# HBM Tracker

> HBM Tracker logs 42 HBM stacks from SK hynix, Samsung and Micron, from the first four-high HBM to sixteen-high HBM4E. Production stacks top out at 36GB and twelve layers, and Samsung’s HBM4 reaches 3.3 TB/s per stack. Samples already hit 48GB and 16 Gb/s per pin. Every figure links its source, with the accelerators each maker confirms.

The memory behind the compute. 42 parts, each field linked to its public source, last verified 2026-11-11.
When citing, link the canonical HTML page.

## Data
- [HBM tracker](https://hbmtracker.com/): the full comparison table
- [Data (JSON)](https://hbmtracker.com/data.json): every record with sources
- [Data (CSV)](https://hbmtracker.com/data.csv): one row per part
- [Methodology](https://hbmtracker.com/methodology/): what each field means and how it is verified

## Parts
- [Micron HBM2E 16GB](https://hbmtracker.com/micron-hbm2e-16gb/): The 8-high configuration documented in Micron’s HBM2E technical brief.
- [Micron HBM2E 8GB](https://hbmtracker.com/micron-hbm2e-8gb/): The 4-high configuration documented in Micron’s HBM2E technical brief.
- [Micron HBM3E 24GB](https://hbmtracker.com/micron-hbm3e-24gb/): Micron’s eight-high HBM3E is linked to NVIDIA H200 and Blackwell platforms.
- [Micron HBM3E 36GB](https://hbmtracker.com/micron-hbm3e-36gb/): Micron’s twelve-high HBM3E is designed into NVIDIA Blackwell Ultra and AMD MI355X platforms.
- [Micron HBM4 36GB](https://hbmtracker.com/micron-hbm4-36gb/): Micron’s volume-shipping HBM4 stack is designed for NVIDIA Vera Rubin.
- [Micron HBM4 48GB](https://hbmtracker.com/micron-hbm4-48gb/): Micron’s sixteen-high HBM4 sample increases capacity per placement over its twelve-high product.
- [Samsung 12-layer TSV · 24GB](https://hbmtracker.com/samsung-hbm2-24gb-prototype/): A twelve-layer HBM packaging development announced before Samsung’s later HBM3 products.
- [Samsung Aquabolt 8GB](https://hbmtracker.com/samsung-hbm2-aquabolt-8gb/): The second Samsung HBM2 revision raises the stated pin speed over the first-generation package.
- [Samsung Flashbolt 16GB](https://hbmtracker.com/samsung-hbm2e-flashbolt-16gb/): Samsung’s eight-layer HBM2E package uses denser DRAM dies than Aquabolt.
- [Samsung HBM2 4GB · first generation](https://hbmtracker.com/samsung-hbm2-flarebolt-4gb/): Samsung’s 4-die HBM2 package, before the Aquabolt revision.
- [Samsung HBM2 8GB · first generation](https://hbmtracker.com/samsung-hbm2-flarebolt-8gb/): Samsung’s 8-die HBM2 package, before the Aquabolt revision.
- [Samsung HBM3 16GB](https://hbmtracker.com/samsung-hbm3-16gb/): Samsung’s 8-high HBM3 capacity option for accelerator integration.
- [Samsung HBM3 24GB](https://hbmtracker.com/samsung-hbm3-24gb/): Samsung’s 12-high HBM3 capacity option for accelerator integration.
- [Samsung HBM3E 24GB](https://hbmtracker.com/samsung-hbm3e-24gb/): Samsung’s 8-high HBM3E option, using the current public portfolio rating.
- [Samsung HBM3E 36GB](https://hbmtracker.com/samsung-hbm3e-36gb/): Samsung’s 12-high HBM3E option, using the current public portfolio rating.
- [Samsung HBM4 24GB](https://hbmtracker.com/samsung-hbm4-24gb/): The 24GB capacity option described in Samsung’s commercial HBM4 announcement.
- [Samsung HBM4 36GB](https://hbmtracker.com/samsung-hbm4-36gb/): The 36GB capacity option described in Samsung’s commercial HBM4 announcement.
- [Samsung HBM4 48GB](https://hbmtracker.com/samsung-hbm4-48gb/): The planned sixteen-layer expansion of Samsung’s HBM4 line.
- [Samsung HBM4E 32GB](https://hbmtracker.com/samsung-hbm4e-32gb/): A planned 8-layer capacity extension named in Samsung’s HBM4E sample announcement.
- [Samsung HBM4E 48GB](https://hbmtracker.com/samsung-hbm4e-48gb/): Samsung’s twelve-layer HBM4E sample with a denser DRAM stack.
- [Samsung HBM4E 64GB](https://hbmtracker.com/samsung-hbm4e-64gb/): A planned 16-layer capacity extension named in Samsung’s HBM4E sample announcement.
- [SK hynix HBM · 4-high](https://hbmtracker.com/sk-hynix-hbm-4h/): The original four-layer HBM generation developed with AMD. The historical record connects the technology to the Fiji GPU family.
- [SK hynix HBM2 2GB · 1 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-2gb-1g/): A 2-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1 Gb/s bin carries the presentation’s stated 128 GB/s bandwidth.
- [SK hynix HBM2 2GB · 1.6 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-2gb-1p6g/): A 2-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1.6 Gb/s bin carries the presentation’s stated 204 GB/s bandwidth.
- [SK hynix HBM2 2GB · 2 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-2gb-2g/): A 2-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 2 Gb/s bin carries the presentation’s stated 256 GB/s bandwidth.
- [SK hynix HBM2 4GB · 1 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-4gb-1g/): A 4-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1 Gb/s bin carries the presentation’s stated 128 GB/s bandwidth.
- [SK hynix HBM2 4GB · 1.6 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-4gb-1p6g/): A 4-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1.6 Gb/s bin carries the presentation’s stated 204 GB/s bandwidth.
- [SK hynix HBM2 4GB · 2 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-4gb-2g/): A 4-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 2 Gb/s bin carries the presentation’s stated 256 GB/s bandwidth.
- [SK hynix HBM2 8GB · 1 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-8gb-1g/): A 8-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1 Gb/s bin carries the presentation’s stated 128 GB/s bandwidth.
- [SK hynix HBM2 8GB · 1.6 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-8gb-1p6g/): A 8-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 1.6 Gb/s bin carries the presentation’s stated 204 GB/s bandwidth.
- [SK hynix HBM2 8GB · 2 Gb/s](https://hbmtracker.com/sk-hynix-hbm2-8gb-2g/): A 8-die HBM2 configuration in SK hynix’s Hot Chips product lineup. This 2 Gb/s bin carries the presentation’s stated 256 GB/s bandwidth.
- [SK hynix HBM2E 16GB](https://hbmtracker.com/sk-hynix-hbm2e-16gb/): The 8-high HBM2E option in SK hynix’s published portfolio, intended for AI and HPC integration.
- [SK hynix HBM2E 8GB](https://hbmtracker.com/sk-hynix-hbm2e-8gb/): The 4-high HBM2E option in SK hynix’s published portfolio, intended for AI and HPC integration.
- [SK hynix HBM3 16GB](https://hbmtracker.com/sk-hynix-hbm3-16gb/): The eight-layer HBM3 stack announced for NVIDIA’s Hopper generation.
- [SK hynix HBM3 24GB](https://hbmtracker.com/sk-hynix-hbm3-24gb/): The twelve-layer HBM3 stack adds capacity while retaining the predecessor’s package height.
- [SK hynix HBM3E 24GB](https://hbmtracker.com/sk-hynix-hbm3e-24gb/): The eight-layer HBM3E production stack, with higher current portfolio ratings than the original launch.
- [SK hynix HBM3E 36GB](https://hbmtracker.com/sk-hynix-hbm3e-36gb/): The twelve-layer HBM3E stack appears in SK hynix’s demonstration of NVIDIA GB300.
- [SK hynix HBM3E 48GB](https://hbmtracker.com/sk-hynix-hbm3e-48gb/): A sixteen-layer HBM3E development shown publicly at CES, distinct from the production twelve-layer stack.
- [SK hynix HBM4 24GB](https://hbmtracker.com/sk-hynix-hbm4-24gb/): The 8-layer HBM4 configuration in SK hynix’s published portfolio, with a foundry logic base die.
- [SK hynix HBM4 36GB](https://hbmtracker.com/sk-hynix-hbm4-36gb/): The 12-layer HBM4 configuration in SK hynix’s published portfolio, with a foundry logic base die.
- [SK hynix HBM4 48GB](https://hbmtracker.com/sk-hynix-hbm4-48gb/): The 16-layer HBM4 configuration in SK hynix’s published portfolio, with a foundry logic base die.
- [SK hynix HBM4E 48GB](https://hbmtracker.com/sk-hynix-hbm4e-48gb/): The twelve-layer HBM4E sample raises per-stack capacity and the published maximum pin rate.

## Generation groups
- [HBM, HBM2 & HBM2E](https://hbmtracker.com/generations/legacy/): Where stacked DRAM started: 1 Gb/s four-high HBM in AMD Fiji, then HBM2 and HBM2E up to 16GB, 3.6 Gb/s and 460 GB/s per stack.
- [HBM3](https://hbmtracker.com/generations/hbm3/): The memory behind NVIDIA H100: 16GB eight-high and 24GB twelve-high HBM3 stacks at 6.4 Gb/s and 819 GB/s, by maker.
- [HBM3E](https://hbmtracker.com/generations/hbm3e/): HBM3E powers NVIDIA H200, Blackwell and AMD MI350: 24GB and 36GB stacks at 9.2 to 9.6 Gb/s and about 1.2 TB/s, with every confirmed design-in.
- [HBM4 & HBM4E](https://hbmtracker.com/generations/hbm4/): HBM4 doubles the interface to 2,048 bits and moves the base die to logic processes. Production stacks reach 36GB and 3.3 TB/s; HBM4E samples hit 48GB and 3.6 TB/s.
- [Stack-height timeline](https://hbmtracker.com/timeline/): dated evidence, generated at build time

## Optional
- [All records in one file](https://hbmtracker.com/llms-full.txt)
- [Sitemap](https://hbmtracker.com/sitemap.xml)