What are the standards and speeds of SATA?

SATA (Serial ATA) standards include SATA I (1.5 Gbps), SATA II (3.0 Gbps), and SATA III (6.0 Gbps), with each successive version offering increased data transfer speeds. SATA III is the most common in modern systems and can support devices like SSDs and HDDs. Additionally, there are variations such as SATA Express, which can combine SATA and PCIe protocols for even higher speeds. Overall, while SATA has limitations in terms of speed compared to newer interfaces like NVMe, it remains widely used for storage devices.