The Dell 80 GB Internal Hard Drive offers an ideal data storage solution for your Dell OptiPlex Desktop. It has an 8 MB cache and features 44-pin ATA-6 interface providing maximum transfer rate of up to 100 MBps (Ultra DMA mode 5). In addition, this drive offers 5400 RPM rotational speed for fast data access. The drive supports Self-Monitoring Analysis, and Reporting Technology (S.M.A.R.T) which alerts the system of any negative reliability status conditions. The host systems 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 GX620 Ultra Small Form Factor Syatems. It is supported by Dell Technical Support when used with a Dell system.