These legacy systems are over a decade old but can run Windows 7 and Windows 10 at a push.
XP Systems
- OptiPlex GX520 – Windows 7 and 10 (Late 2005)
- OptiPlex GX620 – Windows 7 and 10 (Late 2005)
Early Vista Systems
- OptiPlex 320 – Windows 7 and 10 (Late 2006)
Late Vista Systems
- OptiPlex 330 – Windows 7 and 10 (Late 2007)
- OptiPlex 740 – Windows 7 and 10 (Late 2006)
- OptiPlex 745 – Windows 7 and 10 (Late 2006)
- OptiPlex 755 – Windows 7 and 10 (Mid 2007)