ADATA’s XPG SX950 SATA SSDs: Up to 960GB, 3D MLC NAND, Six Year Warranty

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
Capacity240 GB480 GB960 GB
Model NumberASX950SS-240GM-CASX950SS-480GM-CASX950SS-960GM-C
ControllerSilicon Motion SM2258
NAND Flash3D MLC NAND
Sequential Read560 MB/s
Sequential Write520 MB/s530 MB/s
Random Read IOPSUp to 80K IOPSUp to 90K IOPSUp to 90K IOPS
Random Write IOPSUp to 90K IOPSUp to 90K IOPSUp to 85K IOPS
Pseudo-SLC CachingSupported
DRAM BufferYes, capacity unknown
TCG Opal EncryptionNo
Power ManagementDevSleep
Power ConsumptionActive: 0.82 W
Slumber: 0.41 W
Warranty6 years
MTBF2,000,000 hours
TBW200 TB400 TB800 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 GB256 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$409.99unknown
SX950$139.99$249.99$449.99

Gallery: ADATA XPG SX950

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