The Asus M5A88-V EVO uses the AM3+ chip set. This is also an AMD 9-series chip set.
The drivers are on the AMD web site. http://support.amd.com/en-us/download
Go to "Manually Select Your Driver" then
Step 1: Select the type of product that you have: select "Chipsets".
Step 2: Select the product family your product belongs to: select "AMD 9-Series Chipsets".
Step 3: Select your product: select "All 9-Series Chipsets".
Step 4: Select the supported operating system that you have: