Gadgetcrutches
TRENDING
  • Gaming
  • Gadgets
  • Hardware
  • Viral
  • Article
  • Auto
  • News
  • Humor And Curiosities
No Result
View All Result
SUBSCRIBE
No Result
View All Result
Gadgetcrutches
No Result
View All Result
Home Article

FG-DRAM, NVIDIA’s secret weapon to replace HBM2

by ESHWAR VIJAY T V
December 27, 2020
in Article
Reading Time:3 mins read
282 3
0
FG-DRAM, NVIDIA’s secret weapon to replace HBM2
554
SHARES
1.6k
VIEWS
Share on FacebookShare on Twitter

READ ALSOcheck out

Which graphics have better latency, AMD or NVIDIA?

Which graphics have better latency, AMD or NVIDIA?

April 21, 2021
Ubuntu 21.04 Hirsute Hippo Beta Released

Ubuntu 21.04 Hirsute Hippo Beta Released

April 2, 2021

The FG-DRAM is one of the developments that NVIDIA has in the bedroom in the future, it is a new type of memory that comes to replace the HBM2 as memory for high performance computing. Will we see this type of RAM in the NVIDIA Tesla with NVIDIA Hooper chipset? We don’t know, but for the moment we give you a little introduction.

Usually the way in which conventional RAM has evolved has been by taking advantage of the new manufacturing nodes to get faster memory, in bandwidth, under the same level of consumption, but with quite mild results.

capture 20201227 081628

To explain to you what is the problem of the evolution of RAM with respect to its performance, bandwidth, imagine that we have an interface that transmits 1 GB / s, which has about 64 pins and we want to expand it to support 2 GB / s , for them we have two options:

  • Double the clock speed.
  • Double the number of pins.

Raising the clock speed has the problem that consumption increases exponentially with clock speed and voltage and the worst thing is that to reach certain clock speeds the voltage has to rise, so the increase in consumption would not be 4 times higher, but even higher so that we may run out of enough energy to fuel the memory.

The other option is to increase the number of pins, this makes it necessary less and less clock speed, thereby reducing the voltage and reducing energy consumption. But the problem that this entails is that it is to expand the perimeter of the chip, so it increases its cost, so while it has a better solution for consumption, it is not better in terms of cost.

READ ALSO  Big Holographic 3D Projector by Raspberry Pi

capture 20201227 081731

But the solution to this dilemma came through silicon pathways, to connect the memory interfaces vertically on the interposer in which both the processor and the memory were connected, with this the HBM memory was born, which allowed huge bandwidths, but with much lower power consumption.

But time passes and the HBM memory is falling short in terms of its capabilities since a new type of memory is necessary with a much lower energy consumption. That is why all eyes are on other types of memories such as Fine Grained DRAM.

What is the FG-DRAM?

capture 20201227 081900

In 2017 NVIDIA made a presentation to talk about a type of DRAM called FG-DRAM or Fine Grained DRAM as a replacement proposal for the HBM2, which has been used in NVIDIA Tesla cards since the Tesla P100

The FG-DRAM like the HBM2 is a 2.5DIC type memory with the processor (or processors) on top of an interposer next to the memory stacks. Its strong point? It has the particularity of going from the 3.9 Pj / bit of the HBM2 memory to 2 Pj / bit, so it can offer twice the bandwidth under the same consumption as the HBM2.

From HBM2 to FG-DRAM

capture 20201227 082054

One way to evolve the HBM2 is to simply accept configurations with a higher bandwidth, by placing a greater number of chips in the stack, the problem is that as we are placing more and more chips then the probabilities that all the battery goes bad they trip, this is the reason why we do not see HBM2 memory with more than 4 memory chips per battery.

But the Fine Grained DRAM takes a different path than what has been proposed with the HBM 3 in order to obtain a stack with a bandwidth of 1 TB / s. To do this, the idea is to increase the number of banks in each memory chip, up to a total of 512 simultaneous banks, which can be accessed at a speed of 2 GB / s each.

capture 20201227 082155

Thanks to that. The FG-DRAM memory stack is accessible at 1TB / s for twice the power consumption of the HBM2 at 256GB / s . But since you get four times the bandwidth, this means that the consumption per transmitted bit is cut in half .

Source: FG-DRAM Paper (PDF)
Share222Tweet139Share55
ADVERTISEMENT

Related Posts

Which graphics have better latency, AMD or NVIDIA?
Article

Which graphics have better latency, AMD or NVIDIA?

by ESHWAR VIJAY T V
April 21, 2021
Ubuntu 21.04 Hirsute Hippo Beta Released
Article

Ubuntu 21.04 Hirsute Hippo Beta Released

by gokul nath
April 2, 2021
Is your PC less powerful when using the Wi-Fi connection in gaming?
Article

Is your PC less powerful when using the Wi-Fi connection in gaming?

by gokul nath
April 1, 2021
So are the SSD and RAM and their NAND Flash, what technology will triumph?
Article

So are the SSD and RAM and their NAND Flash, what technology will triumph?

by ESHWAR VIJAY T V
March 26, 2021
Do you really need a 360 Hz monitor? This is what you should know
Article

Do you really need a 360 Hz monitor? This is what you should know

by gokul nath
March 26, 2021
How to Detect a Fake Video Card?
Article

How to Detect a Fake Video Card?

by gokul nath
March 3, 2021
This is the evolution of Intel processors through their history
Article

Why Is Power Consumption So High of Intel Processors?

by gokul nath
February 28, 2021
Load More
Gadgetcrutches

© gadgetcrutches

Check Out

  • Gaming
  • Gadgets
  • Hardware
  • Viral
  • Article
  • Auto
  • News
  • Humor And Curiosities

Follow Us

No Result
View All Result
  • Home
  • Gaming
  • Hardware
  • Gadgets
  • Auto
  • News
  • Technology
  • Entertainment

© gadgetcrutches

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In