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Samsung Electronics has announced that it had started mass producing the industry’s first 64GB DDR4 registered dual Inline memory modules (RDIMMs) that use three dimensional (3D) “through silicon via” (TSV) package technology. The new high-density, high-performance modules are designed for next-generation enterprise servers and cloud-based applications.

The new RDIMMs include 36 DDR4 DRAM chips, each of which consists of four 4Gb DDR4 DRAM dies. The low-power chips are manufactured using Samsung’s 20nm-class process technology and 3D TSV package technology. The 64GB DDR4 modules are rated to run at 2133MHz. The modules are compatible with next-generation servers based on the Xeon E5 "Haswell-EP" chips.

To build a 3D TSV DRAM package, the DDR4 dies are ground down as thin as a few dozen micrometers, then pierced to contain hundreds of fine holes. They are vertically connected through electrodes that are passed through the holes. As a result, the new 64GB TSV module performs twice as fast as a 64GB module that uses wire bonding packaging, while consuming approximately half the power.

Since DDR4 DRAM architecture supports a limited amount of RDIMMs per channel, in order to boost amount of memory inside future servers it will be needed to increase capacity of memory modules. Since 16Gb DRAM devices are not even on horizon, TSV technology will be used to create stacked memory chips with 32Gb, 64Gb or higher capacity. Samsung believes that it will be able to stack more than four DDR4 dies using its 3D TSV technology, to create even higher density DRAM modules. This will accelerate expansion of the premium memory market, in line with an acceleration of the transition from DDR3 to DDR4 throughout the server market.

“Samsung is reinforcing its competitive edge in the DRAM market with its new state-of-the-art solution using its 3D TSV technology, while driving growth in the global DRAM market,” said Jeeho Baek, vice president, memory marketing, Samsung Electronics. “By introducing highly energy-efficient DDR4 modules assembled with 3D TSV, we’re taking a big step ahead of the mainstream DDR4 market, which should dramatically expand with the expected introduction of next-generation CPUs in the second half of this year.”

According to a research report from Gartner, the global DRAM market is expected to reach U.S. $38.6 billion and 29.8 billion units (1Gb equivalent) by year-end. Gartner also predicted that the server market will account for more than 20% of DRAM production this year with approximately 6.7 billion units (1Gb equivalent).

Tags: Samsung, DDR4, DRAM, 64Gb, 2133MHz, 2.13GHz, TSV, Intel, Xeon, Haswell-EP

Discussion

Comments currently: 4
Discussion started: 08/28/14 08:07:29 PM
Latest comment: 09/11/14 08:51:25 AM
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1. 
And Latencies?
1 0 [Posted by: Rollora  | Date: 08/28/14 08:07:29 PM]
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2. 
DRAM Latencies don't have any significant impact on DDR3 or DDR4 system performance for most applications because DDR3 RAM running at 1600 MHz. or higher is not a system bottleneck on a laptop or CPU powered desktop. Even for an APU there is only minute differences between frequencies up to approx. 2133 MHz. where the gains drop off.

As the link below shows the real time stays about the same as the DRAM frequency increases thus more clock cycles are required to match the same real time because the clock cycles are shorter as the frequency increases.

http://en.wikipedia.org/wiki/DDR3_SDRAM

DDR4 is primarily designed for server applications. The faster frequencies aren't of any advantage for the foreseeable PC future. It's a solution for a non-existent problem that may develop 5-10 years down the road. The increased density is of value in servers however.

All of the DRAM makers are hyping DDR4 to try and generate sales in a world wide economic depression that has hurt PC sales. It's too bad there is really no need for this technology for years.
2 0 [Posted by: beenthere  | Date: 08/28/14 10:16:16 PM]
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It may be that in the current situation, but you are ignoring the fact that maybe it will enable designers of other parts to exploit this extra bandwidth.
An easy example, bigger APUs. Current graphics cards require tremendous bandwidth if they are big enough. Also more aggressive prefetching could be another application.

And who knows what else. If DDR4 is there with high bandwidth potential, I am sure they will find a way to use it.
0 0 [Posted by: redhavoc  | Date: 09/01/14 04:21:55 AM]
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