In our Samsung 990 Pro SSD review, we called it a super-fast storage drive for gamers based on our collection of benchmarks and performance we observed. Samsung also has a reputation for churning out highly reliable SSDs. Even so, bad batches are always a possibility, and that could be at the heart of a potential endurance issue observed recently

Source: Hot Hardware – Some Samsung 990 Pro SSD Users Report An Alarming Drop In Drive Endurance