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ADATA SU750SS 256GB 2.5 inch SSD, Black Color Box $29.99 FS

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Joined Nov 2008
L6: Expert
> bubble2 1,104 Posts
103 Reputation
magnovox00
07-12-2020 at 08:47 AM.
07-12-2020 at 08:47 AM.
Sold & shipped by ADATA TECHNOLOGY USA CO LTD
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Joined Jul 2017
Not Bender
> bubble2 1,645 Posts
209 Reputation
FLEX0
07-12-2020 at 10:19 AM.
07-12-2020 at 10:19 AM.
Decent price on a decent drive. Adata seems to have sales at Walmart often. I just picked up a 120GB SU650 for $20 a few weeks ago.
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Joined Aug 2007
L3: Novice
> bubble2 263 Posts
22 Reputation
busterbaxter
07-12-2020 at 10:56 AM.
07-12-2020 at 10:56 AM.
I saw confusing spec for this drive. ADATA website says it has DRAM cache but some review sites say that only the SU800 has DRAM while this one skips it. Can someone with this drive clarify? Thanks!
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Joined Mar 2016
L2: Beginner
> bubble2 1,016 Posts
144 Reputation
SDealsLover
07-12-2020 at 11:12 AM.
07-12-2020 at 11:12 AM.
What's the diff between 8xx and 7xx series? I heard 8xx series is better.
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Joined Jul 2017
Not Bender
> bubble2 1,645 Posts
209 Reputation
FLEX0
07-12-2020 at 11:55 AM.
07-12-2020 at 11:55 AM.
Quote from busterbaxter :
I saw confusing spec for this drive. ADATA website says it has DRAM cache but some review sites say that only the SU800 has DRAM while this one skips it. Can someone with this drive clarify? Thanks!
Generally don't recommend this website [userbenchmark.com], but the write speeds (especially sustained write speeds) are very similar between the two. This leads me to believe that the SU750 does have DRAM. Plus, all the documentation I could find says it does have DRAM. I have the older SU700 and it does NOT have DRAM.
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Last edited by buttbuddy July 12, 2020 at 02:47 PM.
Joined Dec 2017
L4: Apprentice
> bubble2 358 Posts
976 Reputation
Original Poster
LO6932
07-12-2020 at 11:59 AM.
07-12-2020 at 11:59 AM.
Quote from busterbaxter :
I saw confusing spec for this drive. ADATA website says it has DRAM cache but some review sites say that only the SU800 has DRAM while this one skips it. Can someone with this drive clarify? Thanks!
https://www.adata.com/upload/down...202003.pdf


Ultimate SU750 3D NAND SSD Are you looking to replace your old SSD or HDD? If so, the ADATA Ultimate SU750 solid-state drive is for you. With 3D NAND Flash, it provides higher storage capacity, efficiency, and reliability than 2D NAND. What's more, it features intelligent SLC Caching to achieve read/write performance of 550/520MB per second. All SU750 models provide high TBW (Total Bytes Written), meaning the number of times an SSD can write its entire capacity in one lifespan. The SU750's TBW rating outranks many comparable models, indicating a longer-lasting SSD. Features Ordering Information ● 3D NAND Flash for higher affordability Capacity Model Number EAN Code ● Advanced hardware LDPC ECC technology 256GB ASU750SS-256GT-C 4710273770666 ● Supports SLC Caching and DRAM Cache Buffer 512GB ASU750SS-512GT-C 4710273770673 ● Free software: SSD Toolbox and Migration Utility 1TB ASU750SS-1TT-C 4710273770680 ● Shock, vibration resistant (1500G/0.5ms) Specifications ● Capacity: 256GB / 512GB / 1TB ● Operating Temperature: 0°C-70°C ● NAND Flash: 3D NAND ● Storage Temperature: -40°C-85°C ● Interface: SATA 6Gb/s (SATA III) ● Shock Resistance: 1500G/0.5ms ● Form Factor: 2.5" ● MTBF: 2,000,000 hours ● Dimensions (L x W x H): 100.45 x 69.85 x 7mm ● Certifications: RoHS, CE, FCC, BSMI, VCCI, KC ● Weight: 47.5g ● Warranty: 3 years


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Joined Dec 2017
L4: Apprentice
> bubble2 358 Posts
976 Reputation
Original Poster
LO6932
07-12-2020 at 12:03 PM.
07-12-2020 at 12:03 PM.
Quote from SDealsLover :
What's the diff between 8xx and 7xx series? I heard 8xx series is better.
https://www.adata.com/en/compare/?ProNo=595,410



Hard to read in text but the top is the 750, the bottom is the 800.

The 800 has a slightly higher read spead, plus seems to twice as durable.

Ultimate SU750

Ultimate SU800
Capacity
256GB / 512GB / 1TB
128GB / 256GB / 512GB / 1TB / 2TB
Form Factor
2.5"
2.5"
NAND Flash
3D NAND
3D TLC
Dimensions (L x W x H)
100.45 x 69.85 x 7mm
100.45 x 69.85 x 7mm
Weight
47.5g
59.5g
Interface
SATA 6Gb/s
SATA 6Gb/s
Sequential Read (Max*)
Up to 550MB/s
Up to 560MB/s
Sequential Write (Max*)
Up to 520MB/s
Up to 520MB/s
4KB Random Read IOPS(Max*)
Up to 65K
Up to 85K
4KB Random Write IOPS(Max*)
Up to 75K
Up to 85K
Operating Temperature
0°C - 70°C
0°C - 70°C
Storage Temperature
-40°C-85°C
-40°C-85°C
Shock Resistance
1500G / 0.5ms
1500G / 0.5ms
MTBF
2,000,000 hours
2,000,000 hours
Terabytes Written (TBW)(Max Capacity*)
800TB
1600TB
Warranty
3-year limited warranty
3-year limited warranty
Note
1. Actual performance may vary due to available SSD capacity, system hardware and software components, and other factors.
2. The SSD is based on the TBW or Warranty period.
3. Visit www.adata.com/en/ss/prowar/ for more details.
1. Actual performance may vary due to available SSD capacity, system hardware and software components, and other factors.
2. The SSD is based on the TBW or Warranty period.
3. Visit www.adata.com/en/ss/prowar/ for more details.

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Joined Nov 2012
L6: Expert
> bubble2 1,999 Posts
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jkilez
07-12-2020 at 12:56 PM.
07-12-2020 at 12:56 PM.
Quote from LO6932 :
● Supports SLC Caching and DRAM Cache Buffer
I believe you are missing the point that despite what ADATA lists on their web page, it appears that the SU750 does not have a DRAM cache. Most reviews of the SSD note this, like the following from Tom's Hardware:
Quote from https://www.tomshardware.com/reviews/adata-su750-ssd,6316.html :
Like Adata's other entry-level NVMe SSD, the XPG SX6000 Pro, the Ultimate SU750 features a Realtek SSD controller and Micron NAND flash. Specifically, it is powered by the Realtek RTS5733DMQ controller. And contrary to what Adata says on the device's web page (as of publication time), this controller is a DRAMless, two-channel controller. To the non-tech savvy, this may not mean much, but these two factors have performance-limiting implications, which negatively impact the real-world user experience.
Quote from LO6932 :
The 800 has a slightly higher read spead, plus seems to twice as durable.
The listing for the SU800 includes the 2TB model which is 1600TBW. At equal capacities, the claimed durability of both the SU750 and SU800 on their respective datasheets is exactly the same.

DRAM or not, it seems like a decent deal on a drive that is very close to the SU800 in performance.
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Last edited by jkilez July 12, 2020 at 01:24 PM.
Joined Nov 2012
L6: Expert
> bubble2 1,999 Posts
1,903 Reputation
jkilez
07-12-2020 at 01:11 PM.
07-12-2020 at 01:11 PM.
Quote from buttbuddy :
I have the older SU700 and it does have DRAM.
Do you have a cite for that? The SU700 datasheet makes no mention of DRAM, and the only mention I can find of that feature is a product announcement blurb that specially says that it does not have DRAM:

Quote from https://www.anandtech.com/show/11237/adata-launches-su700-maxiotek-mk8115-controller-3d-tlc-nand-up-to-960-gb :
The ADATA Ultimate SU700 drives appear to be one the first retail SSDs featuring the MK8115 without onboard DRAM.
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Joined Jan 2014
Non
> bubble2 941 Posts
391 Reputation
lenfari
07-12-2020 at 01:16 PM.
07-12-2020 at 01:16 PM.
Wish it has larger capacity
2
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Joined Dec 2017
L4: Apprentice
> bubble2 358 Posts
976 Reputation
Original Poster
LO6932
07-12-2020 at 01:29 PM.
07-12-2020 at 01:29 PM.
Quote from jkilez :
I believe you are missing the point that despite what ADATA lists on their web page, it appears that the SU750 does not have a DRAM cache. Most reviews of the SSD note this, like the following from Tom's Hardware:



The listing for the SU800 includes the 2TB model which is 1600TBW. At equal capacities, the claimed durability of both the SU750 and SU800 on their respective datasheets is exactly the same.

DRAM or not, it seems like a decent deal on a drive that is very close to the SU800 in performance.
Nice find and thank you for the insightful information.

Here is another mention of the lack of DRAM in a different independent review.

https://www.legitreviews.com/adat...iew_218095

"We voided our warranty and cracked the drive open to see what was inside. What we found was small green PCB that contained a Realtek RTS5733 two-channel and four Micron 64-layer TLC NAND Flash chips. With two Flash chips being located on the top of the PCB and two being located on the bottom. There is no DRAM on the tiny board to serve as a DRAM cache buffer. This is important to point out as the ADATA website and many retailers show this drive as having a DRAM cache buffer. This is not accurate as there is not a dedicated memory chip to be found on the board. The SU750 is a DRAM-less drive!"

I sent a message to directly to Adata to clarify.
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Joined Nov 2017
L4: Apprentice
> bubble2 333 Posts
64 Reputation
Zeric
07-12-2020 at 01:30 PM.
07-12-2020 at 01:30 PM.
Quote from lenfari :
Wish it has larger capacity
For around $30, 256GB is about the most you will get these days. The next step up in size is typically 480GB, it's unlikely you will find that for less than $50 at present. There are some off brands like Zheino or KingSpec with a 360GB, but those are also >$45.
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Joined Nov 2014
L1: Learner
> bubble2 24 Posts
42 Reputation
chrysek2
07-12-2020 at 01:31 PM.
07-12-2020 at 01:31 PM.
I only see it at $32.99
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Joined Dec 2013
L2: Beginner
> bubble2 49 Posts
146 Reputation
b333v333
07-12-2020 at 01:34 PM.
07-12-2020 at 01:34 PM.
Quote from chrysek2 :
I only see it at $32.99

Me too
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