HBM

HIGH BANDWIDTH
MEMORY

Stacked DRAM. TSV links. Built for GPUs.

AI doesn't want more RAM. It wants more bandwidth.

GPU with Micron HBM3E 8-high stacked memory showing TSV connections

What is HBM?

HBM is DRAM stacked vertically to keep data paths short and wide.

HBM architecture schematic showing GPU, silicon interposer, package substrate, DRAM dice, TSVs, and solder balls

Build the Stack

Add layers. Watch bandwidth climb.

Micron HBM4 chip with visible gold circuitry

Bandwidth Meter

Warm-up

841

Shorter paths.

1die stacked