... Because the data rate remains well below 200 MB / sec. and brakes of a modern SSD. The backward compatibility to PCIe 1.0 is all well and good, just does not make sense if you want to use (600 MB / sec.) SATA III. The SSD will depend now on the SATA II controller onboard, where the SSD after all, about 270 MB / sec. can shovel. It may be a good product, but not for PCI Express 1.x.