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HBM1 vs HBM2 vs HBM3 | Difference between HBM1 HBM2 HBM3

This page compares HBM1 vs HBM2 vs HBM3 and mentions difference between HBM1, HBM2 and HBM3.

The HBM stands for High Bandwidth Memory. It is manufactured by Samsung as well as Hynix. It is non-planar type with 3D shape in the form of cube/cuboid. The memory chips are stacked to form cube structure. It occupies less space and hence can be placed near GPU.

HBM memory

It offers many benefits over GDDR memory types such as less power comsumption, smaller size, higher bandwidth, better performance and so on.

HBM1 memory

HBM memory is called as stacked memory or compact memory. The operating speed is about 1 Gbps. Due to its wide bus size, it supports much higher bandwidth compare to GDDR5 memory.

The memory bandwidth can be up to 128 GB/s per stack. It supports 1GB capacity per stack and 4GB per package. Moreover it consumes less power compare to GDDR5 and GDDR5X.

HBM2 memory

It is the second generation of HBM memory which offers higher speed and bandwidth. It consists of 8 DRAM dies per stack with transfer rates up to 2 Gbps.

It supports bandwidth of 256 GB/s per stack due to 1024 bit interface which is double of HBM1. HBM2 offers more capacity than HBM1 which is about 8GB per stack.

Nvidia Tesla P100 card uses HBM2 memory. It is used by various GPU architectures such as Vega, Volta and Pascal.

HBM3 memory

It is successor to HBM2 memory type. It offers more features than HBM2 type. It is faster, consume low power and supports higher capacity compared to HBM2 memory.

It supports 64 GB of VRAM to be used in graphics cards and memory bandwidth of upto 512 GB/s per stack.

Difference between HBM1, HBM2 and HBM3

Following table mentions difference between HBM1, HBM2 and HBM3.

Specifications HBM1 HBM2 HBM3 (Expected)
Density per slice 2 GB 8 GB 16 GB
Maximum speed 1 Gbps 2 Gbps 3.2 Gbps
# of stack / Chip 4 2/4/8 4/8/12/16
Bandwidth/Chip 128 GB/s 256 GB/s 410 GB/s
IO interface CMOS CMOS Low voltage swing interface
Power consumption Lower than GDDR5 and GDDR5X Lower than HBM
Manufacturers Hynix, Samsung, Nvidia Samsung, Hynix
Appearance Cube/ Cuboid Cube/ Cuboid
Graphics cards Radeon R9, Fury X, Radeon Pro Duo Nvidia Tesla P100, Nvidia Quadro GP100, Radeon Rx Vega 56, Radeon Rx Vega 64, Nvidia Titan V, AMD Radeon VII

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