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[ThePlatform] Intel Shows off 3DXpoint Memory Performance - Page 2

post #11 of 34
Quote:
Originally Posted by Kinaesthetic View Post

I'm 99.99% sure that your wallet does not want it. At least right now.

How much are you expecting it to be?
Quote:
the Optane brand at Intel and which will be available in both main memory DIMM and SSD form factors, will cost somewhere between that of flash and DRAM, too. This gives Optane many attractive attributes both technically and economically to become a popular system component, and we fully expect that it will be just that.
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post #12 of 34
A lot, both flash and DRAM can be extremely expensive so what they're saying is meaningless until we see prices and performance.
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post #13 of 34
Hopefully this brings a price cut to all SSD technology too. Average consumers are going to be quite happy with this. thumb.gif

The more users running cheaper SSDs, the better.
post #14 of 34
Interesting. The article makes it seem like it's not quite as fast as DRAM though, so systems will still benefit from using DDR4 alongside these DIMMs, if you chose to use it in the DIMM configuration.

And when it comes to capacities given the "10 times the density of DRAM" quote, it looks like a 3D XPoint memory based SSD will max out at around 120 -160 GB for now, twice at most if you use both sides of the PCB. And I bet that the price won't be pretty. Then again, that's to be expected.
Edited by tpi2007 - 10/28/15 at 9:34pm
 
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post #15 of 34
Quote:
Originally Posted by tpi2007 View Post

Interesting. The article makes it seem like it's not quite as fast as DRAM though, so systems will still benefit from using DDR4 alongside these DIMMs, if you chose to use it in the DIMM configuration.

And when it comes to capacities given the "10 times the density of DRAM" quote, it looks like a 3D XPoint memory based SSD will max out at around 120 -160 GB for now, twice at most if you use both sides of the PCB. And I bet that the price won't be pretty. Then again, that's to be expected.
How did you come to those conclusions?
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post #16 of 34
The way it is worded makes it sound like it's going to cost in between SSD's and ddr4 ram... but I think that pricing has to do with $/GB... so you will get sizing more closely resembling SSDs but at a much higher $/GB
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post #17 of 34
Quote:
Originally Posted by 2010rig View Post

Quote:
Originally Posted by tpi2007 View Post

Interesting. The article makes it seem like it's not quite as fast as DRAM though, so systems will still benefit from using DDR4 alongside these DIMMs, if you chose to use it in the DIMM configuration.

And when it comes to capacities given the "10 times the density of DRAM" quote, it looks like a 3D XPoint memory based SSD will max out at around 120 -160 GB for now, twice at most if you use both sides of the PCB. And I bet that the price won't be pretty. Then again, that's to be expected.
How did you come to those conclusions?


First conclusion based on this:
Quote:
What this means is that a mix of DDR4 and Optane DIMMs in a two-socket server with a total of 6 TB of addressable memory, “virtually eliminating paging between memory and storage, taking performance truly to a whole new level.”

The second conclusion is based on both the "10 times the density of DRAM" quote and on the biggest DIMM you can buy today, which sits at 16 GB. Now how many of those chips can you fit on a 2.5' SSD PCB? I'd say that if you use both sides of the PCB you'd be able to fit around the equivalent of two DIMMs. So at most you'll get between 256 - 320 GB of very fast storage, which is a good start, albeit an expensive one, if as they say the price will sit between DRAM and SSD price, meaning more expensive than an SSD GB for GB, but less than DRAM (which also implies that it will be slower, although with more capacity).
 
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post #18 of 34
Not just speed but latency will also be a problem as these sticks will have a much higher latency than RAM. But, if they intend to unify this with RAM, eventually these problems will hopefully be resolved.
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post #19 of 34
Quote:
Originally Posted by tpi2007 View Post

First conclusion based on this:
The second conclusion is based on both the "10 times the density of DRAM" quote and on the biggest DIMM you can buy today, which sits at 16 GB. Now how many of those chips can you fit on a 2.5' SSD PCB? I'd say that if you use both sides of the PCB you'd be able to fit around the equivalent of two DIMMs. So at most you'll get between 256 - 320 GB of very fast storage, which is a good start, albeit an expensive one, if as they say the price will sit between DRAM and SSD price, meaning more expensive than an SSD GB for GB, but less than DRAM (which also implies that it will be slower, although with more capacity).

Cool, + Imaginary Rep. thumb.gif

I just read the article more closely, and I can see why you came to those conclusions.

Shouldn't the DIMM's be bigger, if each DRAM chip has 10X density? Or am I reading this wrong?
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post #20 of 34
Quote:
Originally Posted by 2010rig View Post

Cool, + Imaginary Rep. thumb.gif

I just read the article more closely, and I can see why you came to those conclusions.

Shouldn't the DIMM's be bigger, if each DRAM chip has 10X density? Or am I reading this wrong?

It depends, they could be stacking NAND like Samsung.
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