DOWNLOAD FREE DRIVERS FOR MY GIGABYTE MOTHERBOARD : GA-81865GNE-775-RH

Maybe you wrong type the model name, there is no GA-81865GNE-775-RH but GA-81865GME-775-RH (with M not N). if i am correct, try to visit this page:
for rev. 1.x: http://www.gigabyte.com/products/product-page.aspx?pid=2358&dl=1#driver
for rev. 2.0: http://www.gigabyte.com/products/product-page.aspx?pid=2449&dl=1#driver
for rev. 6.6: http://www.gigabyte.com/products/product-page.aspx?pid=2562&dl=1#driver
for rev. 3.9: http://www.gigabyte.com/products/product-page.aspx?pid=2568&dl=1#driver

hope this useful, regard riyan.

Drivers?

Always get your drivers and specific software from the manufacturer of your Laptop, Notebook or Desktop. They are usually free of charge.

If you were to log on to the manufacturer's web site, usually one is able to download if available, by model number, All available Driver downloads as required.

If the driver is not available, perhaps your manufacturer does not support the OS you are installing.

This is the best way of ensuring up to date drivers for your system and they are free of charge!

I hope this helps.