Question: are sata 3 ssd compatible with sata2?
Answer: Yes the SSD will work in your computer, SATA 3 drives are backwards compatible with SATA 2 ports. If you're using a mechanical HDD now, an SSD will be a giant leap forward, regardless of whether you're using SATA 2 or SATA 3. You don't need any other cables if you're planning to replace your current drive.