SATA Express : 8 et 16 Gb /s
Written by Marc Prieur
In terms of speeds, cables using 1 or 2 PCI Express 3.0 links will give 8 and 16 Gb/s compared to 6 Gb/s at best for Serial ATA. Better still, as PCI-Express 3.0 uses 128/130b encoding in place of 8/10b encoding, in practice we’ll be going from 600 MB/s to 1 GB/s or even 2 GB/s.
As presented, the SATA Express motherboard connector would be able to link up to one SATA Express (x1 or x2) peripheral or two Serial ATA peripherals, with versions that are only compatible with SATA Express peripherals also being studied.
With the fastest SSDs already having reached the limits of SATA 6 Gb/s, the announcement of the development of a new interface was expected. The use of the PCI-Express interface, which is reminiscent of OCZ’s HSDL initiative, is a surprise but using what is an already existing technology should simplify the development of SATA Express. It remains to be seen when it will arrive in our machines!
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