Gigabyte GA-P55A-UD3 User Manual

Hardware Installation - 16 -
1-4-1 Dual Channel Memory Conguration
This motherboard provides four DDR3 memory sockets and supports Dual Channel Technology. After the
memoryis installed,theBIOS will automaticallydetect the specicationsandcapacity of thememory.En-
abling Dual Channel memory mode will double the original memory bandwidth.
The four DDR3 memory sockets are divided into two channels and each channel has two memory sockets as
following:
Channel 0: DDR3_1, DDR3_2
Channel 1: DDR3_3, DDR3_4
1-4 Installing the Memory
Read the following guidelines before you begin to install the memory:
• Make sure that the motherboard supports the memory. It is recommended that memory of the
same capacity, brand, speed, and chips be used.
(Go to GIGABYTE's website for the latest memory support list.)
• Always turn off the computer and unplug the power cord from the power outlet before installing
the memory to prevent hardware damage.
• Memory modules have a foolproof design. A memory module can be installed in only one direc-
tion. If you are unable to insert the memory, switch the direction.
DDR3_2 DDR3_1 DDR3_4 DDR3_3
If only one DDR3 memory module is installed, be sure to install it in the DDR3_1 or DDR3_3 sockets.
DualChannelMemoryCongurationsTable
(SS=Single-Sided, DS=Double-Sided, "- -"=No Memory)
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 DDR3 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 for optimum performance. When
enabling Dual Channel mode with two memory modules, be sure to install them in the DDR3_1 and
DDR3_3 sockets.
DDR3_2 DDR3_1 DDR3_4 DDR3_3
- - DS/SS - - DS/SS
DS/SS DS/SS DS/SS DS/SS
Two Modules
Four Modules

Gigabyte GA-P55A-UD3 Specifications

General

Non-ECC	Yes
Memory voltage	1.5 V
Number of memory slots	4
Maximum internal memory	16 GB
Processor socket	LGA 1156 (Socket H)
Processor manufacturer	Intel
USB 2.0 connectors	2
Number of SATA connectors	8
Number of EATX power connectors	0
Special features	@BIOS Q-Flash Xpress BIOS Rescue Download Center Xpress Install Xpress Recovery2
Controller interface type	iTE IT8720
Controller 2nd interface type	ATA-133/100/66/33
Headphone outputs	6
PS/2 ports quantity	1
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Audio chip	Realtek ALC888
Motherboard chipset	Intel® P55
Audio output channels	7.1 channels
Motherboard form factor	ATX
Compatible operating systems	Win XP, Vista, 7
PCI slots	3
Bundled software	Norton Internet Security
Networking features	10/100/1000 Mbit
RAID levels	0, 1, 10
BIOS memory size	32 Mbit

Weight and Dimensions

Depth	244 mm
Width	305 mm