7 segments · 42 companies · as of Sep 18, 2026
Memory Chips
HBM, DRAM and flash that hold AI models and their working data
Where it sits
Fed by: Chip ManufacturingFeeds: Servers & Systems
AI accelerators need fast local memory, CPUs need large working memory, and storage needs persistent NAND. This theme separates chip makers by product so that HBM leadership is not confused with NAND scale or specialty-memory exposure.
Why now
HBM4 ships for Vera Rubin while HBM4E samples prepare 2027 ramps. Conventional DRAM prices are still forecast to rise 13–18% in Q3, but consumer NAND is cooling. New fabs and packaging plants add supply over years, not in time to end 2026 server shortages.
HBM
HBM DRAM stacks sit beside GPUs. Three volume makers compete on yield and qualification; logic-base-die partners shape HBM4/4E sockets. Chinese DRAM and packaging entrants remain earlier-stage and do not imply qualified Nvidia supply.
Volume 12-high HBM4 for Vera Rubin; 12-high 48GB HBM4E sampled in June, with 16-high HBM4 displayed
leader12-high HBM4 for Vera Rubin uses 1c DRAM and a 4nm base die; 12-high 48GB HBM4E samples shipped in May
leaderVolume 36GB 12-high HBM4 for Nvidia Vera Rubin; 48GB 16-high samples, with HBM4E targeted for 2027
majorFoundry partner for SK hynix HBM4 logic base dies; advanced logic enables custom HBM4E base-die designs
majorCustom HBM architecture co-designed with all three DRAM makers adds compute and I/O to the logic base die
challengerDemonstrated 3nm 12Gbps HBM4 controller/PHY with partner HBM in April; custom-base-die work remains development
challengerReported small-scale HBM3E risk production and Chinese AI-chip testing; 2027 ramp target, no verified volume qualification
emergingReported domestic HBM/TSV fabrication program; no independently verified commercial HBM3E or HBM4 shipments
emergingReported CXMT HBM sample-packaging partner; no verified commercial HBM3E stack volume or Nvidia qualification
emergingXDFOI 2.5D packaging integrates processors with HBM; disclosed integration capability does not establish HBM stack production
niche
Sources: news.skhynix.com, semiconductor.samsung.com, investors.micron.com, reuters.com, counterpointresearch.com
Server DRAM
DDR5 chips, 3DS RDIMMs and MRDIMMs supply server working memory. Qualified module houses assemble purchased DRAM; SOCAMM2 brings LPDDR5X to Nvidia servers. Chip revenue share and third-party module share measure different markets.
DDR5 3DS RDIMMs supply server CPUs; LPDDR5X SOCAMM2 adds removable low-power memory for AI servers
leader1c DDR5, 256GB 3DS RDIMMs and MRDIMMs serve CPUs; 192GB LPDDR5X SOCAMM2 supplies Nvidia Vera Rubin
leaderDDR5 RDIMMs and 32–256GB MRDIMMs serve Intel Xeon 6; 192GB SOCAMM2 is in volume production for Vera Rubin
majorRamps 1B 16Gb DDR5 and validates 1C DDR5; a chip supplier with limited advanced-server module scale
challengerDDR5 chips and server RDIMM offerings target Chinese systems; broad international platform qualification is undisclosed
challengerServer Premier DDR5-6400 ECC RDIMMs offer fixed BOMs, platform validation and published DRAM-die options
majorSMART Modular ships server DDR5 RDIMMs and MRDIMMs; its 12800MT/s MRDIMM range targets bandwidth-limited CPUs
majorIndustrial DDR5-5600 ECC RDIMMs in 16GB and 32GB capacities supply server and workstation memory
nicheDDR5-5600 ECC registered DIMMs use server-grade DRAM for workstation and server working memory
nicheDDR5 ECC RDIMMs span 16–128GB with 6400/7200MT/s options for server and edge-computing systems
nicheServer DDR5 RDIMMs ship; 12800MT/s MRDIMMs were announced in July for Q4 2026 availability
challengerFORESEE Aquila DDR5 RDIMMs reach 96GB at 5600MT/s; SOCAMM/MRDIMM announcements do not imply Nvidia qualification
challengerIndustrial server DDR5 RDIMMs offer ECC registered memory at 4800–7200MT/s
nicheDDR5-6400 RDIMMs span 32–128GB for cloud servers; enterprise offerings pair modules with SSDs
challenger
Sources: micron.com, news.skhynix.com, kingston.com, penguinsolutions.com, trendforce.com, counterpointresearch.com
NAND Flash
NAND dies provide persistent storage inside SSDs and embedded devices. Layer count, wafer bonding, QLC yield and controller integration govern density and cost per bit.
Supplies V9 NAND; introduces 400-plus-layer V10 Bonding V-NAND without claiming volume availability
leaderShips 321-layer QLC NAND in PQC21 SSDs; NAND also feeds its enterprise and Solidigm storage portfolio
leaderG9 NAND supports enterprise SSDs; commercial storage remains after the Crucial consumer exit
majorShips BiCS NAND and samples 332-layer BiCS10 TLC; Sandisk manufacturing ventures extend through 2034
majorCo-develops BiCS NAND with Kioxia; supplies TLC and QLC flash for client and enterprise storage
majorXtacking 4.0 X4-6080 2Tb QLC NAND serves enterprise and client storage applications
challenger
Sources: news.samsung.com, news.skhynix.com, kioxia.com, sandisk.com, ymtc.com, trendforce.com
LPDDR, SOCAMM & GDDR
Low-power DRAM feeds AI server CPUs, edge devices and graphics accelerators. SOCAMM2 adapts LPDDR to serviceable server modules, while GDDR prioritizes accelerator bandwidth.
Ships 192GB LPDDR5X SOCAMM2 for Nvidia Vera Rubin; GDDR7 serves graphics and inference accelerators
leaderMass-produces SOCAMM2; supplies LPDDR5X and GDDR7 for server, mobile and graphics platforms
leaderShips 192GB 1c LPDDR5X SOCAMM2; LPDDR and GDDR products span AI servers and edge devices
majorSupplies LPDDR5X and markets LPDDR6 for mobile and edge devices; no confirmed SOCAMM2 server win
challengerLPDDR4 and LPDDR4X chips serve embedded devices; LPDDR5 remains in trial production
nichePSRAM and low-power DRAM supply memory-constrained edge-AI and IoT devices
nicheLPDDR4/4X and reduced-pin-count RPC DRAM support compact edge-AI memory subsystems
niche
Sources: news.skhynix.com, investors.micron.com, news.samsung.com, cxmt.com, etron.com
Specialty & Legacy Memory
NOR, SLC NAND, DDR3/DDR4 and SRAM hold firmware or working data in embedded and infrastructure devices. Long product lives and supply continuity distinguish these markets from HBM.
Specialty DDR3/DDR4, NOR and SLC NAND serve embedded, networking and edge-AI systems
leaderNOR firmware memory, SLC NAND and proprietary 3D NAND/eMMC serve long-life embedded devices
leaderMaintains DDR4 and specialty DRAM supply as major rivals shift capacity toward HBM and DDR5
majorGD25UF 1.2V NOR, SLC NAND and specialty DRAM target embedded and edge-AI designs
majorVia ISSI, supplies long-life SRAM, specialty DRAM and flash for industrial and automotive systems
majorProvides 2x-nm specialty DRAM and flash foundry services at Hsinchu; DDR4 process upgrades are planned
majorDDR3/DDR4, mobile DRAM and SLC/SPI NAND serve networking and embedded memory requirements
nicheDDR3/DDR4 and RPC DRAM supply networking and edge-AI systems needing customized memory interfaces
nichePSRAM and low-power DRAM supply embedded working memory; AI VHM is a separate developing line
nicheDesigns SLC NAND, NOR, DDR3 and multichip memory packages for embedded and communications products
nicheNOR and EEPROM support embedded code and parameter storage; specialty NAND broadens its portfolio
nicheEEPROM, NOR and SLC NAND retain firmware and configuration in industrial and connected equipment
nicheNOR flash and specialty wafer foundry processes serve industrial, automotive and embedded memory customers
niche
Sources: macronix.com, esmt.com.tw, powerchip.com, gigadevice.com, hkexnews.hk, eng.fmsh.com
China Domestic Memory
Chinese memory makers and designers offer local DRAM, NAND and specialty alternatives. Product capability, production scale and domestic qualification must be separated from HBM ambitions and IPO plans.
Domestic DDR5 and LPDDR production supports Chinese systems; commercial HBM volume supply is not publicly verified
leaderDomestic Xtacking 3D NAND producer; IPO under review, with no confirmed commercial HBM shipment
leaderFabless NOR, SLC NAND and specialty DRAM supply Chinese embedded, industrial and edge-AI devices
majorVia wholly owned ISSI, supplies specialty memory; domestic parent does not make it a commodity HBM vendor
majorLocal SLC NAND, NOR and DRAM designs serve communications, industrial and embedded customers
nicheDomestic NOR and EEPROM designer expanding SLC NAND; no commodity DRAM or HBM role claimed
nicheLocal EEPROM, NOR and SLC NAND products complement its FPGA and security-chip business
nicheNOR flash and specialty wafer foundry; separate from YMTC after the June 2026 control sale, with no confirmed HBM ramp
niche
Sources: sse.com.cn, cxmt.com, ymtc.com, gigadevice.com, hkexnews.hk, static.sse.com.cn
Emerging AI Memory
HBF is an August 2026 OCP specification, not volume silicon. CXL expansion, PIM and flash context tiers tackle AI capacity limits, but broad deployment is unproven. Commercial MRAM coexists with early stacked-DRAM and ReRAM programs.
Co-authors the August 2026 OCP HBF specification with SK hynix; a developing inference-memory standard
leaderCo-develops HBF; CMM-DDR5 expands CXL memory and AiMX remains a GDDR6-AiM PIM prototype
majorCMM-D expands CXL memory; HBM-PIM research and zHBM/zNAND-O concepts target future AI memory tiers
majorVHM/VHMStack uses wafer-on-wafer DRAM; AI accelerator design-ins target new volume ramps in 2027-28
challengerDevelops CUBE and CUBE-Lite stacked DRAM for low-power edge AI; distinct from commodity GPU HBM
emergingShips STT-MRAM for persistent buffers; UNISYST edge-memory engineering samples are planned for Q4 2026
nicheSTT-MRAM supplies persistent industrial and space-grade memory; does not replace high-capacity GPU HBM
nicheLicenses embedded ReRAM to foundries and IDMs; DB HiTek technology qualification is complete
emergingDevelops hafnium-oxide DRAM+ and CACHE+ toward commercialization; no volume AI-memory claim
emergingReports 2026 proof-of-concept results for 3D X-DRAM; X-HBM remains a developing stacked-memory architecture
emergingSAIMEMORY's Intel ZAM research gained NEDO support; prototypes target FY2027 and commercialization FY2029
emergingCo-demonstrated nine-layer DRAM with SAIMEMORY at VLSI 2026; complete ZAM prototypes still target FY2027
emergingSerial and parallel STT-MRAM retain industrial data without power; 16Mb parallel parts are listed in mass production
nicheGP-series XL-FLASH SSD prototypes target GPU memory extension; Gen6 samples planned for late 2026, separate from OCP HBF
emerging
Sources: sandisk.com, news.samsung.com, saimemory.co.jp, americas.kioxia.com, weebit-nano.com, ferroelectric-memory.com
Glossary
- HBM
- Stacked DRAM connected by silicon vias, delivering very high bandwidth beside an AI accelerator.
- NAND
- Nonvolatile flash memory used inside SSDs; it retains data when power is removed.
- MRDIMM
- A server memory module that multiplexes ranks to increase the bandwidth available to its processor.
Heat, spend, exposure and shares are editorial estimates. How to read the map ↗