I've been trying to download the drivers, etc for this motherboard - but unfortunately ASUS has overloaded server that are likely located somewhere in some other country.http://usa.asus.com/...;searchkey=P5K3
I've been trying to click on "Download" on this page but keep getting problems connecting to the server.
Alternately, you can try ASUS's FTP site:ftp://ftp.asus.com/pub/ASUS/
The motherboard drivers/BIOS/etc should be located in the /mb folder. Unfortunately - there's not good documentation on the FTP site as to WHICH motherboard / files you need to download for the specific model.
Perhaps you'll have better luck access these files via ASUS's http site tha I did.
I'm thinking, based on many of the posts I've read here that downloading the MB specific BIOS updates and SATA drivers from ASUS's site might be your best bet.
Hope this helps.