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Model Brand ECS Model A790GXM-AD3 Supported CPU CPU Socket Type AM3 CPU Type Phenom II FSB 2600MHz Hyper Transport (5200 MT/s) Chipsets North Bridge AMD 790GX South Bridge AMD SB750 Memory Number of Memory Slots 4×240pin Memory Standard DDR3 1333 Maximum Memory Supported 32GB Channel Supported Dual Channel Expansion Slots PCI Express 2.0 x16 2 PCI Express x1 2 PCI Slots 2 Storage Devices PATA 2 x ATA100 4 Dev. Max SATA 3Gb/s 6 SATA RAID 0/1/5/10 Onboard Video Onboard Video Chipset ATI Radeon HD 3300 Onboard Audio Audio Chipset Realtek ALC888 Audio Channels 8 Channels Onboard LAN LAN Chipset Realtek 8111C Rear Panel Ports PS/2 2 Video Ports D-Sub HDMI 1 x HDMI USB 6 x USB 2.0 eSATA 1 x eSATA 3Gb/s S/PDIF Out 1 x Optical Audio Ports 5 Ports Onboard USB Onboard USB 3 x USB 2.0 headers support additional 6 USB ports Physical Spec Form Factor ATX Dimensions 305mm x 244mm (12" x 9.6") Power Pin 24 Pin