The WD Blue SN5100 showed just how much speed there is in PCle 4.0 technology - and pushed it to its limits. This also applied to the PNY CS3250, which delivered top values with PCle 5.0 technology. If you want maximum speed reserves and have a computer with PCle 5.0 technology, go for the PNY - everyone else will do very well with the WD Blue SN5100.

With the SN5100, Sandisk proves that you don't need many flash chips for a 2 TB SSD: Just one of them sits on the very tidy-looking circuit board, the only other active component is the in-house controller. Little information is available on the Polaris model: four 16-nanometre Arm cores, four flash channels with 2400 MT/s...

The new SSD from WD delivers the values achievable with PCIe 4.0 and has a reasonable price. The new QLC memory also ensures significantly higher write rates.