HP

HP Z230 TWR 400W 92% eff. Chassis Intel Core i7-4790 3.6Ghz, 8M cache GT2 Quadcore Win8.1 Pro 64 downgrade to Win7 Pro 32/64 4GB DDR3-1600 (1x4G) RAM - nECC 1TB 7200 RPM SATA NVIDIA Quadro K620 2GB 1st GFX Spl Intel Ethernet I210-T1 PCIe NIC (dual LAN) HP  Serial/Parallel Port Adapter Kit HP DVI to VGA Adapter HP USB Keyboard & Optical Mouse Slim..

HP Z440 Workstation HP Z440 700W 90Percent Efficient Chassis Intel® C612 Chipset Win8.1 Pro 64 downgrade to Win7 Pro 64 Intel Xeon E5-1620v3 3.5 10M 2133 4C CPU 8GB DDR4-2133 (1x8GB) RegRAM NVIDIA Quadro K620 2GB 1st GFX HP 1TB SATA 7200 1st HDD HP USB Standard Keyboard HP USB Mouse HP 15-In-1 Media Card Reader HP 3/3/3 Warranty HP Solenoid Hood L..