Lenovo Thinkcentre M800 SFF Highly Reliable, Powerful, Compact Desktop. Latest Intel processing technology, Space-saving small form factor, Innovative optional dust filter, Energy-efficient for cost-savings, Optional PCI slot for expansion. The small form factor (SFF) features powerful performance in a compact design, with the expansion ability of a tower. The SFF desktop starts at 9 kg / 19.9 lbs and supports both horizontal and vertical orientations. Maximize productivity with independent display support for up to three monitors. The expanded work area and easier navigation between applications helps reduce errors and improve productivity as you extend your desktop across multiple monitors.