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SK hynix HBM4

The world's first HBM4, with development completed and mass production readiness declared in September 2025 on a 2,048-bit interface running above 10 Gbps. It targets Nvidia's Rubin-platform AI accelerators ramping in 2026.

GlobalShippingSK hynixHBM4 familyLaunched 2025-091b-nm (fifth-generation 10nm-class DRAM)

Latest observation ~$550 (per stack (HBM4 12-Hi estimate)) as of 2026-08 · researched 2026-08-27

~$550latest observation · analyst estimate · 2026-08
4dated price observations on record
5sourced specs (all linked below)

Specifications

Sourced specs

SpecValueSource
Interface2,048-bit (doubled from 1,024-bit of HBM3E), per JEDEC HBM4 standard (April 2025)via news.skhynix.com2025-09-12
SpeedOver 10 Gbps operating speed, exceeding the JEDEC standard of 8 Gbpsvia news.skhynix.com2025-09-12
Memory bandwidthOver 2 TB/s per stack (2048-bit at 8-10+ Gbps)via en.wikipedia.org2025-09
Power efficiencyMore than 40% improved vs previous generationvia news.skhynix.com2025-09-12
Process node1bnm (fifth-generation 10nm-class) DRAM; Advanced MR-MUF packagingvia news.skhynix.com2025-09-12

Pricing

Price history, newest first

$486$523$560$5972025-112026-08~$560 per stack · 2025-11-27 · Reported contract · via Digitimes; EEWorld reports ~$560 (~KRW 800,000) agreed with Nvidia~$550 per stack (HBM4 12-Hi estimate) · 2026-08 · Analyst estimate · via Silicon Analysts HBM pricing tracker

Step chart of per-unit observations (system and order totals stay in the table). The line is drawn in USD at each observation year's average FX rate so mixed-currency histories read as one trend; hover any point for the price exactly as reported.

DatePriceTypeSourceConfidence
2026-08~$550 per stack (HBM4 12-Hi estimate)HBM4 12-Hi 36GB estimated $500-600+ per stack, +55-70% vs HBM3E, ramping for Nvidia Vera RubinAnalyst estimatevia Silicon Analysts HBM pricing trackerlow
2026-07-12~$2 per Gb (HBM4, 2H 2026)HBM4 about $2 per Gb in 2H 2026Reported contractvia Digitimes via Seoul Economic Dailymedium
2026-07-12~$5 per Gb (HBM4, 2027 expectation)HBM4 prices expected to roughly double to $4-5+ per Gb next year (2027); 2027 supply prices to be finalized around Q4 2026Analyst estimatevia Digitimes via Seoul Economic Dailylow
2025-11-27~$560 per stackSK hynix HBM4 price 'around the mid-US$500 level' for Nvidia supply; EEWorld (https://en.eeworld.com.cn/news/manufacture/eic712925.html) reports the final settled price at approximately $560 per stack, ~50-60% above HBM3EReported contractvia Digitimes; EEWorld reports ~$560 (~KRW 800,000) agreed with Nvidiamedium

vendor-official or multiple independent reports · single major report or several secondary · estimate or lone secondary source

Prices in USD, converted at each observation year's average exchange rate; the original figure and rate print under every converted price. How prices are sourced and graded ↗

Context

Notes

  • Capacity per stack not stated in SK hynix's September 2025 announcement (12-Hi 36GB configurations widely reported for the Rubin ramp, not vendor-confirmed)
  • UBS projects SK hynix at ~70% of Nvidia's HBM4 supply for Rubin in 2026

Where it sits

In the stack

All specs and prices link to their original sources, dated as observed. Figures are market observations, not offers; treat each as of its date.