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NVME Nand & Dram Bait and Switch?

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post #1 of 19 (permalink) Old 01-23-2020, 09:05 PM - Thread Starter
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NVME Nand & Dram Bait and Switch?

Background: I was perfectly happy with an ADATA SX8200 PRO 1TB so I decided to purchase another one, 512GB this time.

The drive was supposed to have Micron TLC Nand and Nanya DRAM. Which, my 1TB SX8200 PRO did indeed. However, the 512GB one has UNIC2 NAND and Samsung DRAM. It's a clear bait and switch to me with reviews showing the 512GB Model hitting the advertised 3500/2300 read/write speeds while the one I received hit just 3200/2200 at most with worse 4KiB Q8T8 but better 4KiB Q32T1 performance.

I've come across another post stating that their P34A80 came with UNIC2 chips as well. Not here to call out just Adata or Silicon Power for this bait and switch but try to find out what these Unic2 chips are and just how much of a performance/longevity impact these have in the long run.

Also, buyer beware for anyone who's looking at these SSDs.

SSD in question and Crystal Disk Mark run:
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post #2 of 19 (permalink) Old 01-23-2020, 09:07 PM
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what speeds does your not-different from advertised hit? hmm, bad comparison. 1TB gonna be faster, even if identical.

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post #3 of 19 (permalink) Old 01-23-2020, 09:11 PM - Thread Starter
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Quote: Originally Posted by skupples View Post
what speeds does your not-different from advertised hit? hmm, bad comparison. 1TB gonna be faster, even if identical.
The 512GB version is advertised to hit 3500/2300 on CrystalDiskMark but this UNIC2/Samsung revision is doing just 3200/2200. Here's a link to someone who reviewed the Micron TLC/Nanya DRAM version and they got close to what's advertised.

https://www.modders-inc.com/adata-xp...dable-price/3/

Ps. I wasn't comparing the 512GB UNIC2/Samsung revision at all with the 1TB Micron/Nanya board in my original post.

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Last edited by Kand; 01-23-2020 at 09:15 PM.
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post #4 of 19 (permalink) Old 01-23-2020, 09:17 PM
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It's always "up-to" speeds btw


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post #5 of 19 (permalink) Old 01-23-2020, 09:21 PM - Thread Starter
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Quote: Originally Posted by Duality92 View Post
It's always "up-to" speeds btw

Right. But as stated in my Original Post, I'm wondering more about the longevity and reliability of this revision from Micron/Nanya to UNIC2/Samsung.

Who even is UNIC2?

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post #6 of 19 (permalink) Old 01-23-2020, 10:59 PM
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Quote: Originally Posted by Kand View Post
Who even is UNIC2?
They're a Chinese NAND manufacturer. More than that (of any use) I cannot find currently.


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post #7 of 19 (permalink) Old 01-24-2020, 07:13 AM - Thread Starter
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Quote: Originally Posted by Paradigm Shifter View Post
They're a Chinese NAND manufacturer. More than that (of any use) I cannot find currently.
Right. I have a half mind to return this and get a 1TB model with the correct chips.

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post #8 of 19 (permalink) Old 01-24-2020, 07:43 AM
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Hi,
You got closer than i ever did testing three 8200 adata m.2's 2-512gb and 1-1tb none came iven remotely close to read/ write spec's testing on two systems.
All were returned to amazon.




Lots of testing on this thread this is towards the end but yeah just switched to samsung 970 evo and evo plus which both exceeded read/ writes automatically
https://www.overclock.net/forum/355-...l#post28052434

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post #9 of 19 (permalink) Old 01-24-2020, 08:00 AM - Thread Starter
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Here's my sx8200 1TB with Micron/Nanya. You can probably see why I was satisfied with it.
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post #10 of 19 (permalink) Old 01-24-2020, 08:05 AM
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Hi,
For one it's empty
Put an os on it and see what happens.

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