Expansion Slots 1x PCI Express x16 1x PCI Express x1 2x PCI. Memory 2x 240-pin DDR2 DIMM Dual Channel 800 MHz non-ECC, unbuff 4GB Max. Processor - Intel® Core™2 Duo E7500 (2.93 GHz) Operating Systems - Genuine Windows® 7 Home Basic Chipset - Intel® G41 Express Chipset with ICH7 Memory - 2GB Up to 4GB1 1333MHz Dual Channel DDR3 SDRAM - Note: Memory runs at maximum system supported speed of 1066 MHz Two (2) DIMM slots Primary Storage - 320 GB 7200RPM SATA Hard Drive - All hard drives have 3.0Gb/s interface, DataBurstTM cache and utilise NCQ (Native Command Queing) Optical Drives - 16X DVD-ROM Drive - 16X CD/DVD burner (DVD+/-RW) with double layer write capability - All drives include Cyberlink PowerDVD DX - All write drives include Roxio Creator 10.0 DE Graphics Integrated: - Intel® GMA X4500 - Discrete Graphics options from NVIDIA® : - 512MB NVIDIA® GeForce® G310* (DVI, HDMI) Connectivity Integrated: - 10/100/1000 Ethernet LAN on system board Optional: - 56K PCI Data Fax Modem - Dell 1525 Wireless WLAN 11n PCIe Card Standard I/O Ports - Video: 1 15-pin VGA video connector - USB: 6 externally accessible USB Ports (2 front, 4 back) 2 internal USB ports - Audio: Three back-panel connectors for line-in, line-out, microphone-in, two front-panel connectors for headphone-output and microphone-in - Other: 1 Serial, 2 PS/2 for Keyboard and Mouse, 1 RJ-45 10/100/1000 Multimedia - Dell Media Card Reader - IEEE 1394a Security - Trend Worry-Free Security Service (up to 3 year subscription) - Physical security: Cable lock chassis security slot and padlock loop Backup Options - Dell DataSafe Online Back-up - Dell Backup and Recovery Manager Expansion Slots - PCI: 2 Slots - PCIe x1: 1 Slot - PCIe x16 (Graphics): 1 Slot - Note: Slim Tower supports low profile cards - 3.5" Bays: 2 internal bays - 5.25" Bays: 1 external bay Chassis - Weight & Dimensions: - Height: 14.69" (373mm) - Width: 4.17" (106mm) - Depth: 17.20" (437mm) - Weight: ~12.79lbs (5. Intel Core 2 Duo Quad, Core 2 Dual-Core, Pentium Dual-core.