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B85M-G
Motherboard
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E8146 First Edition V1 May 2013 Copyright © 2013 ASUSTeK COMPUTER INC. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”). Product warranty or service will not be extended if: (
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Contents Safety information ...................................................................................................... iv About this guide ......................................................................................................... iv Package contents ....................................................................................................... vi B85M-G specifications summary .............................................................................. vi Prod
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Safety information Electrical safety • To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device. • Before connecting or removing signal cables from the motherboard, ensure that all power
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Where to find more information Refer to the following sources for additional information and for product and software updates. 1. ASUS websites The ASUS website provides updated information on ASUS hardware and software products. Refer to the ASUS contact information. 2. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package. Conventions used in this
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Package contents Check your motherboard package for the following items. Motherboard ASUS B85M-G motherboard Cables 2 x Serial ATA 6.0 Gb/s cables Accessories 1 x I/O Shield Application DVD Support DVD Documentation User Guide If any of the above items is damaged or missing, contact your retailer. B85M-G specifications summary ® TM ® CPU LGA1150 socket for Intel 4th Generation Core i7/ i5 / i3, Pentium , ® Celeron Processors ® * Refer to www.asus.com for Intel CPU support list. ® Chipset Inte
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B85M-G specifications summary LAN Realtek 8111G Gigabit LAN controller ® Audio 8-channel Realtek ALC887-VD2 High Definition Audio CODEC - Supports multi-streaming * Use a chassis with HD audio module in the front panel to support an 8- channel audio output. USB 4 x USB 3.0 ports (2 ports at midboard, 2 ports at back panel) 8 x USB 2.0 ports (4 ports at midboard, 4 ports at back panel) ASUS unique features ASUS DIGI+ VRM: - ASUS DIGI+VRM: Digital Power Design for the CPU - ASUS 3 Phase Power De
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B85M-G specifications summary Internal connectors 1 x USB 3.0 connector supports additional 2 USB 3.0 ports 2 x USB 2.0 connectors support additional 4 USB 2.0 ports 2 x SATA 3.0 Gb/s connectors 4 x SATA 6.0 Gb/s connector 1 x Chassis Intrusion connector 1 x CLRTC jumper 1 x 4-pin CPU QFan connector 1 x 4-pin Chassis fan connector 1 x Front panel audio connector (AAFP) 1 x System panel connector 1 x Speaker connector 1 x LPT Header 1 x S/PDIF Out Header 1 x COM Header 1 x 24-pin ATX power connec
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Product introduction 1 1.1 Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity. • Hold components by the edges to avoid touching the ICs on them. •
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LGA1150 USBPWF CLRTC Place this side towards the rear of the chassis B85M-G 1.2.3 Motherboard layout 1 2 3 3 4 5 19.3cm(7.6in) KBMS CPU_FAN DIGI +VRM ATX12V USB910 USB3_56 1 HDMI ASM 1442 CHA_FAN LAN_USB34 BATTERY 6 AUDIO 7 PCIEX16 RTL 8111G B85M-G 64Mb BIOS PCIEX1_1 8 Super ® Intel I/O SB_PWR B85 PCIEX1_2 ALC 887 SPDIF_OUT CHASSIS SATA6G_4 SPEAKER 9 COM USB1112 USB1314 LPT SATA3G_1 SATA3G_2 AAFP F_PANEL 19 18 17 16 15 14 13 12 11 10 1-2 Chapter 1: Product introduction KB_USBPWR DVI_VGA DDR3 D
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1.2.4 Layout contents Connectors/Jumpers/Slots/LED Page 1. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) 1-14 2. Keyboard and USB device wakeup (KB_USBPWB) 1-11 3. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) 1-16 ® 4. Intel LGA1150 CPU socket 1-3 5. DDR3 DIMM slots 1-7 6. USB 3.0 connector (20-1 pin USB3_12) 1-18 7. Onboard LED (SB_PWR) 1-20 ® 8. Intel B85 Serial ATA 6.0Gb/s connectors (7-pin SATA6G_1~4 [yellow]) 1-17 9. Clear RTC RAM (3-pin CLRTC) 1-10 ® 10. Intel B85 Se
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Unplug all power cables before installing the CPU. • Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the socket contacts are not bent. Contact your retailer immediately if the PnP cap is missing, or if you see any damage to the PnP cap/socket contacts/motherboard components. ASUS will shoulder the cost of repair only if the damage is shipment/ transit-related. • Keep the cap after installing the motherboard. ASUS will process Return Merchandise Authorization (R
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4 C 5 A B 1.3.2 CPU heatsink and fan assembly installation Apply the Thermal Interface Material to the CPU heatsink and CPU before you install the heatsink and fan if necessary. ASUS B85M-G 1-5
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To install the CPU heatsink and fan assembly A 1 2 B B A 3 4 To uninstall the CPU heatsink and fan assembly 2 1 A B B A 1-6 Chapter 1: Product introduction
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1.4 System memory 1.4.1 Overview This motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Module (DIMM) sockets. A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for better performance with less power consumption. The figure illustrates the location of the DDR3 DIMM sockets: Channel Sockets Channel A DIMM_A1 & DIMM_A2 Channel B DIMM_B1 & DIMM_B2 B85M-G B85M-G
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• The default memory operation frequency is dependent on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. To operate at the vendor-marked or at a higher frequency, refer to section 2.5 Ai Tweaker menu for manual memory frequency adjustment. • For system stability, use a more efficient memory cooling system to s
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Support the DIMM lightly with 2 your fingers when pressing the retaining clips. The DIMM might get damaged when it flips out 1 with extra force. 2. Remove the DIMM from the socket. DIMM notch 1.5 Expansion slots In the future, you may need to install expansion cards. The following sub-sections describe the slots and the expansion cards that they support. Unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard com
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1.5.3 PCI Express 2.0 x1 slots This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications. 1.5.4 PCI Express 3.0/2.0 x16 slot This motherboard supports PCI Express x16 network cards, SCSI cards, and other cards that comply with the PCI Express specifications. IRQ assignments for this motherboard A B C D E F G H LAN – – shared – – – – – PCIE x16 shared – – – – – – – PCIE x1_1 shared – – – – – – – PCIE x1_2 – shared – – –
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Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure! • If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. • You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut down and reboot the
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1.7 Connectors 1.7.1 Rear panel connectors 1 2 3 4 5 12 11 10 9 8 7 6 1. PS/2 mouse port (green). This port is for a PS/2 mouse. 2. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices. 3. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub. LAN port LED indications Activity/Link LED Speed LED Activity Link Speed Status Description Status Description LED LED Off No link OFF 10Mbps connec
