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[Engadget] IBM develops memory 100x faster than flash - Page 3  

post #21 of 100
Yea, I don't see us ever hitting DDR4
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post #22 of 100
Quote:
In the past, the technology suffered from the tendency of one of the states to relax and increase its electrical resistance over time, leading to read errors. Another limitation was that each alloy cell could only store a single bit of data. But IBM employees burn through problems like these on their cigarette breaks:

liked this part ... ibm breaking the science barrier in between cigarette breaks
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post #23 of 100
Quote:
Originally Posted by Scrappy View Post
Yea, I don't see us ever hitting DDR4
DDR4 is expected to hit the market at least 2-3 years before this tech.

DDR4 will hit.
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post #24 of 100
what's that catch?
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post #25 of 100
another well done day of work for ibm
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post #26 of 100
This is pretty awesome
 
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post #27 of 100
Quote:
Originally Posted by SectorNine50 View Post
We very well could be seeing the last days of RAM on a computer... I foresee direct-to-drive computing operations in the near future.
phase change memory is still slower than conventional ram. Ram is still a lot faster than PCM. This will be used in conjunction with ram.
post #28 of 100
Quote:
Originally Posted by SectorNine50 View Post
We very well could be seeing the last days of RAM on a computer... I foresee direct-to-drive computing operations in the near future.
DDR4 is going to bring us into the realm of 17+GB/sec per channel, of which most computers will likely have 2-4 channels so we're looking at ~35-70GB/sec of banwdith for most DDR4 rigs, and that's just as a starting point.

The fastest SSD drives provide bandwidths as high as 500MB/sec, but that's absolute best-case scenario, and also over multiple channels. So even if we ignore that and add on 100x faster (again, that factor is also a very likely best-case scenario number) we're still only at 50GB/sec (of which we'd need a new interconnect technology to account for that bandwidth, as PCI-e 3.0 can only provide 16GB/sec over a 16 lanes) which is still less bandwidth than 4 of the slowest DDR4 sticks...which brings us to the true kicker as to why RAM won't be going away anytime soon - latency

While SSDs are an order of magnitude faster than HDDs in access time - microseconds (millionths) vs. milliseconds (thousandths) - RAM is an order of magnitude faster than SSD as RAM latency is measured in nanoseconds (billionths)
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post #29 of 100
One's not enough.....


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post #30 of 100
Quote:
Originally Posted by JuStIn871 View Post
One's not enough.....


I'm too lazy to search for the images. Yes, one isn't enough. Want. I can't wait for this to become standard.
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