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Samsung 840 with TLC Nand

post #1 of 11
Thread Starter 
Hey there,

i just read through some reviews of the Samsung 840 and some other SSDs.

http://www.custompcreview.com/reviews/samsung-840-250gb-ssd-review/15955/
http://www.anandtech.com/show/6337/samsung-ssd-840-250gb-review
http://www.anandtech.com/show/6338/samsung-ssd-840-preliminary-benchmarks
http://thessdreview.com/our-reviews/samsung-840-series-240gb-ssd-review-the-worlds-first-tlc-ssd-takes-the-stage/

I was wondering, why Samsung puts this TLC NAND in the 840 (not Pro). As far as I read, TLC was mainly used for USB flash drives and stuff. But it seems like they did a pretty good job on the 840. The benchmarks for IOPS and reading are over the top. Sure, write speeds are not as good, but I personally thing this isn't a big deal. A system will read much more data than it writes during gaming and working.
I guess the 840 is a good choice for client workloads and since the power efficiency is very good it should also be a good choice for Notebooks and Netbooks.
Hopefully the choice of TLC NAND will result in low prices thumb.gif

What are your opinions?
Edited by steve-n - 10/31/12 at 4:29pm
post #2 of 11
TLC (Triple Level Cell)
post #3 of 11
Quote:
Originally Posted by Sean Webster View Post

TLC (Triple Level Cell)

What he said. We've had MLC (Multi Level Cell) NAND for a long time now and that's why we're already enjoying lower prices (SLC or Single Level Cell costs around 10x per GB what MLC does). The Samsung 840 Pro uses MLC NAND. The Samsung 840 uses TLC NAND.
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post #4 of 11
Thread Starter 
Yeah. maybe I read too much? Got it right!
post #5 of 11
Isn't TLC "bad"?
     
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post #6 of 11
Quote:
Originally Posted by Rookie1337 View Post

Isn't TLC "bad"?

Well, so is MLC in comparison to SLC. Samsung manufactures their own NAND so they've at least got a leg up in terms of quality control. Besides, looking at the Samsung 840 reviews, it appears Samsung was able to tune their controller/firmware quite well for TLC NAND.
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post #7 of 11
Yeah...it looks like it will have 7 years of life for the 200+GB model but does that mean you can't read from it after words or is that just the end of writing to it? I thought SSDs/flash drives were supposed to be readable for a longer time but I might have mixed things up somewhere. redface.gif
     
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post #8 of 11
Thread Starter 
If you ask wiki, it says the memory isn't usable afterwards. So I guess you won't be able to use it, no writing, no reading.
post #9 of 11
Quote:
Originally Posted by Rookie1337 View Post

Yeah...it looks like it will have 7 years of life for the 200+GB model but does that mean you can't read from it after words or is that just the end of writing to it? I thought SSDs/flash drives were supposed to be readable for a longer time but I might have mixed things up somewhere. redface.gif

The SSD should be readable even after you've run out of P/E cycles. Key word here being should. I've yet to see an SSD that actually worked like this.

There's a move to simplify SSD endurance ratings. JEDEC specifications measure endurance in terabytes (total bytes?) written (TBW). For consumer/client SSDs, the SSD should be readable for a period of 1 year after TBW has been exhausted. For enterprise SSDs, data retention requirement is 3 months after TBW has been exhausted.
Edited by rui-no-onna - 11/3/12 at 11:50am
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post #10 of 11
Quote:
Originally Posted by rui-no-onna View Post

The SSD should be readable even after you've run out of P/E cycles. Key word here being should. I've yet to see an SSD that actually worked like this.
There's a move to simplify SSD endurance ratings. JEDEC specifications measure endurance in terabytes written (TBW). For consumer/client SSDs, the SSD should be readable for a period of 1 year after TBW has been exhausted. For enterprise SSDs, data retention requirement is 3 months after TBW has been exhausted.

Alright. Thanks guys. Hmmm....with my HDDs getting louder I'm starting to wonder what to move up to for reliability and speed. So MLC is still the best in life span that we as consumers can get right?
     
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