Difference between these?

[IAEInferno]

GDDR5, GDDR5X, HBM 1, HBM 2?

 

What's better?

[Guest]

gddr5x because 1080 is using it.

[SnowyMus]

HBM is a bit better than GDDR5X and even moreso than GDDR5, but you aren't going to see any NVIDIA card use HBM right now. All of these standards are still decent, though.

[Godlygamer23]

HBM stands for High Bandwidth Memory and handles things a bit differently. With GDDR5 and GDDR5X, the vRAM is mounted onto the board directly around the GPU with the memory controllers then connected to the chips. HBM however has everything integrated into the GPU package, including the memory chips.

 

The stack-up for HBM is as follows:

Memory chips and GPU(top)

Interposer(middle. It acts as the connection between the GPU and memory. With the memory chips and GPU closer together, bandwidth is increased by a lot.

Package.

 

The great advantage to HBM is that it saves a lot of space. Whereas each chip on GDDR tech is discrete and separate, HBM chips can be stacked on top of one another. Just to give you an idea of how much smaller HBM is, reference the image below.

Spoiler

And here is the stack-up of HBM imaged:

Spoiler

And AMD's Fury X die using HBM:

Spoiler

 

Edited September 22, 2016 by Godlygamer23

[IAEInferno]

Just now, dexxterlab97 said:

gddr5x because 1080 is using it.

 

Just now, Godlygamer23 said:

HBM stands for High Bandwidth Memory and handles things a bit differently. With GDDR5 and GDDR5X, the vRAM is mounted onto the board directly around the GPU with the memory controllers then connected to the chips. HBM however has everything integrated into the GPU package, including the memory chips.

 

The stack-up for HBM is as follows:

Memory chips and GPU(top)

Interposer(middle. It acts as the connection between the GPU and memory. With the memory chips and GPU closer together, bandwidth is increased by a lot.

Package.

 

The great advantage to HBM is that it saves a lot of space. Whereas each chip on GDDR tech is discrete and separate, HBM chips can be stacked on top of one another. Just to give you an idea of how much smaller HBM is, reference the image below.

  Hide contents

 

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And here is the stack-up of HBM imaged:

  Reveal hidden contents

And AMD's Fury X die using HBM:

  Reveal hidden contents

 

 

Smaller is better!