I load gigabyte ga-945gzm-s2 audio driver. Task Bar Shows the speaker icon and HD Audio Manager Icon also. But the Manager Shows that the "Speaker Out" option Disable and the sound of Speaker is Off. I download the Driver file form your site file named - motherboard_driver_audio_realtek_azalia But Now the speaker id off

Baixe e instale o driver de audio. Voc? pode baixar atravez do seguinte link: http://www.easy-share.com/1908977068/Drivers-XP-Audio-Gigabyte-GA-945GZM-S2-(rev.6.6)_www.fontededados.com_.rar
Abra?os

You have Intel chipsets and Realtek sound. The gigabytes link only seems to have audio and lan drivers here;
http://www.gigabyte.us/support-downloads/download-center.aspx
Outlined info
1-Product Catagory-motherboard
2-By Socket-Socket 775
3-By Chipset-Intel 945GZ
4-Product Model-GA-945GZM-S2
Click search and enter you o/s and it will list your updates.
Other updates canbe gotten here;
http://downloadcenter.intel.com/
You can ckick on "Run Intel Update Driver Utility" and Intel will scan your system and suggest and provide updates or, you can search for individual downsloads
1-Product Family-Chipsets
2-Product Line-Desktop Chipsets
3-Select Product Name-Intel 845 Series
A new window will come up to choose your o/s
You may want to check your operation first by clicking "start", then click on "control panel". Find and click on "device manager". Click on box with + next to "sound audio and game controllers". Do you see a warning ?, !, Or a yellow triangle? click on that and follow proceedure. Right click on your device and in the list you should see "disable". If you see "enable" click on that and exit.
Ther should be a speaker icon in your taskbar at lower right of your screen. Right click on it, then click on "open sound mixer" and adjust volume.

Go to this site:

http://www.gigabyte.com/products/product-page.aspx?pid=2564#dl

if your computer came with a motherboard disk the sound drivers could be on it
control panel sounds and audio,volume,advanced,speakers select appropriate speakers or
audio you will find 3 drop down lists make the necessary adjustments there or
control panel,administrive tools,computer management,device manager,sound video and game controllers could be a yellow question mark? right click to re-install drivers

Please click on the link below

http://www.gigabyte.com/support-downloads/download-center.aspx?kw=GA-945GZM-S2

and click on the driver as per your Rev Version (you can find it on the motherboard or the motherboard box.

You can choose the operating system - XP and download the driver.

Gigabyte hasn't made available the Windows 7 drivers for the GA-945GZM-S2 as of yet. You can try to contact them and see if they will eventually provide them:
http://tw2005.giga-byte.com/Company/ContactUs/contact_us.htm

It's possible that the Vista drivers may work, but there is no guarantee on that:
http://www.gigabyte.com/products/product-page.aspx?pid=2425#dl

If you have Vista, you can install the Vista drivers, then try to upgrade to Windows 7 from Vista. Here's a tutorial that may help:
http://windows.microsoft.com/en-US/windows7/help/upgrading-from-windows-vista-to-windows-7

Update your PC's audio drivers.
Download them from
http://ee.giga-byte.com/products/mb/driver/ga-945gzm-s2_21.html

http://www.nodevice.com/driver/GA-945GZM-S2__rev__3_0_/get45669.html
go here.. http://www.gigabyte.com.tw/products/product-page.aspx?pid=2603&dl=1#driver or here

in the bios because you set HD audio to audio it may be that you need to download the HD Audio driver from microsoft

put your hand on chip of your sound card on board if its hot so sure you need to disable and buy sound card or replace this chip also check audio jumper on board and try to install windows again and install the driver if u see on task bar sound volume icon check by tested headphone if there is out sound or no i wish i helped u