Lenovo recommends Windows.

ThinkStation Workstation: E Series

ThinkStation E32: Superior entry-level single-CPU tower

E SERIES. WORKSTATION PERFORMANCE AND RELIABILITY. DESKTOP PRICING.

With the ThinkStation E Series, you can get the performance and reliability you need on a budget you can afford, with up to Windows 8 Pro preloaded on all Lenovo ThinkStation models. E Series is available in both tower and small form factor (SFF) workstations, which provide high-performance Intel® Xeon® processors and error-correcting memory to deliver the professional results you need—at an entry-class price point. Professional results require powerful graphics and the E Series systems support both integrated Intel HD P4600 graphics as well as NVIDIA® Quadro® graphics cards.

E Series also offers a reliable, green workstation solution, with the SFF offering a compact design under 13L. These models, as well as the tower workstations, are environmentally friendly, offering up to 92-percent power efficiency. Equipped with error correcting code (ECC) memory, which virtually eliminates all memory-related failure, E Series workstations support up to 1600 MHz UDIMM memory to boost productivity. Plus, E Series supports the ISV applications you depend on, including Autodesk, Adobe, Dassault Systémes and PTC, Avid and Siemens.