My build is a AMD a10-7800 on a a88x MB.
Can confirm on Windows 7 monitors expand just fine.
Only thing I have done was move my pc to a new case in prep for upgrade in a few months (hopefully)
Other than that no issues whatsoever
It can mirror displays for those wondering, but when I try to setup the expansion screens just tear like crazy.
Have run updates on single to rule out needing updates. I'm stumped guys
EDIT: All good now, mod please close