Asus H81M-C User Manual

ASUS H81M-C
1-7
1.4 System memory
1.4.1 Overview
This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Module
(DIMM) sockets. A DDR3 module is notched differently from a DDR or DDR2 module. DO
NOT install a DDR or DDR2 memory module to the DDR3 slot.
According to Intel
®
CPU spec, DIMM voltage below 1.65V is recommended to protect the
CPU.
Channel Sockets
Channel A DIMM_A1
Channel B DIMM_B1
H81M-C
H81M-C 240-pin DDR3 DIMM sockets
DIMM_A1 DIMM_B1
1.4.2 Memory congurations
You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM
sockets.
• You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• Due to Intel
®
chipset limitation, DDR3 1600MHz and higher memory modules on XMP
mode will run at the maximum transfer rate of DDR3 1600MHz.
• Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
• Due to the memory address limitation on 32-bit Windows
®
OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows
®
OS.
- Install a 64-bit Windows
®
OS if you want to install 4GB or more on the
motherboard.
• This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.

Asus H81M-C Specifications

General

Memory slots type	DIMM
Number of memory slots	2
Supported memory types	DDR3-SDRAM
Maximum internal memory	16 GB
Supported memory clock speeds	1066, 1333, 1666 MHz
Processor socket	LGA 1150 (Socket H3)
Processor manufacturer	Intel
Compatible processor series	Intel Celeron, Intel Pentium
S/PDIF out connector	Yes
Number of COM connectors	1
Number of SATA connectors	4
USB 3.2 Gen 1 (3.1 Gen 1) connectors	0
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 ALC887
Component for	PC
Power source type	ATX
Motherboard chipset	Intel® H81
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Windows operating systems supported	Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64
Supported storage drive interfaces	SATA II, SATA III
Maximum resolution	1920 x 1200 pixels
Maximum graphics card memory	1024 MB
Parallel processing technology support	Not supported
Cables included	SATA
LAN controller	Realtek RTL8111G
Ethernet interface type	Gigabit Ethernet
BIOS type	AMI
ACPI version	2.0a
BIOS memory size	64 Mbit

Weight and Dimensions

Depth	178 mm
Width	244 mm