Form factor code, PCIe generation and lane count, before any speed figure · review

Lexar EQ790 1 TB, five years of warranty with no total beside them review

A one-terabyte Gen 4 drive with a short title, both sequential figures, a five-year term and neither of the two endurance quantities that would say what such a term is measured against.

By Jean-Benoit Buisson

The bottom line A short, clean title, a complete pair of rates and a five-year promise. What is missing is the number that promise is normally measured against, which leaves the most valuable line on the page half stated.

On the listing

A one-terabyte M.2 2280 solid-state drive on PCIe Gen4 with NVMe; sequential reading and writing of up to 7000 and 5000 MB/s, described as avoiding delays and improving responsiveness; host memory buffer and single-level cell cache technologies over a PCIe 4.0 interface; three-dimensional flash described as reliable and long-lasting, stated twice in identical bullets; compatibility with computers, laptops and a games console; and a limited five-year maker’s warranty.

Five years, and the total that would bound them

The sixth bullet is the most valuable line on this page. It names a party, a length and a limitation, which is more than most listings here manage. What it does not name is the written total, and solid-state warranties are normally worded to end at whichever of the two limits comes first. A term without its total tells a buyer how long the promise could last and not when it might stop.

Seven thousand read, five thousand written

The pair is published and the gap between them is two thousand megabytes per second. That gap is the useful part: it says the drive was designed around reading, which suits a machine that loads large files far more often than it receives them. Both numbers describe the opening of a transfer, with the fast buffer empty.

Two ways of doing without a memory chip

The second bullet names a host memory buffer and a single-level cell cache in the same breath. They solve different problems — one borrows the computer’s memory to hold the address map, the other uses part of the flash as a quick landing area for writes — and both are the arrangements a drive uses when it carries no memory chip of its own. The page names them clearly and never claims an on-board cache.

The same bullet twice

Bullets three and four repeat one another word for word. On a six-line list it costs less than it would on a five-line one, and it still displaces the line where a written total or an IOPS pair would have gone.

Before ordering

Ask for the written total that bounds the five years, and for the lane count. The term is the reason to choose this drive, and the figure that qualifies it is the one the page leaves out.

Availability

Priced from 160 € to 169 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.

It is stocked on the British Amazon store as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.

In the American Amazon catalogue with no live offer against it: the reference exists, nobody is filling it.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

Where it holds up, and where it stops

Strengths

A maker’s term of five years is stated plainly, and it is the only one of the three endurance quantities that carries an obligation
Both sequential figures are published, and the gap between them is wide enough to be informative rather than decorative
The length code sits in a title short enough to read in a single line, which is rarer here than the figure itself

Compromises

The five-year term is published with no written total beside it, and terms of this kind normally end at whichever of the two limits arrives first
The third and fourth bullets are the same sentence twice
No lane count and no figure in IOPS, so the interface and the daily behaviour are each half described

Specifications

Capacity	1 TB — printed in the title, in the maker’s unit and reported here in that unit without conversion
Form factor code	M.2 2280 — printed in the title, which is four items long and carries the code in it
PCIe generation	PCIe Gen4 — printed in the title and named again in the second bullet as a PCIe 4.0 interface
Lane count	Not published on the listing — no lane figure follows the generation in the title or in any of the six bullets
Stated sequential read figure	Up to 7000 MB/s — stated in the first bullet as the read half of a sequential pair
Stated sequential write figure	Up to 5000 MB/s — stated in the first bullet as the write half of that pair, two thousand below the read figure beside it
Stated random IOPS	Not published on the listing — no figure in IOPS appears in the title or in the six bullets, which cover the interface, the memory, a console and the warranty
TBW rating	Not published on the listing — no total in terabytes written appears, on a page whose last bullet publishes the term that such a total normally bounds
Stated MTBF	Not published on the listing — no figure in hours appears anywhere on the page
Warranty length	Five years, limited, from the maker — stated in the sixth bullet, which gives the term and none of its conditions
DRAM cache	Not published on the listing as memory on the drive — the second bullet names host memory buffer and SLC cache technologies together, and both are arrangements for working without a memory chip on the board
Heatsink	Not published on the listing — no heatsink, no thermal pad and no temperature behaviour is named in the title or in the six bullets
Amazon reference	B0DNMCJHJP (same reference on 6 Amazon marketplaces)
EAN	4895217918097

The questions that come up before an order

What normally ends a five-year drive warranty before five years?

A written total. Most solid-state warranties run to a period or to a stated number of terabytes written, whichever arrives first, which is why the two figures are usually printed together. This page gives the period and not the total, so the point at which the term could end early cannot be read from it at all.

Does a wide gap between the read and write figures matter?

It tells you which direction the drive was built around. Reading is easier than writing on this kind of memory, and a drive whose write figure sits two thousand below its read figure will feel quick to load and slower to receive a large copy. Both are peaks taken with the fast buffer empty, and the gap between them is the more durable piece of information.