Designed to effectively address your data-intensive needs, the 400 GB Internal Hard Drive from Dell offers an ideal storage solution for your Dell Dimension Desktop System. It has an 8 MB data buffer and features Serial ATA interface - providing maximum transfer rate of up to 150 MBps. With a spindle speed of up to 7200 rpm, this drive ensures fast and efficient data transfer. The drive also supports Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.) which alerts the system of any negative reliability status conditions. The host system can then alert and advise users on taking appropriate actions to avoid potential system failure or downtime. This product has been tested and validated on Dell systems to ensure it will work with your computer and is compatible with Dell Dimension 8300 Desktop System.