Lenovo Desktop PC K450E (57331216) Intel Core i7 4790 (3.60GHz) 12GB DDR3 1TB HDD 128 GB SSD NVIDIA GeForce GTX 750 Ti 2 GB Windows 8.1 Pro with downgrade rights to Windows 7 Professional Gaming Desktops - Newegg.com
Lenovo IdeaCentre K230 Gaming Tower PC Quad Core 2.6GHz 8GB 256GB GTX 750 Ti W10 | eBay