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[Anandtech] IMFT Announce First 20nm MLC NAND for SSDs - Page 3

post #21 of 25
Quote:
Originally Posted by Seeing Red View Post
As predicted the drops in price after each die shrink are becoming smaller. People who are still waiting for $1 per GB will be waiting a little while longer.

Hopefully drive manufacturers tweak their firmware and controllers so we don't get the same misconceptions about the 25nm NAND being less reliable and slower.
Well, there's TLC (triple layer cell) NAND, but I think those are too slow and dies to quickly for SSD use.
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post #22 of 25
Thread Starter 
Quote:
Originally Posted by Ecchi-BANZAII!!! View Post
How would one of those SSD's benefit me that re-writes about 150-200GB per month?
Today I deleted almost 400GB just because I needed some extra space and to delete things I no longer need.
Expect it to be filled before the end of next month.
And my OS drive is reading A LOT as well since I save stuff daily to the desktop\\New folder folders.
150-200GB per month is actually with nominal range. Intel base their numbers on 600GB per month (or 20GB/day). Most people write 3-8GB per day.

I personally write 200-240GB a month.



Quote:
Originally Posted by SgtSpike View Post
What if those same optimizations that were made for the 25nm drives were made for the 34nm drives? Would the 34nm drive still outpace the 25nm drive?

If so, then we're still getting an inferior product moving from 34nm to 25nm.


What if you run a server, but cannot afford an SLC drive? Then 34nm NAND is awesome. And it's being taken away... Oh well, there's always the used drives market if I end up needing another one down the road.

BTW, what do you expect their actual price savings will be in going from 34nm to 25nm?
The issue with the Vertex 2 is two fold....
1) NAND density increased. That means less NAND needed for the same storage space. SSDs derive a lot of their performance from multiple channels accessing multiple NAND chips (like RAID0). With less channels, performance decreases.
2) The controller is unoptimized. Anandtech has a good article discussing this topic.

While 25nm has lower PE cycles, this is just the beginning. The performance of 25nm NAND will get better.

A 4GB 34nm NAND chip is 172mm2.
A 8GB 25nm NAND chip is 167mm2.
That is a 52% decrease in NAND size. In fact, you can get slightly more NAND chips per wafer since you can harvest a few additional chips from the edge. If yields are the same (and they will be eventually), 25nm NAND will lower the price of NAND by up to 50%. This in turn should decrease the price of SSDs by 20-40%.
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post #23 of 25
No more annual 50% price reductions. I wonder what's beyond 20nm if the transistors are too much of a problem smaller than that.

I thought SSDs were supposed to reach the price of optical discs in 2012.
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post #24 of 25
Thread Starter 
Quote:
Originally Posted by BizzareRide View Post
No more annual 50% price reductions. I wonder what's beyond 20nm if the transistors are too much of a problem smaller than that.

I thought SSDs were supposed to reach the price of optical discs in 2012.
Stacked transistors is one technology that will help reduce the cost per/GB. However, I am not sure if it will be a major reduction any time soon.

There are at least a half dozen other promising storage technologies. However, they are all 10 years from mainstream.

Who said SSDs were ever suppose to get that cheap?
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post #25 of 25
Quote:
Originally Posted by DuckieHo View Post
Stacked transistors is one technology that will help reduce the cost per/GB. However, I am not sure if it will be a major reduction any time soon.
I've heard about this I believe. Isn't Intel introducing some sort of transistor-stacking with IB?

Quote:
Originally Posted by DuckieHo View Post
There are at least a half dozen other promising storage technologies. However, they are all 10 years from mainstream.
It sounds like you're telling me that these technologies exist in the server space. Why do they always get tech before us consumers

Quote:
Originally Posted by DuckieHo View Post
Who said SSDs were ever suppose to get that cheap?
You did Well you didn't explicitly state that it would get that cheap but you alluded to SSDs being closer to platter-based drives in 2012.
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