Model:Dell OptiPlex 755 MT - Mini Tower Operating System Info:WINDOWS 10 PRO 64 BIT Chipset:Intel Q35 Express Chipset (ICH9DO) Processor:Core 2 Quad Q6600 @ 2.40 GHz Memory Installed:8 GB DDR2 Memory Supported:4 DIMM slots DDR2 Synch DRAM Non-ECC Memory (667/800Mhz) up to 8GB Hard Drive:80GB Optical Drive:DVD-RW Graphics:Integrated Intel Graphics Media Accelerator 3100 Audio:ADI 1984 High Definition Audio Networking:Intel 82566DM Gigabit LAN 10/100/1000 Chasis: Number of Bays:2 internal 3.5 in; 1 external 3.5 in; 2 external 5.25 in Expansion Slots:2 PCI; 1 PCIe x16; 1 PCIe x1; 1 Flexbay (for Media Card Reader); 5 SATA Ports:10 USB 2.0 ports; 2 front; 6 back & 2 internal; 1 Serial; 1 Parallel; 1 RJ-45; 1 VGA port; Stereo in (front); speakers out (back); mic in (front); headphone (front); Power Supply Unit:Standard 305W PSU Dimensions: 16.10" high x 7.36" wide x 17.52" deep System Weight: 25.80 lbs Warranty: 365 days