Refurbished: Dell Precision T3500, Intel Xeon W3530 2.8GHz Quad Core CPU, 12GB memory, 500GB hard drive, NVIDIA GeForce GTX 660 SuperClocked, Windows 7 Professional Installed - Newegg.com
Upgrade Dell Precision T3500 to "Decent enough" gaming machines - CPUs, Motherboards, and Memory - Linus Tech Tips
Dell Precision T3500
Amazon.com: Dell Precision T3500 Tower High Performance Business Desktop, Intel Core XEON-W3550 3.06GHz up to 3.33GHz, 12GB RAM, 500GB HDD, 256GB SSD (Boot), DVD, Windows 10 Professional (Renewed) : Electronics