Key Benefits • Affordable solution for adding two eSATA ports to your computer • Supports single and multi-bay SATA drive enclosures, including those with port multipliers or hardware RAID controllers • Supports up to 10 disk drives • Supports hot-swapping of drives • Supports Sonnet-exclusive locking eSATA data cables Pure Performance. Pure Satasfaction! When it comes to data storage capabilities, which do you prefer, raw storage capacity or scorching performance? With Sonnet's Tempo™ SATA E4P, you get the best of both worlds! This card offer unprecedented scalability through its support of port multipliers—it can handle up to twenty drives! Used with high-performance drive enclosures like Sonnet's Fusion™ D500P, port multipliers manage the data flow of up to five drives in one enclosure through a single cable. Using today's highest-capacity drives, you can connect an astounding 40 Terabytes (40,000 Gigabytes!) of storage! Mac & PC Compatibility For complete Mac and PC compatibility list, visit product's webpage.