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IBM Readies 32 nm eDRAM with Low Latency

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IBM Readies 32 nm eDRAM with Low Latency

Postby Hans de Vries » Sat Sep 19, 2009 2:59 pm

http://www.semiconductor.net/article/35 ... atency.php

The good news is that IBM has managed to make eDRAM a viable option for Volume manufacturing
as each 45nm Power7 contains a 32MByte eDRAM L3 cache with a tile density of 2 mm2/MByte and
an estimated total address to use latency of ~6 ns.

The 32nm version should be around 1 mm2/MByte. AMD and IBM jointly presented a 1 MB eDRAM
cache (45nm) based on this technology (not Z-ram) at the 2008 VLSI symposium. Is it going to
happen after all those years?


Regards, Hans
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby Game_boy » Sat Sep 19, 2009 3:18 pm

Is there some document that compares SRAM, eDRAM, Z-RAM, and T-RAM?

If eDRAM quadruples the density without adding significant penalties in other areas compared to SRAM, what was the obstacle to using it before? And surely Intel, being the most advanced process technology company in the world, would have thought of this before now?

It certainly looks promising.
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby Hans de Vries » Sun Sep 20, 2009 10:29 pm

Game_boy wrote:Is there some document that compares SRAM, eDRAM, Z-RAM, and T-RAM?


There's a bit in this pdf on page 5

http://www.advancedsubstratenews.com/v6 ... nglish.pdf


These eDRAMs use trench cells for storage:
Image


Regards, Hans
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby rjon » Mon Sep 21, 2009 2:30 pm

For the less technical among us :) the Inquirer has some info on this here...http://www.theinquirer.net/inquirer/news/1534135/ibm-develops-32nm-dynamic-memory

It thinks its eDRAM is comparable to what would be expected of SRAM produced on a 15nm process, three technology generations ahead of chips in volume production today.
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby Pietro sk » Sat Sep 11, 2010 7:36 pm

i am unsure , but i post it here

http://en.wikipedia.org/wiki/FJG
ImageImageImage
looks simple and efficient, will be better than edram?

your opinions, people ? :)
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby AussieFX » Sun Sep 12, 2010 5:27 am

Hans de Vries wrote:
Game_boy wrote:Is there some document that compares SRAM, eDRAM, Z-RAM, and T-RAM?


There's a bit in this pdf on page 5

http://www.advancedsubstratenews.com/v6 ... nglish.pdf


These eDRAMs use trench cells for storage:
Image


Regards, Hans

What's the chance of AMD using this in Bulldozers L3?
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby eaima » Mon Sep 13, 2010 7:39 am

A bit off-topics but IBM is now running at 5.2ghz :shock:

The z196 offers a total of 96 cores running at an astonishing 5.2 GHz, and delivering up to 40% improvement in performance per core and up to 60% increase in total capacity for z/OS, z/VM, and Linux on System z workloads, compared to it's predecessor, the successful z10 EC. The z196 has up to 80 configurable cores for client use. The cores can be configured as general purpose processors (CPs), Integrated Facilities for Linux (IFLs), System z Application Assist Processors (zAAPs), System z Integrated Information Processors (zIIPs), additional System Assist Processors (SAPs), Internal Coupling Facilities (ICFs) or used as additional spares.
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Re: IBM Readies 32 nm eDRAM with Low Latency

Postby eaima » Mon Sep 13, 2010 4:03 pm

While I was looking for further information about eDRAM, I found this (not all new):

-Avalanche photodetector: http://domino.research.ibm.com/comm/research_projects.nsf/pages/photonics.index.html
and on youtube (never thought ibm's diagram were so simplified, and funny): http://www.youtube.com/user/IBMLabs#p/u/6/RWhcwVxI2sQ

and a very interesting related pdf(2008) slightly describing road-runner as well http://www.research.ibm.com/photonics/publications/ecoc_tutorial_2008.pdf


-An all new kind of nano-memmory: http://www.youtube.com/watch?v=dJf3z9AfiVM&feature=related

Does anybody have more data about eDRAM? The only deeper descriptive document I have found is a technical market analysis and is 975$... http://www.memorystrategies.com/report/embeddedram.html

By the way, does the eDRAM from toshiba and all other foundries is the same as IBM is about to launch? Or simply ibm's edram is the lastest generation?
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