SATA Express as Fast As Possible

The video explains why SSDs hit a speed ceiling around 600 megabytes per second when connected via the traditional SATA 3 interface, and how SATA Express attempts to change the game. It starts with a quick history of SATA generations, noting how each revision pushed throughput from roughly 133 MB/s up to 600 MB/s, and explains that further gains are bottlenecked by the electrical power requirements of keeping the SATA connection fast. The presenter then clarifies that SATA Express is not just a faster version of SATA, but a fundamentally different interface because it connects SSDs directly to the PCI Express lanes. This shift means that PCIe, rather than SATA signaling, carries the data, enabling much higher potential speeds that can scale with newer PCIe generations. The discussion covers expected practical performance, with modern implementations potentially achieving from about 1 GB/s to several GB/s, and mentions related standards such as M.2 and NVMe, which optimize storage access for high-speed solid state devices and move away from the older AHCI driver model. The video also addresses the current ecosystem context, noting that at the time of production there were no consumer SATA Express drives available, though some motherboards offered SATA Express ports and backwards compatibility with standard SATA drives. It concludes by pointing viewers toward faster PCIe-based SSD options like PCIe SSDs and M.2 drives for noticeable real-world gains, while acknowledging that the perceived difference may vary by user and workload. A sponsor segment promotes lynda.com for online learning resources, followed by a call to engage with the channel through likes, comments, and subscriptions.

Topics · technology · hardware · computing