Biwin is a Chinese manufacturer that has been a supplier of flash memory and DRAM for major brands for many years. With its own Black Opal brand, the company is now also targeting end customers directly. The NV7400 SSD is a central model and is offered as a fast PCIe 4.0 M.2 solution with sequential transfer rates of up to 7450 megabytes per second when reading and 6500 megabytes per second when writing. It is available in capacities from 512 gigabytes to 4 terabytes, works without a dedicated DRAM cache and instead relies on host memory buffers.
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The target group primarily includes PC users, gamers and professional users who are looking for high performance, plenty of storage space and high durability at a relatively favorable price-performance ratio. The SSD can also be of interest for workstations or as an upgrade for consoles, albeit with certain restrictions. In terms of price, the NV7400 is quite affordable in international comparison, with the 2-terabyte version costing around 120 US dollars, which makes it a particularly competitive option in its segment. However, we have to take a closer look at the 4 TB version.
The Biwin NV7400 with 4 terabytes is currently priced in Germany at around 220 to 240 euros and is therefore quite competitive in direct comparison with other common PCIe 4.0 SSDs in this capacity class. Models such as the Lexar NM790 or the WD Blue SN5000 are priced at almost the same level, usually around €225 to €227. Established offerings such as the Crucial P3 Plus or the Verbatim Vi7000G, which cost around 245 euros each, rank slightly above this, while cheaper but less well-known brands such as Phixero or Fikwot are somewhat more aggressively priced at around 202 to 210 euros. At the upper end of the spectrum is the Seagate FireCuda 530R, which costs a considerable premium at around 339 euros, but in practice is also considered a high-end solution with particularly high durability values and top performance. It is cheaper than many brand models, offers similar performance to the Lexar NM790, but relies on a DRAM-less design, which can have slight disadvantages in certain scenarios. However, for users looking for a 4-terabyte SSD with solid speed at a fair price, it is a well-balanced solution that is neither in the cheap nor the high-priced enthusiast segment. And that’s exactly why I’m testing it today.
Unboxing and scope of delivery
When you open the package, you’ll find a quick start guide, the SSD, and a small screw. That’s sufficient. That concludes the introduction, and we can begin testing…
Technical specifications
| Feature | Value |
|---|---|
| Form factor | M.2 2280 (single-sided) |
| Interface / protocol | PCIe 4.0 ×4, NVMe 2.0 |
| Controller | MaxIO MAP1602 (4 channels) |
| Memory technology | 3D TLC NAND (Micron B58R, 232 layer) |
| DRAM cache | none (Host Memory Buffer, HMB) |
| Max. sequential read speed | approx. 7,400 MB/s |
| Max. sequential write speed | approx. 6,500 MB/s |
| Max. Random Read IOPS (4K) | approx. 900,000 IOPS |
| Max. Random Write IOPS (4K) | approx. 900,000 IOPS |
| Warranty period | 5 years |
| TBW (Total Bytes Written) | 4.000 TB |
| Dimensions (L × W × H) | approx. 80 × 22 × 2.45 mm |
| Operating temperature | 0 °C to 70 °C |
| MTBF | 1.500,000 hours |
Important preface to the test
All workstation tests were carried out on a frozen test system that has been running in an unchanged configuration for a long time. This ensures that the results remain consistent and comparable within the test series. However, it is possible that the absolute measured values may differ slightly in direct comparison with the results of other testers. The decisive factor is therefore not the exact number, but the relationship between the values within the benchmarks shown here.
For these measurements, I deliberately extended the AJA test and used a 1024 GB variant instead of the previous methodology. The aim was to shed more light on how the pSLC cache works and also to record possible runtime changes in performance. The CrystalDiskMark is run exclusively in NVMe mode in this review. This results in other, additional findings that may differ from conventional results. The ATTO benchmark, on the other hand, remains in the previous setting, so that comparability with older measurements is guaranteed.
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