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

post #21 of 34
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

What kind of memory capacity would a 2 socket server board have with standard ram? I don't even know how many memory slots a 2 socket server usually has. 6tb seems like an awful lot crammed onto each stick, do server ram sticks get bigger than 32gb per stick? If there is 8 slots per socket and 32gb sticks that would only be 512 gb of ram total. Is it possible that they can fit half a TB or more per stick? I don't know much about server motherboards maybe some have 24 slots. Even with 24 slots you would still have to fit a boatload per stick to get up to 6tb's.
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post #22 of 34
Quote:
Originally Posted by bigjdubb View Post

What kind of memory capacity would a 2 socket server board have with standard ram? I don't even know how many memory slots a 2 socket server usually has. 6tb seems like an awful lot crammed onto each stick, do server ram sticks get bigger than 32gb per stick? If there is 8 slots per socket and 32gb sticks that would only be 512 gb of ram total. Is it possible that they can fit half a TB or more per stick? I don't know much about server motherboards maybe some have 24 slots. Even with 24 slots you would still have to fit a boatload per stick to get up to 6tb's.

Some boards can have 12 or even 16 slots per socket amounting to 1TB or more RAM.
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post #23 of 34
Thats a lot of memory slots! Still though, 6 tb's with 32 slots would be 192 gb per slot. I just had a look and it appears that 64gb sticks are a thing, they may be getting something like 256 gb or more per stick. This stuff is non volatile right? Is it a possibility to have OS installations on these things stuffed inside ram slots in the future? Maybe these sort of features and the special ram sticks themselves would only be able to be used by server boards with specific chipsets. Exciting none the less!
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post #24 of 34
Quote:
Originally Posted by Liranan View Post

Some boards can have 12 or even 16 slots per socket amounting to 1TB or more RAM.

Yeah exactly, so to have 6 TB RAM, we'd have 16 x 384 GB DIMM's. drool.gif
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post #25 of 34
Quote:
Originally Posted by 2010rig View Post

Yeah exactly, so to have 6 TB RAM, we'd have 16 x 384 GB DIMM's. drool.gif

Considering server boards can be quad socket you're looking at loltastic amounts of RAM and in the future MRAM.
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post #26 of 34
Quote:
Originally Posted by Liranan View Post

Considering server boards can be quad socket you're looking at loltastic amounts of RAM and in the future MRAM.

Lol, well, they said 6 TB on a dual socket board. Most dual socket boards have 16 Memory slots as you mentioned.
http://ark.intel.com/m/products/family/43716/Dual-Socket-Server-Boards

After looking closer found a couple with 24 DIMM slots, with 1.5 TB Max
http://ark.intel.com/m/products/82155/Intel-Server-Board-S2600WT2#@product/specifications

That would be 256 GB DIMM's to get 6TB
Edited by 2010rig - 10/29/15 at 11:32am
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post #27 of 34
So for us desktop users:

In the short run, I'd like to start with having a 1TB M.2 x4 version of this. Early next year? smile.gif Yeah, I can dream.

Then in two years, have a fully integrated/caching RAM system that has 32GB of DDR4 working alongside 1TB of Xpoint DIMMS. You write data into the fast traditional DIMMS, and it auto caches in and out of the XPoint DIMMS. You can straight read from them without much loss of performance, but writes will still be faster to traditional RAM.

Best of both worlds.

Man I can't wait. This is the most exciting new computer technology that I've seen in over 20 years.
post #28 of 34
Quote:
Originally Posted by bigjdubb View Post

Thats a lot of memory slots! Still though, 6 tb's with 32 slots would be 192 gb per slot. I just had a look and it appears that 64gb sticks are a thing, they may be getting something like 256 gb or more per stick. This stuff is non volatile right? Is it a possibility to have OS installations on these things stuffed inside ram slots in the future? Maybe these sort of features and the special ram sticks themselves would only be able to be used by server boards with specific chipsets. Exciting none the less!

Yes, having your OS installation, and all your video files, on DIMMs stuffed into RAM slots is exactly how 3D Xpoint might change how computers work. This would require support in both the memory controller and OS.

I imagine it would be sort of like a NUMA architecture. Some DIMMs are slower non-volatile huge Optane DIMMs while others are fast volatile DDR4 DIMMs and the system has to know which are which and act accordingly, e.g. not using the Optane DIMMs for active running program code and not storing very large data sets on the DDR4 DIMMs.
Quote:
Originally Posted by 2010rig View Post

Lol, well, they said 6 TB on a dual socket board. Most dual socket boards have 16 Memory slots as you mentioned.
http://ark.intel.com/m/products/family/43716/Dual-Socket-Server-Boards

After looking closer found a couple with 24 DIMM slots, with 1.5 TB Max
http://ark.intel.com/m/products/82155/Intel-Server-Board-S2600WT2#@product/specifications

That would be 256 GB DIMM's to get 6TB

The 6TB was with a mix of DDR4 and Optane DIMMs, you still want DDR4 for both its endurance and speed, so the Optane DIMMs will have to offer more capacity than 256 GB.
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.”

Intel and Micron are currently producing 128Gb 3D Xpoint chips, this is the same capacity as dense NAND today. We don't know if each chip is actually the same physical size as a 128Gb NAND chip (they are probably larger) but the physical size is not going to be significantly different from current NAND.
Quote:
Originally Posted by Advil000 View Post

Man I can't wait. This is the most exciting new computer technology that I've seen in over 20 years.

So true! I seriously hope to see this architecture realized in the near future. biggrin.gif
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post #29 of 34
I'm just imagining having 8GB of DDR4 in two slots, and 1024GB of this in the other two. Imagine if we ditch DDR4 so soon! But what a leap it would be. WHat I imagined as a kid is about to come true, the slower and faster main memory systems will merge and become one. Hard Drive and DRAM will merge like here, then next the Caches will be like steps down stairs getting large and slower to take until you reach the speed of the RAM+DRAM. As the steps shrink with progress it becomes a sort of slide cache, no weak points or slow points. Perfect for everything in every way.
Edited by cookieboyeli - 10/29/15 at 2:47pm
post #30 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).

I'm hoping you are reading too much into it. The quote "Taking performance to a whole new level" means speed to me for the most part. If it was just more storage...meh, albeit important for the future of course. I figure if it was slower why bother with the info, and simply stating more storage would have done it.

 

Yeah I'm doubling down on the speed thing. In any case we'll see. :D

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