ADATA has launched a new lineup of its XPG-series SSDs, with the new models featuring 3D MLC NAND flash and targeted at gaming PCs. The new XPG SX950 family drives use a SATA interface and on paper deliver the performance expected mainstream SSDs. The key selling point of the new XPG SX950 products will be their six-year warranty and enhanced endurance ratings.

The ADATA XPG SX950 resembles the company’s Ultimate SU900 drive announced late last year: both come in 2.5” form-factor, are based on the Silicon Motion SM2258 controller (four NAND flash channels, LDPC ECC technology, a DRAM buffer and pseudo-SLC caching support) as well as 3D MLC NAND - we presume from Micron. The XPG SX950 is a bit faster on paper as it supports sequential read speed of up to 560 MB/s as well as sequential write speed of up to 530 MB/s when pseudo-SLC caching is used. As for random performance, the XPG SX950 can perform up to 90K read IOPS and up to 90K write IOPS (see the table for details), which is a listed feature of the controller.

The key advantages of the ADATA XPG SX950 drives are their long warranty as well as endurance/reliability, which is why the manufacturer did not maximize capacities of the SSDs and left some extra memory for overprovisioning. The XPG SX950 family includes 240 GB, 480 GB, and 960 GB models.

ADATA XPG SX950 Specifications
Capacity 240 GB 480 GB 960 GB
Model Number ASX950SS-240GM-C ASX950SS-480GM-C ASX950SS-960GM-C
Controller Silicon Motion SM2258
Sequential Read 560 MB/s
Sequential Write 520 MB/s 530 MB/s
Random Read IOPS Up to 80K IOPS Up to 90K IOPS Up to 90K IOPS
Random Write IOPS Up to 90K IOPS Up to 90K IOPS Up to 85K IOPS
Pseudo-SLC Caching Supported
DRAM Buffer Yes, capacity unknown
TCG Opal Encryption No
Power Management DevSleep
Power Consumption Active: 0.82 W
Slumber: 0.41 W
Warranty 6 years
MTBF 2,000,000 hours
TBW 200 TB 400 TB 800 TB
MSRP $139.99 $249.99 $449.99

The ADATA XPG SX950 SSDs are the fastest SATA drives from ADATA that are rated for 2 million hours MTBF and featuring the longest warranty (six years). ADATA would seem to have maximized the performance of the XPG SX950 vs. predecessors and improved endurance of the products at the same time, in exchange for a small amount of space for provisioning.

The ADATA XPG SX950 SSDs are about to hit Amazon/Newegg soon and are expected to be available shortly. MSRPs for 240 GB, 480 GB and 960 GB drives will be $139.99, $249.99 and $449.99, respectively. The recommended prices of the XPG SX950 SSDs are slightly higher than the Ultimate SU900 series. Moreover, prices of the latter have dropped in retail since their announcement in 2016, so the actual difference will be even more significant initially. The slightly higher performance, improved endurance, and a six-year warranty will cost money, but it remains to be seen whether customers are willing to pay significant premiums for SATA drives today.

ADATA XPG SX950, SU800 and SU900 MSRP Comparison
  128 GB 256 GB
240 GB
512 GB
480 GB
1 TB
960 GB
2 TB
SU800 $59.99 $79.99 $139.99 $269.99 -
SU900 - $117.99 $219.99 $409.99 unknown
SX950 - $139.99 $249.99 $449.99 -

Related Reading:

Source: ADATA



View All Comments

  • beginner99 - Thursday, February 16, 2017 - link

    Typos in table. TB instead of GB! Reply
  • surt - Tuesday, February 21, 2017 - link

    Looks like they fixed it quickly, uses GB for capacity, TB for total write (TBW) now. Reply
  • BrokenCrayons - Thursday, February 16, 2017 - link

    3D MLC is always nice, but I'm not sure the pricing is competitive enough to attract much interest. Reply
  • lilmoe - Thursday, February 16, 2017 - link

    No it's not. OEMs are milking the crap out of us. It's definitely costs significantly less than 20% to produce tlc nand and we're well past the r&d payback preps. Yes, I'm looking at you Sammy. Smh... Reply
  • ImSpartacus - Thursday, February 16, 2017 - link

    Ol' Sammy has some mindshare in the ssd market. A fair number of folks see them as desirability superior.

    Better milk it while you've got it.
  • Bullwinkle J Moose - Thursday, February 16, 2017 - link

    TBW = 200TB and only a 6 year warranty?

    256GB Samsung 850 Pro only has a TBW of 150 but with a 10 year warranty for $10 less than the Adata

    I would trust a 10 year warranty over an inflated TBW spec any day of the week
    Besides, now that the leader of Samsung has been arrested (Today) I hope they can quickly raise the bribe money needed for his release with a massive sale for on Samsung SSD's

    I could use a new 80" TV as well
  • Gothmoth - Thursday, February 16, 2017 - link

    give me a 2 TB SSD with 3 years warranty for 300 euro. doesn´t have to be that fastest on the market. if i want best performance i buy a m.2. but for DATA disk a mediocre SSD would be fine.
    the effort for keeping HDD´s absolutely quiet is killing me. my system is silent.. only think i hear is HDD´s when accessed.

  • ImSpartacus - Thursday, February 16, 2017 - link


    We've seemed to have topped out at 1TB for budget drives.

    Larger stuff seems to be possible, but it's not getting cheap.
  • Michael Bay - Friday, February 17, 2017 - link

    There was an arcticle here at AT that claimed median SSD capacities rising the ladder of sorts for the past few years. Some brands don`t even bother with 120Gb drives anymore.

    Maybe we`ll get those affordable 2Tb yet.
  • Billy Tallis - Friday, February 17, 2017 - link

    Some of the dearth of 2TB drives is due to the cheap controllers not easily supporting that capacity with 128Gb flash dies. But most of it at this point is due to the NAND shortage. Everyone has a 2TB drive ready, but not necessarily ready to sell at a price that makes sense. Hopefully as the 64+ layer 512Gb 3D NAND parts hit the market this year we'll see the shortage end and prices start dropping significantly, and maybe a bit before then. Reply

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