GoKawiilThe Biwin M350 is a budget PCIe 4.0 SSD done right. Good performance where it matters, good power efficiency too. Weak sustained performance from its QLC flash, though.
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A Kingston NV3-killer from Biwin? This once lesser-known brand continues to surprise, delivering a drive that punches above its weight. The M350’s competitive hardware makes for a compelling QLC-based budget SSD without making heavy compromises. The market may again be flooded by entry-level PCIe 4.0 drives, and the M350 stands out by balancing high power efficiency with good random read performance. It’s a particularly solid candidate for laptop upgrades and secondary storage, but it could serve you well anywhere in a pinch.
Biwin M350 Specifications
Swipe to scroll horizontally Product 500GB 1TB 2TB 4TB Pricing N/A N/A $312.99 $519.99 Form Factor M.2 2280 (Single-sided) M.2 2280 (Single-sided) M.2 2280 (Single-sided) M.2 2280 (Single-sided) Interface / Protocol PCIe 4.0 x4
NVMe 2.0 PCIe 4.0 x4
NVMe 2.0 PCIe 4.0 x4
NVMe 2.0 PCIe 4.0 x4
NVMe 2.0 Controller Silicon Motion SM2268XT2 Silicon Motion SM2268XT2 Silicon Motion SM2268XT2 Silicon Motion SM2268XT2 DRAM N/A (HMB) N/A (HMB) N/A (HMB) N/A (HMB) Flash Memory Micron 232-Layer QLC (N58R) Micron 232-Layer QLC (N58R) Micron 232-Layer QLC (N58R) Micron 232-Layer QLC (N58R) Sequential Read 5,000 MB/s 5,200 MB/s 5,200 MB/s 6,000 MB/s Sequential Write 2,000 MB/s 4,800 MB/s 4,800 MB/s 5,000 MB/s Random Read 400K IOPS 500K IOPS 400K IOPS 400K IOPS Random Write 500K IOPS 600K IOPS 600K IOPS 800K IOPS Endurance 200TBW 400TBW 800TBW 1,600TBW Part Number BM350NN512G-RGX BM350NN01TB-RGX BM350NN02TB-RGX BM350NN04TB-RGX Warranty 5-Year 5-Year 5-Year 5-Year
The Biwin M350 has a good capacity range, including 500GB, 1TB, 2TB, and 4TB, but the 500GB is difficult to find, and the rest of the drive’s specifications feel a little antiquated. The drive is rated for up to 6,000 / 5,000 MB/s for sequential reads and writes, but only at 4TB. The lower capacities are significantly slower. As for random reads and writes, the drive can hit up to 400K / 800K IOPS, again at 4TB. Random write IOPS fall for the lower capacities. This isn’t a flagship drive, and the random reads in particular seem oddly measured.
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