Comes only with i3-4150 3.5 GHz dual core and 4GB RAM, but i guess one can find deals on Xeon
E3-1226v3 or similar and more RAM.
Lenovo ThinkServer TS140 70A40037UX Tower Server - 1 x Intel Core i3 (4th Gen) i | eBay
E3-1226v3 or similar and more RAM.
Lenovo ThinkServer TS140 70A40037UX Tower Server - 1 x Intel Core i3 (4th Gen) i | eBay