CHIPSET nVIDIA® Quadro® NVS 210S Chipset (North Bridge), nForce 430 (South Bridge)OPERATING SYSTEM Dell recommends: Microsoft® Vista® UltimateMicrosoft® Windows® XP Professional Microsoft® Vista® BusinessMicrosoft ® Windows® XP Home Edition Microsoft® Vista® Home BasicPROCESSOR AMD Athlon™ 64 (up to 3800+ 2.4GHz, 512KB L2 cache)AMD Athlon™ 64 X2 Dual-Core (up to 5200+ 2.6GHz, 2 x 1MB L2 cache)NETWORK CONTROLLER Integrated Broadcom® 5754 Gigabit* Ethernet LAN 10/100/1000 solution with Remote Wake Up and PXE supportSYSTEMS MANAGEMENT Broadcom Full ASF 2.0MEMORYDIMM Slots FourType Dual-channel* shared* DDR2 SDRAM system memory. Unbuffered, non-ECC DIMMs onlySpeed 667MHz or 800MHzModules Types 512-MB, 1-GB, or 2-GB (667MHz only) supported memory modules and speeds may vary by chassisMinimum memory Dual-channel: 1GBSingle-channel: 512MBMaximum memory 8 GB ( 2-GB per channel)Bandwidth 533MHz: Up to 8.5 GB/s dual-channel667MHz: Up to 10.7 GB/s dual-channel800MHz: Up to 12.8 GB/s dual-channelDRIVE BAYS AVAILABLE3 1/2 bay One One One slim-line5 1/4 bay Two One One slim-lineHard Drives Supported Two One OneCONTROLLERS & INTERFACESConnectors Four SATA connectors Two SATA connectorsSupporting one device each Supporting one device eachTwo designated for hard drives One designated for hard driveTwo designated for optical One designated for opticalDrive Interfaces SATA only drives SATA only drives Slim-line optical SATA drivesDell™ OptiPlex™ 740Tech SpecsMINITOWER DESKTOP SMALL FORM FACTOR