Form factor code, PCIe generation and lane count, before any speed figure · review
BIWIN Black Opal NV7400 1 TB, the fastest read on this shelf review
A Gen 4 drive with the highest read figure on this shelf, 7,450 MB/s, a random figure of up to 1,000K IOPS and a thin heat sink — and no endurance rating or warranty term on its Amazon.com page.
The title: BIWIN Black Opal NV7400 1 TB, Gen4x4, read up to 7,450 MB/s, NVMe M.2 2280, PCIe 4.0. The bullets: 7,450 MB/s read, 6,500 MB/s write, random read and write up to 1,000K IOPS; PCIe Gen 4 ×4 with 3D TLC NAND, capacities up to 4 TB; a power-management IC and a 0.5 mm graphene aluminium heat sink; HMB with a smart cache and data compression; and the free Biwin Intelligence software.
The shelf it sits on
Drive
Interface
Read
Write
Also published
Amazon.com, October 26, 2026
Intenso M.2 PCIe Premium
Gen 3 ×4, NVMe 1.3
2,100 MB/s
1,700 MB/s
—
$151.41
KingSpec XG7000
Gen 4
7,400 MB/s
6,600 MB/s
600 TBW, 3-year warranty, TLC
$168.99
BIWIN Black Opal NV7400
Gen 4 ×4
7,450 MB/s
6,500 MB/s
1,000K IOPS, HMB, heat sink, TLC
$174.99
Crucial P310
Gen 4
7,100 MB/s
6,000 MB/s
Acronis offer, G8 NAND
$179.97
Acer Predator GM7
Gen 4 ×4, NVMe 2.0
7,400 MB/s
6,500 MB/s
HMB + SLC cache
$179.99
WD_Black SN7100
Gen 4
7,250 MB/s
6,900 MB/s
TLC; listing says it has been replaced
$188.95
Samsung SSD 990
Gen 4 ×4, NVMe 2.0
7,150 MB/s
6,450 MB/s
1,100,000 random write IOPS, 3-year warranty
$281.50
Lexar EQ790
Gen 4 ×4, NVMe 1.4
7,000 MB/s
6,000 MB/s
HMB + SLC, 5-year warranty
no offer
All eight are 1 TB in the M.2 2280 format.
What is not published
A TBW rating, an MTBF and a warranty term — the three figures that say how long the drive is meant to last and who stands behind it.
The price
$174.99 on October 26, 2026, $6.00 more than the KingSpec XG7000.
Prices quoted in this text were read on October 26, 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
7,450 MB/s read, the highest on this shelf, and 6,500 MB/s write
A random figure, 1,000K IOPS, and a heat sink, both stated
3D TLC NAND and a power-management IC named
Compromises
No TBW, MTBF or warranty term
HMB instead of its own DRAM cache
$174.99 on Amazon.com on October 26, 2026, $6.00 more than the KingSpec XG7000, which states 600 TBW and three years
Specifications
Capacity
1 TB — stated in the title
Form factor code
M.2 2280 — stated in the title
PCIe generation
Gen 4 — stated in the title as Gen4x4 and PCIe 4.0
Lane count
Four — stated as Gen4x4
Stated sequential read figure
Up to 7,450 MB/s — stated in the title and the first bullet, the highest on this shelf
Stated sequential write figure
Up to 6,500 MB/s — stated in the first bullet
Stated random IOPS
Up to 1,000K IOPS, read and write — stated in the first bullet
TBW rating
Not published on the Amazon.com listing
Stated MTBF
Not published on the Amazon.com listing
Warranty length
Not published on the Amazon.com listing
DRAM cache
None named — the fourth bullet names Host Memory Buffer (HMB) and a smart cache, which means the drive borrows system memory rather than carrying its own DRAM
Heatsink
A 0.5 mm graphene aluminium heat sink — stated in the third bullet
Amazon reference
B0DM1R7KHZ
EAN
0887184019017
On Amazon.com
Amazon.com had an offer at $175 on October 26, 2026.
The questions that come up before an order
What is HMB?
Host Memory Buffer: the drive uses a small slice of the computer's memory to hold its mapping table instead of carrying a DRAM chip. It costs a little in sustained random work and saves power and money.
What warranty does it have?
The Amazon.com listing does not say. The KingSpec XG7000 and the Samsung 990 on this shelf state three years, the Lexar EQ790 five.
Our score
7.8/ 10
The fastest read figure on this shelf, with IOPS and a heat sink stated. Endurance and warranty are the lines to check, and the KingSpec states both for six dollars less.
Against the rest of the network and storage gear
This network and storage gear share the category and the price bracket. Only what each one states is shown; an incomplete column would mislead.
Model
Price
Form factor code
PCIe generation
Lane count
Stated sequential read figure
BIWIN Black Opal NV7400 1 TB, the fastest read on this shelf
$175
M.2 2280 — stated in the title
Gen 4 — stated in the title as Gen4x4 and PCIe 4.0
Four — stated as Gen4x4
Up to 7,450 MB/s — stated in the title and the first bullet, the highest on this shelf
Gen 4 — PCIe 4.0 in the title; the fourth bullet adds compatibility with PCIe 3.0 slots
Not published on the Amazon.com listing — PCIe 4.0 is named without a lane count
Up to 7,400 MB/s — stated in the title and the first bullet
What separates the models, in network and storage gear
If price decides: KingSpec XG7000 1 TB, 600 TBW and three years stated, at $169.
Highest Stated sequential read figure in the table: this model (Up to 7,450 MB/s — stated in the title and the first bullet, the highest on this shelf).
This model holds the table’s highest figure for Stated sequential read figure.
The buyer this one serves, among network and storage gear
A desktop or laptop Gen 4 slot where the highest read figure on this shelf is wanted and a written warranty is not essential.
What this one costs among network and storage gear
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on October 26, 2026.
What buyers actually choose
Amazon reports what buyers took in the month before this page was last checked: at least 100.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Sources
Specifications: the manufacturer sheet for network and storage gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
A Gen 4 ×4, NVMe 2.0 drive with 7,400 MB/s read and 6,500 MB/s write, HMB and an SLC cache, and thermal management named — and no endurance or warranty term on its Amazon.com page.
Best for: A desktop or laptop Gen 4 slot where the cloning software and NVMe 2.0 are useful and the warranty can be confirmed separately.
1 TB · M.2 2280 · PCIe Gen 3 ×4, NVMe 1.3 · 2,100 MB/s read · 1,700 MB/s write · no endurance, warranty or cache figure
The only Gen 3 drive on this shelf and the cheapest at $151.41 on Amazon.com on October 26, 2026: 1 TB in M.2 2280, 2,100 MB/s read and 1,700 MB/s write, and no endurance, warranty or cache figure.
Best for: A machine with a Gen 3 M.2 slot, where a Gen 4 drive would run at Gen 3 speed anyway.
The cheapest Gen 4 drive on this shelf at $168.99 on Amazon.com on October 26, 2026, and the only one whose listing states an endurance rating — 600 TBW — beside a three-year warranty.
Best for: A desktop, laptop or PS5 slot where the lowest Gen 4 price and a written endurance figure both matter.
