4 ms·
Not quite. PCIe is just the bus transport protocol. The PCIe SSDs still need a protocol to describe data operations to and from the OS to the Drive. Currently,
by ColinDabritz 12y ago
Not quite. PCIe is just the bus transport protocol. The PCIe SSDs still need a protocol to describe data operations to and from the OS to the Drive. Currently, they use the same protocols as those designed for HDDs, and those protocols make a lot of tradeoffs and assumptions about disk access time. The reason NVMe is exciting is that it is a brand new data protocol, designed with low latency SSD style storage in mind. We're already seeing speeds much higher than existing PCIe SSDs can manage (3+ GB/s!)