Less than a year after the SD Express standard was announced, the fast PCIe-based technology has come to the tiny microSD form factor. It will use the second row of pins of UHS-II style cards to enable NVMe v1.3 connectivity. microSD Express cards will deliver speeds of up to 985MB/s. For comparison, the fastest UHS-I cards go up to just over 100MB/s, the fastest UHS-II push that to a bit more than 300MB/s. With support for the low-power sub-states (L1.1 and L1.2) of PCIe v3.1, the new cards will actually use less power than classic microSDs, despite being much faster than...
Source: https://www.gsmarena.com/microsd_express_announced_with_up_to_985mb_s_speeds_better_power_effiency-news-35698.php
