Should go as smooth as silk. See my Batman build description for more info.It's been a while...
Finally decided to update my system to OS X Mavericks.
I'll be posting my experiences on upgrade process.
Good Luck to me...
Update July 2015- this build is almost 6 years old and still runs the latest OS X.
http://www.tonymacx86.com/yosemite-desktop-guides/154315-update-gigabyte-p55-user-builds.html
i would be very interested in this too......has anyone been able to get El Capitan running on this build?