The SSD youâ€™ve bought may not be exactly the SSD you think it is. Thatâ€™s because of a common vendor practice of swapping out internal parts due to supply, pricing pressure, or other reasons.
Usually this practice has focused on the NAND flash storage modules on SSDs, and the vendor has met or exceeded the promised specification. If the change is significant, the vendors have usually changed the SKU. But as Sean Webster of Tomâ€™s Hardware discovered in his investigation of the Adata XPG 8200 Pro, the company changed the SSD controller without changing the nameâ€”except the performance changed, for the worse. There was no way of knowing the difference from the outside.Â Â