Tradeoffs Between GDDR6 and HBM2

[cageymaru]

Steven Woo, Rambus fellow and distinguished inventor, talks about why designers choose one memory type over another. Applications for each were clearly delineated in the past, but the lines are starting to blur. Nevertheless, tradeoffs remain around complexity, cost, performance, and power efficiency.

 

[Riccochet]

Steven

 

[clockdogg]

Dang, now I need to buy a data-center to hang with the cool tech kids. Kyle's $500k entry level Intel gaming box was just the...entry level.

 

[lostin3d]

Thanks Cagey! Really enjoyed watching this and it was nice to learn about HBM2 on a level I can understand. His visual on the board really kept it simple.

 

[bizzmeister]

Very cool video, thanks for sharing!

 

[whateverer]

Excellent discussion on PHY die space, and bus power usage.There definitely is a future in HBM.

But he doesn't highlight the fact that the memory chips use the exact same amount of power, But the I/O power is usually around 25% of the total power used by the memory subsystem, so you're looking at saving 10-20w vs 256-bit GDDR6, and 20-30w versus 384-bit GDDR6.

This is the reason AMD sticks with HBM2 for their Radeon VII: they would have a hard time adding 30 more watts to the mix, and still getting design wins.

 

[viivo]

Thanks. All the videos on that channel are informative and relatively easy to follow for non-engineers.

 

[c3k]

Great vid. Great link.

Thanks.