Lenovo’s ThinkStation P520, a heavy-duty, Xeon-only single-CPU tower, offers all the performance, serviceability, and expansion options you should expect in this elite tier of workstations.

Lenovo’s ThinkStation P520 (starts at $1,415; $2,267 as tested) is the computer giant’s flagship single-CPU workstation. It’s ideal for heavy lifting such as graphics design, 3D modeling ...