Anandtech checked out the ADATA XPG SX8200 & GAMMIX S11 NVMe SSD
A quote from the article:
ADATA has a very broad portfolio of consumer NVMe SSDs, featuring most of the controller solutions available on the open market. Not all of these have been particularly successful, but the most recently released drives use a formula that has been working well for several other players in the SSD market: Silicon Motion's SM2262 controller combined with Intel/Micron 64-layer 3D TLC NAND flash memory. The ADATA XPG SX8200 and GAMMIX S11 SSDs differ primarily in branding and the design of their heatspreaders, but underneath they both feature the same SSD architecture that we've found makes for a great combination of high performance and reasonable prices.ADATA XPG SX8200 & GAMMIX S11 NVMe SSD Review
The SX8200 and GAMMIX S11 replace several older ADATA SSDs that used Silicon Motion's first NVMe SSD controller, the SM2260. The XPG SX8000 paired that controller with Micron's 32-layer 3D MLC NAND, while the XPG SX7000 and GAMMIX S10 used Micron's 32-layer 3D TLC NAND. Those first-generation NVMe drives from ADATA suffered from the limitations of the SM2260 controller and the first-generation 3D NAND from Intel and Micron. As a result, even the use of MLC NAND in the SX8000 couldn't enable it to reach the performance of good TLC-based SSDs like the Samsung 960 EVO. The SX7000 and GAMMIX S10 were even worse off and despite ADATA's branding (and pricing) them like high-end SSDs, they were among the slowest NVMe SSDs on the market and could not reliably outperform mainstream SATA SSDs.