i'm taking a bit of a guess as to what your problem actually is, but is your monitor plugged in to the GPU or onboard video?
plugged in to gpu
detail like this :
i have installed the amd driver at my computer, maybe 17.xx so the driver automatic install, then my computer blank.
i try uninstall using Display driver uninstaller at safe mode and download the new driver from amd site, but get error again in mid instalation, my computer get blank, i dont know why..
must i use windows 7 to use 7990?
The 17.xx drivers are one of the latest ones, uninstall your current drivers using DDU software and then try to install 16.12 drivers, check if that works. Also, what PSU are you using?