SK hynix HBM · 4-high

MakerMemory manufacturer.

SK hynix1

GenerationMaker’s HBM generation designation.

HBM1

DRAM layers highDRAM dies in the stack; excludes the base die.

41

Stack capacity GBCapacity of one stack, in the maker’s GB units; not accelerator total memory.

Not published

Pin rate Gb/sPublished pin rate. Read with Pin qualifier; a limit is not a guaranteed operating point.

13

Stack bandwidth GB/sPublished bandwidth of one stack. Read with Bandwidth qualifier. TB/s is normalized to GB/s using 1,000.

Not published

Interface bitsData I/O width of one stack; not the complete accelerator bus.

Not published

Base diePublished base/buffer die implementation or foundry. Null means not disclosed in the cited evidence.

Not published

DRAM processVendor’s process label, not a normalized physical dimension.

Not published

Bonding / packagePublished stacking or package process.

Not published

Evidence statusLast supported milestone; historical production does not imply current orderability.

Historical catalog1

Status evidence dateDate of the supporting publication, with original precision (YYYY, YYYY-MM or YYYY-MM-DD). Not necessarily the first shipment day.

20141

Sample evidence datePublication confirming samples, preserving date precision; not an inferred qualification date.

Not published

Production evidence datePublication confirming production or shipments. A report date, not an exact factory ramp date.

Not published

Confirmed platform linksPlatforms explicitly linked to this maker and variant by a first-party source. Design-in is distinguished from shipping.

AMD Fiji (Radeon R9 Fury X)2

Reading notesVariant-specific context, source conflicts, historical status and unconfirmed details.

SK hynix puts first-generation HBM at 1 Gb/s per pin, which matches Fiji’s 512 GB/s over a 4,096-bit interface. A separate SK hynix retrospective quotes around 1,600 Mb/s. The retrospective dates the AMD collaboration to 2014; SK hynix’s heritage timeline separately dates initial TSV HBM development to December 2013. No bandwidth or capacity is inferred.1

1. SK hynix: SK hynix HBM · 4-high accessed 2026-11-11
2. AMD: Fiji and memory partner SK Hynix accessed 2026-11-11
3. SK hynix: first-generation HBM at 1 Gb/s per pin accessed 2026-11-11

Every date is the publication date of the maker’s evidence. See who packages, bonds and tests SK hynix HBM on HBM Suppliers. Read the method or send a correction.