that stores photos, videos, and apps.

DRAM varies by generation. DDR3 (legacy PC/server), (current mainstream, being discontinued), DDR5 (transitioning to mainstream), LPDDR4/4X (mid-low smartphones, Samsung EOL 2026), LPDDR5/5X (flagship), and HBM3E/HBM4 (AI accelerators). HBM is "ultra-high-speed DRAM" — stacked 8/12/16 high with 1,024 data lanes.

GenerationPrimary UseMax SpeedStatus
DDR4Current PC/server mainstream3.2 GbpsEOL in progress (2026)
DDR5Latest PC/server6.4 GbpsMainstream transition
LPDDR4/4XMid-low smartphones4.3 GbpsSamsung EOL 2026
LPDDR5/5XFlagship smartphones8.5 GbpsMainstream product
HBM3EAI accelerators (NVIDIA H/B200)1,229 GB/sMarket core
HBM4Next-gen AI GPU2,000 GB/sVolume ramp 2026
Generation
DDR4
Primary Use
Current PC/server mainstream
Max Speed
3.2 Gbps
Status
EOL in progress (2026)
Generation
DDR5
Primary Use
Latest PC/server
Max Speed
6.4 Gbps
Status
Mainstream transition
Generation
LPDDR4/4X
Primary Use
Mid-low smartphones
Max Speed
4.3 Gbps
Status
Samsung EOL 2026
Generation
LPDDR5/5X
Primary Use
Flagship smartphones
Max Speed
8.5 Gbps
Status
Mainstream product
Generation
HBM3E
Primary Use
AI accelerators (NVIDIA H/B200)
Max Speed
1,229 GB/s
Status
Market core
Generation
HBM4
Primary Use
Next-gen AI GPU
Max Speed
2,000 GB/s
Status
Volume ramp 2026

The key tension: one HBM stack requires 2–3x the wafer capacity of standard DRAM. The more HBM produced, the less commodity DRAM remains. All three players chose to reallocate finite fab capacity to HBM (3–5x margin) — commodity DRAM has physically become a scarce product.

NAND structure is layered too. SLC (1bit/cell, industrial), MLC (2bit, Samsung EOL June 2026), TLC (3bit, current mainstream), QLC (4bit, growing in AI server SSDs), PLC (5bit, development). The Big 3 are winding down MLC and concentrating on high-layer 3D TLC/QLC.

Takeaway

One HBM stack consumes 2~3x the wafer capacity of standard DRAM, so HBM expansion itself tightens legacy DRAM supply.

Full access requires a free account

Sign in with Google to unlock the full body of every free report instantly.

Sign in with Google

This site runs on ads — the tier system rewards community contributions.

Comments

This report is provided for informational purposes only and does not constitute a recommendation to buy or sell any financial instrument. Investment decisions should be made based on your own judgment and responsibility. The analysis and opinions contained herein are based on information available at the time of writing and are subject to change.

All Reports
Home
Research
Company
Macro
Theme