South Korea

Samsung

Samsung prints the random figure and the warranty

One Samsung drive here

The SSD 990 1 TB, a PCIe 4.0 ×4, NVMe 2.0 drive in the M.2 2280 length.

What the page states

Both sequential figures, a random write figure of 1,100,000 IOPS — the kind of number most drives on the shelf leave out — compatibility with PCIe 3.0, a three-year limited warranty and the Samsung Magician software for firmware updates.

What it leaves out, and what it costs

No TBW rating and no random read figure. On October 26, 2026 it was the most expensive drive on the NVMe shelf by a wide margin, without faster sequential figures than the cheaper Gen 4 drives beside it; the extra buys the brand, Magician and a written random write figure.

Every Samsung unit reviewed here

SATA SSDs

Samsung 870 EVO 1 TB, whose written total belongs to a smaller drive

1 TB · 2.5-inch · SATA III · up to 560 MB/s read · up to 530 MB/s write · a written total published for the 250 GB variant · buffer named for sustained loads · no MTBF, no warranty term

A one-terabyte drive that publishes both sequential figures and a write buffer for long workloads, and whose only written total is attached in the same sentence to a quarter-terabyte variant.

Best for: A machine that records or receives long continuous files, where a named buffer for sustained work matters and the endurance figures will be looked up elsewhere.

7.8/10

No Amazon.com offer on October 26, 2026

Check price on Amazon Read the review: Samsung 870 EVO 1 TB, whose written total belongs to a smaller drive
NVMe SSDs

Samsung SSD 990 1 TB, a random write figure and a three-year term

1 TB · M.2 2280 · PCIe 4.0 ×4, NVMe 2.0 · 7,150 MB/s read · 6,450 MB/s write · 1,100,000 random write IOPS · 3-year warranty

A Gen 4 ×4 drive whose Amazon.com page states both speeds, 1,100,000 random write IOPS, the M.2 2280 format and a three-year warranty — at $281.50 on October 26, 2026, the highest price on this shelf.

Best for: A buyer who wants Samsung's Magician software and a written three-year warranty, and accepts the highest price on this shelf for them.

8.4/10

≈ $282

Check price on Amazon Read the review: Samsung SSD 990 1 TB, a random write figure and a three-year term

What each Samsung review concluded

Samsung 870 EVO 1 TB — Two rates at the top of what the interface allows, a genuinely useful buffer claim, and a written total that belongs to a drive a quarter of this size.
Samsung SSD 990 1 TB — The most completely specified drive on this shelf for speed and warranty, and the most expensive by a wide margin on this date.

Every price named in a summary was read on the date that review carries. What a shop asks today is shown beside the product, and it moves.