Many companies are engaging in the disgusting practice of bait and switching. This is a post to document part numbers, model numbers or other identifying characteristics to help us distinguish older faster drives from their newer slower drives that have the same name.
**Samsung 970 EVO Plus**
Older version – part number: MZVLB1T0HBLR.
Newer version – part number: MZVL21T0HBLU.
You won’t be able to find the part number on the box, you have to look at the actual drive.
Older version is significantly better for sustained write speeds, newer version may be fine for those who don’t need to write more than 100+ GB at a time.
**Western Digital Black SN750**
Older model number: WDS100T3X0C
Newer model number: WDBRPG0010BNC-WRSN.
The first part of the name will change based on the size of drive but if it contains “3X0C” that indicates if you have the older model or not.
**This one is still a mystery as there are reports of the older model number WDS100T3X0C-00SJG0 producing slower speeds as well.**
**Western Digital Blue SN550**
NAND flash part number on old version: 60523 1T00
NAND flash part number on new version: 002031 1T00
Switched from TLC to QLC
“The only differentiator is that the new QLC variant has UK/CA printed on the packaging near the model number, and the new firmware revision. There are also two fewer NAND flash packages on our new sample, but that is well hidden under the drive’s label.”
**Adata XPG SX8200 Pro**
Oldest fastest model – Controller: SM2262ENG
Version 2 slower – Controller: SM2262G, Flash: Micron 96L
Version 3 slowest – Controller: SM2262G, Flash: Samsung 64L
Apparently there’s a few more versions as well
This is not an exhaustive list, hopefully others will chime in and this can be updated with other makes and models. I do want to keep this strictly to NVME drives.