The main difference between the IDE and SATA storage connectors is that SATA has a much faster data transfer rate, compared to IDE. SATA connectors usually support transfer rates of up to 6 gigabytes per second compared to only 133 megabytes per second for the IDE.
IDE stands for integrated drive electronics and it has a ribbon like cable with either a 40-pin or 80-pin connector. It was created, in 1986 and was the standard cable connector for mass storage devices until SATA was introduced, in 2003.
SATA, which stands for standard advanced technology attachment, has a narrower cable with a split data and power connections. It has a 7-pin cable and unlike the IDE that has one or more 40- or 80-pin connectors in once cable, SATA has only one connector per cable. The SATA was designed to simplify cabling and overcome the limitations of IDE connectors.
The IDE data transfer interface runs in parallel. This means that in order for a transferred data to be processed, it must be completely streamed into the receiving end. SATA serial connections, on the other hand, transfer the data using a single connection, which significantly cuts the delay in streaming. This is the reason why SATA cables transfer data much faster. Almost all recent computer motherboards and computer hard drives are manufactured with SATA connections.