Gigabyte GA-990XA-UD3 Manual - Page 10
Product Specifications, All PCI Express slots conform to PCI Express 2.0 standard. - amd 9
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1-2 Product Specifications CPU AM3+ Socket: - AMD AM3+ FX processors - AMD AM3 Phenom™ II processors/ AMD Athlon™ II processors (Go to GIGABYTE's website for the latest CPU support list.) Hyper Transport Bus 5200 MT/s Chipset North Bridge: AMD 990X South Bridge: AMD SB950 Memory 4 x 1.5V DDR3 DIMM sockets supporting up to 32 GB of system memory * Due to Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than 4 GB. Dual channel memory architecture Support for DDR3 2000 (O.C.)/1866/1600/1333/1066 MHz memory modules * To support a DDR3 1866 MHz (and above) memory, you must install an AM3+ CPU first. (Go to GIGABYTE's website for the latest supported memory speeds and memory modules.) Audio Realtek ALC889 codec High Definition Audio 2/4/5.1/7.1-channel Support for Dolby® Home Theater Support for S/PDIF Out LAN 1 x Realtek RTL8111E chip (10/100/1000 Mbit) Expansion Slots 1 x PCI Express x16 slot, running at x16 (PCIEX16) * For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot. 1 x PCI Express x16 slot, running at x8 (PCIEX8) * The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot will operate at up to x8 mode. 1 x PCI Express x16 slot, running at x4 (PCIEX4) 2 x PCI Express x1 slots (All PCI Express slots conform to PCI Express 2.0 standard.) 2 x PCI slots Multi-Graphics Support for AMD CrossFireX™ technology (PCIEX16 and PCIEX8) Technology * The PCIEX16 slot operates at up to x8 mode when AMD CrossFireX™ is enabled. Storage Interface South Bridge: - 6 x SATA 6Gb/s connectors supporting up to 6 SATA 6Gb/s devices - Support for RAID 0, RAID 1, RAID 5, RAID 10, and JBOD USB South Bridge: - Up to 14 USB 2.0/1.1 ports (8 ports on the back panel, 6 ports available through the internal USB headers) 2 x Etron EJ168 chips: - Up to 4 USB 3.0/2.0 ports (2 ports on the back panel, 2 ports available through the internal USB headers) Hardware Installation - 10 -