901558

5200 MB/s reads and 289K random write IOPS are the highlights, but 256 TBW endurance and a 1-year warranty drag this down. It's a 2230 form factor drive, which is rare, but you'll pay a premium for that size. Unless you're upgrading a Steam Deck, the value just isn't there.

The headline specs are real: 5200 MB/s read and 4775 MB/s write put this drive in the upper-middle of the Gen4 pack. Random IOPS come in at 195K read and 289K write, which is actually the strongest part of the package, 77th percentile in our database. That's better than the sequential numbers suggest. The drive uses Host Memory Buffer to compensate for the missing DRAM, so it leans on your system's RAM for mapping tables. That works fine on modern Windows and Linux setups, but it's not a substitute for a real DRAM cache under heavy sustained writes. The 2230 form factor is a plus for handhelds and thin laptops, but it also limits NAND packaging, which shows up in the endurance rating.

Against the Samsung 990 Pro and WD Black SN850X, the DLX4 loses on nearly every front. The 990 Pro pushes past 7000 MB/s reads and carries a 5-year warranty with much higher TBW. The SN850X is similarly faster and better supported. The Micron T710 and Crucial T710 also outclass it on endurance and features. Where the VisionTek has a narrow edge is the 2230 form factor, which none of those full-size 2280 drives can match. If you're upgrading a Steam Deck or a compact laptop, that's a real advantage. For a standard desktop or full-size laptop, there's no reason to pick this over the competition.

Pricing is all over the map. US listings run from USD 294 to USD 378, a USD 84 spread for the same 512GB drive. Best Buy has the low end at USD 294, which is still a lot for half a terabyte. European buyers see EUR 417 to EUR 524, and the Canadian listing at CAD 917 is frankly absurd. For context, you can often find 1TB or even 2TB Gen4 drives from Samsung or Western Digital in the same price range. Paying this much for 512GB with a 1-year warranty is a tough sell unless you specifically need the 2230 size.

The VisionTek DLX4 901558 is a 512GB M.2 2230 PCIe 4.0 NVMe drive that posts a 5200 MB/s sequential read and 4775 MB/s write. Those are solid Gen4 numbers, but the rest of the story is less flattering. It's DRAM-less, carries a 256 TBW endurance rating, and backs it all with just a 1-year warranty. In our database, it lands at 77th percentile for random performance and 73rd for speed, which sounds okay until you look at the feature set and capacity, both sitting at 33rd percentile.

Skip this if you have a standard M.2 2280 slot. The Samsung 990 Pro and WD Black SN850X are faster, more durable, and often cheaper per gigabyte. Also skip it if you do heavy sustained writes, the DRAM-less design and 256 TBW endurance won't hold up. And if you're outside the US, the EUR 417 to EUR 524 and CAD 917 prices are hard to justify for 512GB.

The DLX4 901558 is a niche drive. The 2230 form factor and decent Gen4 speeds make it viable for handhelds and ultra-compact systems, but the 256 TBW endurance, 1-year warranty, and DRAM-less design undercut its long-term value. At USD 294 on the low end, it's priced like a premium drive without premium durability. If you need 2230 specifically, it's one of the few options out there. If you don't, buy something else.