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Asynchronous vs. Synchronous NAND Flash SSD Performance

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  • #16
    Re: Asynchronous vs. Synchronous NAND Flash SSD Performance

    Well, it is about 1:45AM CST, 12/22/2012 and all is well. Yet another "impending" apocalypse that fizzled, how many have I lived through in my lifetime?

    Regarding this:

    INTEL 330 180GB
    NAND: Asynch(?)
    Low Price: $89.95
    High Price: $149.50


    There is no chance the Intel 330 uses asynchronous NAND. The last time Intel used async NAND was in their G2 SSDs, like the X-25 M series, which used ONFI 1.0 Async NAND chips. They were introduced in July, 2009, the 80GB version cost ~$225.

    I'm surprised that Async NAND is still manufactured, given the current ONFI standard of 2.0, and 3.0 will be seen in 2013. Perhaps it is used for other purposes. Any SSD manufacture using Async NAND today may be using NOS (New Old Stock) NAND, which I would think would be cheap. OTOH, prices of the older 34nm NAND chips was much higher than the newer 2Xnm chips, so you can find seemingly strange pricing on older SSDs, like the Intel 510, that currently is priced higher than Intel's 520 SSD, of the same capacity. Not many 510's left, and they are a discontinued product.

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    • #17
      Re: Asynchronous vs. Synchronous NAND Flash SSD Performance

      Originally posted by parsec View Post
      Well, it is about 1:45AM CST, 12/22/2012 and all is well. Yet another "impending" apocalypse that fizzled, how many have I lived through in my lifetime?

      Regarding this:

      INTEL 330 180GB
      NAND: Asynch(?)
      Low Price: $89.95
      High Price: $149.50


      There is no chance the Intel 330 uses asynchronous NAND. The last time Intel used async NAND was in their G2 SSDs, like the X-25 M series, which used ONFI 1.0 Async NAND chips. They were introduced in July, 2009, the 80GB version cost ~$225.

      I'm surprised that Async NAND is still manufactured, given the current ONFI standard of 2.0, and 3.0 will be seen in 2013. Perhaps it is used for other purposes. Any SSD manufacture using Async NAND today may be using NOS (New Old Stock) NAND, which I would think would be cheap. OTOH, prices of the older 34nm NAND chips was much higher than the newer 2Xnm chips, so you can find seemingly strange pricing on older SSDs, like the Intel 510, that currently is priced higher than Intel's 520 SSD, of the same capacity. Not many 510's left, and they are a discontinued product.
      Yeah, you're absolutely right! I was thinking about a different drive when I was typing that, but to clear it up, YES the 330 uses Synchronous MLC NAND!!!
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      • #18
        Re: Asynchronous vs. Synchronous NAND Flash SSD Performance

        As far as I know, consumer grade synchronous and asynchronous Nand both use MLC (Multi-Level Cell).
        Originally only enterprise Nand used the much more expensive and better performing SLC (Single-Level Cell) Nand.
        TLC (Triple Level Cell) Nand is the newest low cost, slower performing Nand, recently used in Samsung's 840 mainstream ssd's. The Samsung 840 PRO modules use their latest toggle Nand that offers top tier performance. Current Samsung ssd pricing shows that the PRO models have prices that are up to 50% higher than their less expensive TLC Nand models. SSD endurance with TLC Nand is a possible long term issue.

        web search: mlc vs slc vs toggle nand

        Micron TLC Nand video:
        Last edited by profJim; 12-24-2012, 06:45 AM. Reason: add Micron TLC video link
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        • #19
          Re: Asynchronous vs. Synchronous NAND Flash SSD Performance

          Originally posted by nleksan View Post
          Yeah, you're absolutely right! I was thinking about a different drive when I was typing that, but to clear it up, YES the 330 uses Synchronous MLC NAND!!!
          No problem, I just have a thing about inaccurate information in forum posts, that inevitably gets noticed by someone and then spreads that false information elsewhere. It seems false or partially accurate information becomes quickly disseminated across the Internet. Particularly if it is negative about a product.

          But I should talk, given what I wrote about the Monster Digital SSDs. The reviews are not in yet, speaking of which...

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          • #20
            Re: Asynchronous vs. Synchronous NAND Flash SSD Performance

            Originally posted by chrisram View Post
            I have the Daytona and its been here since before the launch. They haven't sent me firmware 5.0.3 or higher yet for TRIM to work so it's just sitting in a box. I've emailed their people and they aren't in too big of a hurry to send the firmware. The drive is kind of cool, I think it uses flash from Toshiba. I haven't looked at it in several months but the flash isn't your run of the mill IMFT or Toshiba Toggle. They sent the drive but don't want to aid me in getting the review out so it sits.
            That's interesting, and a shame. I wondered how Monster Digital's support staff would be regarding issues with their products, and your experience may give us some insight.

            You are doing them a favor by not reviewing it in its current state, but IMO you have given Monster Digital a chance to improve it. A review of the SSD as it currently is will show the performance that owners and prospective buyers will get now. If they don't understand that a less than wonderful review for their first foray into the SSD marketplace could ruin their reputation (as you do) then IMO they are not serious about it.

            IMO the TRIM problem with the SandForce firmware was blown out of proportion (not by you Chris R.) by some of the owners of these products. Isn't it true that TRIM worked to some degree, rather than completely non-functional?

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