Gigabyte GA-990FX - Installing Expansion Cards; Back Panel Connector Details

DuetoCPUlimitations,readthefollowingguidelinesbeforeinstallingthememoryinDualChannelmode.
1. DualChannelmodecannotbeenabledifonlyonememorymoduleisinstalled.
2. WhenenablingDualChannelmodewithtwoorfourmemorymodules,itisrecommendedthatmemory
of the same capacity, brand, speed, and chips be used and installed in the same colored sockets. For
optimumperformance,whenenablingDualChannelmodewithtwomemorymodules,werecommend
thatyouinstallthemintheDDR3_1andDDR3_2sockets.
1-5 Installing an Expansion Card
Readthefollowingguidelinesbeforeyoubegintoinstallanexpansioncard:
• Make sure the motherboard supports the expansion card. Carefully read the manual that came
with your expansion card.
• Always turn off the computer and unplug the power cord from the power outlet before installing an
expansion card to prevent hardware damage.
1-6 Back Panel Connectors
USB 2.0/1.1 Port
TheUSBportsupportstheUSB2.0/1.1specication.YoucanconnectaUSBDACtothisportoruse
this port for USB devices.
PS/2 Keyboard/Mouse Port
Use this port to connect a PS/2 mouse or keyboard.
USB 2.0/1.1 Port
TheUSBportsupportstheUSB2.0/1.1specication.UsethisportforUSBdevices.
USB Type-C
™
Port
Thereversible USB port supports the USB 3.1 specication and is compatible to the USB 3.0/2.0
specication.UsethisportforUSBdevices.
USB 3.1 Type-A Port (Red)
TheUSB3.1portsupportstheUSB3.1specicationandiscompatibletotheUSB3.0/2.0/1.1specication.
Use this port for USB devices.
USB 3.0/2.0 Port
TheUSB3.0portsupportstheUSB3.0specicationandiscompatibletotheUSB2.0/1.1specication.
Use this port for USB devices.
DualChannelMemoryCongurationsTable
DDR3_4 DDR3_2 DDR3_3 DDR3_1
2 Modules
- - DS/SS - - DS/SS
DS/SS - - DS/SS - -
4 Modules DS/SS DS/SS DS/SS DS/SS
(SS=Single-Sided,DS=Double-Sided,"--"=NoMemory)
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