The m.2 form factor is becoming popular for SSDs due to its small size, and, in PCI-E guise, superior performance. As our recent test of the Samsung 950 Pro m.2 SSD has shown, PCI-E m.2 SSDs offer performance many times that of the very best SATA SSDs, so if you?re looking for a storage upgrade, m.2 is definitely the way to go. While m.2 slots are only available on the latest motherboards, SilverStone Technology's ECM20 m.2 adapter card offers an inexpensive way for older systems to enjoy the performance and space savings of modern m.2 SSDs. Benchmark Reviews tests the ECM20 and compares the performance of a modern m.2 PCI-E SSD on this adapter card with its performance on a native m.2 port.