Gigabyte Motherboard GA-990X- Gaming SLI (rev. 1.0) User Manual English (version 1002)
Summary
Power your build with the GA-990X-Gaming SLI Motherboard, designed for enthusiasts demanding high performance. This comprehensive user manual is your essential guide for system integration and advanced setup. It covers everything from physical hardware installation—including CPU mounting and memory configuration—to deep BIOS management. Readers will learn how to optimize power settings, configure RAID arrays, install drivers correctly, and utilize every feature of the motherboard. Perfect for experienced PC builders seeking full control over their gaming rig's performance parameters.
Page 1 Text Content
GA-990X-Gaming SLI
User's Manual Rev. 1002 12ME-990XGMS-1002R
For more product details, please visit GIGABYTE's website.
To reduce the impacts on global warming, the packaging materials of this product are recyclable and reusable. GIGABYTE works with you to protect the environment.
Page Summary Contents For Gigabyte Motherboard GA-990X- Gaming SLI (rev. 1.0) User Manual English (version 1002)
Page 1
GA-990X-Gaming SLI User's Manual Rev. 1002 12ME-990XGMS-1002R For more product details, please visit GIGABYTE's website. To reduce the impacts on global warming, the packaging materials of this produc...
Page 2
Motherboard GA-990X-Gaming SLI Motherboard GA-990X-Gaming SLI Feb. 15, 2016 Feb. 15, 2016 Copyright © 2016 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved. The trademarks mentioned in this manual a...
Page 3
Table of Contents GA-990X-Gaming SLI Motherboard Layout ....................................................................4 Chapter 1 Hardware Installation .............................................
Page 4
GA-990X-Gaming SLI Motherboard Layout CPU_FAN KB_MS_USB ATX_12V R_USB Socket AM3+ ASMedia® USB 3.1 Controller R_USB31 PWR_FAN R_USB30 USB_LAN ATX Intel® Gb E LAN AUDIO PCIEX1_1 (Note) AMD 990X DD R3 _...
Page 5
Chapter 1 Hardware Installation 1-1 Installation Precautions The motherboard contains numerous delicate electronic circuits and components which can become damaged as a result of electrostatic dischar...
Page 6
1-2 Product Specifications CPU AM3+ Socket: AMD AM3+ FX processor AMD AM3 Phenom™ II processor/ AMD Athlon™ II processor (Go to GIGABYTE's website for the latest CPU support list.) Hyper Transport Hyp...
Page 7
USB South Bridge: - 12 x USB 2.0/1.1 ports (6 ports on the back panel, 6 ports available through the internal USB headers) VIA® VL805 chip: - 4 x USB 3.0/2.0 ports (2 ports on the back panel, 2 ports ...
Page 8
BIOS 2 x 32 Mbit flash Use of licensed AMI UEFI BIOS Support for Dual BIOS™ Pn P 1.0a, DMI 2.7, Wf M 2.0, SM BIOS 2.7, ACPI 5.0 Unique Features Support for APP Center * Available applications in APP C...
Page 9
1-3 Installing the CPU Read the following guidelines before you begin to install the CPU: Make sure that the motherboard supports the CPU. (Go to GIGABYTE's website for the latest CPU support list.) A...
Page 10
Dual Channel Memory Configurations 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, "- -&qu...
Page 11
Center/Subwoofer Speaker Out Use this audio jack to connect center/subwoofer speakers in a 5.1/7.1-channel audio configuration. Rear Speaker Out This jack can be used to connect rear speakers in a 4/5...
Page 12
1-7 Internal Connectors 1) ATX_12V 9) F_AUDIO 2) ATX 10) SPDIF_O 3) CPU_FAN 11) F_USB30 4) SYS_FAN1/2 12) F_USB1/F_USB2/F_USB3 5) PWR_FAN 13) COMA 6) SATA3 0/1/2/3/4/5 14) TPM 7) M2F_20G 15) BAT 8) F_...
Page 13
DEBUG PORT DEBUG PORT 1/2) ATX_12V/ATX (2x4 12V Power Connector and 2x12 Main Power Connector) With the use of the power connector, the power supply can supply enough stable power to all the component...
Page 14
DEBUG DEBUG PORT PORT 3/4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers) The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin (SYS_FAN1) and a 3-pin (SYS_FAN2) system fan headers, and a 3...
Page 15
F_USB30 F_ U F_ F_ F_USB3 F 7) M2F_20G (M.2 Socket 3 Connector) The M.2 connector supports M.2 SATA SSDs and M.2 PCIe SSDs. It can support SATA RAID configuration through the AMD South Bridge. Please...
Page 16
DEBUG PORT 8) F_PANEL (Front Panel Header) Connect the power switch, reset switch, speaker, chassis intrusion switch/sensor and system status indicator on the chassis to this header according to the p...
Page 17
10) SPDIF_O (S/PDIF Out Header) This header supports digital S/PDIF Out and connects a S/PDIF digital audio cable (provided by expansion cards) for digital audio output from your motherboard to certai...
Page 18
13) COMA (Serial Port Header) The COM header can provide one serial port via an optional COM port cable. For purchasing the optional COM port cable, please contact the local dealer. F_USB30 F_ U F_ F_...
Page 19
16) CLR_CMOS (Clear CMOS Jumper) Use this jumper to clear the BIOS configuration and reset the CMOS values to factory defaults. To clear the CMOS values, use a metal object like a screwdriver to touch...
Page 20
2-1 Startup Screen The following startup Logo screen will appear when the computer boots. (Sample BIOS Version: F1a) Function Keys On the main menu of the BIOS Setup program, press arrow keys to move ...
Page 21
M.I.T. Current Status This screen provides information on CPU/memory frequencies/parameters. Advanced Frequency Settings BCLK Clock Control Allows you to manually set the CPU base clock in 1 MHz incre...
Page 22
Core C6 State (Note 1) Allows you to determine whether to let the CPU enter C6 mode in system halt state. When enabled, the CPU core frequency will be reduced during system halt state to decrease powe...
Page 23
Channel A/B Timing Settings This sub-menu provides memory timing settings for each channel of memory. The respective timing setting screens are configurable only when DRAM Timing Selectable is set to ...
Page 24
Silent Allows the fan to run at slow speeds. Manual Allows you to control the fan speed under the Slope PWM item. Disabled Allows the fan to run at full speeds. Slope PWM Allows you to control the sys...
Page 25
2-4 BIOS Features Boot Option Priorities Specifies the overall boot order from the available devices. Removable storage devices that support GPT format will be prefixed with "UEFI:" string o...
Page 26
CSM Support Enables or disables UEFI CSM (Compatibility Support Module) to support a legacy PC boot process. Always Enables UEFI CSM. (Default) Never Disables UEFI CSM and supports UEFI BIOS boot proc...
Page 27
To cancel the password, press <Enter> on the password item and when requested for the password, enter the correct one first. When prompted for a new password, press <Enter> without enterin...
Page 28
On Chip SATA Port4/5 Type (SATA3 4/SATA3 5 connectors) This option is configurable only when On Chip SATA Type is set to RAID or AHCI. Configures the operating mode of the integrated SATA3 4~SATA3 5 c...
Page 29
Trusted Computing Security Device Support Enables or disables Trusted Platform Module (TPM). Set this item to Enable when a TPM device is installed. (Default: Disable) Super IO Configuration Serial Po...
Page 30
2-6 Power Management Resume by Alarm Determines whether to power on the system at a desired time. (Default: Disabled) If enabled, set the date and time as following: Wake up day: Turn on the system at...
Page 31
Power On Password Set the password when Power On By Keyboard is set to Password. Press <Enter> on this item and set a password with up to 5 characters and then press <Enter> to accept. To ...
Page 32
Load Optimized Defaults Press <Enter> on this item and select Yes to load the optimal BIOS default settings. The BIOS defaults settings help the system to operate in optimum state. Always load t...
Page 33
B. Configuring SATA controller mode in BIOS Setup Make sure to configure the SATA controller mode correctly in system BIOS Setup. For the BIOS Setup menus, refer to Chapter 2, "BIOS Setup," ...
Page 34
C-2. Configuring Legacy RAID ROM Enter the RAID BIOS setup utility to configure a RAID array. Skip this step if you do not want to create RAID array on the SATA controller. Steps: After the POST memor...
Page 35
3-2 Drivers Installation Before installing the drivers, first install the operating system. (The following instructions use Windows 8.1 as the example operating system.) After installing the operating...
Page 36
Regulatory Statements Regulatory Notices This document must not be copied without our written permission, and the contents there of must not be imparted to a third party nor be used for any unauthoriz...
Page 37
FCC Notice (U.S.A. Only) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide rea...
Page 40
Contact Us GIGA-BYTE TECHNOLOGY CO., LTD. Address: No.6, Baoqiang Rd., Xindian Dist., New Taipei City 231, Taiwan TEL: +886-2-8912-4000, FAX: +886-2-8912-4005 Tech. and Non-Tech. Support (Sales/Market...
Manual Details
| Brand | GIGABYTE |
|---|---|
| Pages | 40 |
| File Size | 11.60 MB |
| Published | May 31, 2026 |
84 views
Enter the captcha to get the download link:
Frequently Asked Questions
How do I learn more about the product?
Visit GIGABYTE's website at http://www.gigabyte.com or use their eSupport site.
Where can I check my motherboard revision number?
Look for "REV: X.X." on the board; this is important before updating the BIOS or looking up technical info.
What should I read first when setting up the product?
Read the Quick Installation Guide and carefully review the User's Manual for proper use.
Which slot limitation should I be aware of?
The PCIEX1_1 slot can only accommodate a shorter PCI Express x1 expansion card.