Technology is always evolving in many ways. Serial ATA or SATA is known as one of technology pieces that keeps on evolving and developed. It is known as a computer bus interface that will connect the devices of mass storage to the host of bus adapters. SATA I was the first generation of SATA. Now, there is SATA II (SATA 3Gb/s) as well as SATA III (SATA 6Gb/s). These two dominate the market and many people often confused by the two of them. The question now, which one is better in SATA 3 vs. SATA 6?
SATA II or SATA 3Gb/s (2.x revision) interface is known as the second generation. It runs at 3.0 Gb/s with bandwidth reaching 300MB/s and has backwards compatible with the first generation of SATA, SATA 1.5.
SATA III or SATA 6Gb/s (3.x revision) is the third and latest generation. It runs at 6.0 Gb/s with higher bandwidth up to 600MB/s. Just like SATA 3, SATA 6 has backward compatibility to the interface of SATA 3 or known as the second generation.
Despite of the backward compatibility, both interfaces will have their maximum speed reduced. Back to the initial question, which one is better? Checking the description of each interface, it is obvious that SATA 6 will be the better one. It’s simply faster and more pleasant to be experienced. However, SATA 6 or SATA III needs to be needs to be connected to its original SATA III port. If not, the speed will be decreased. So, when upgrading to SATA III, the brand new motherboard might be needed. SATA 3 or SATA II is not a bad choice but technology started to move on to the faster and better SATA 6. It will be wise to get SATA 6 instead of the previous version. Consider it as an investment.