Re: hang on install driver 7990

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?

im using seasonic 600w 80+ its enough?

Haven't heard that brand before, although, I don't think your PSU is enough to handle that card, depending on what CPU you have and what other devices you have mounted. (Ram Dimms, Fans, HDDs etc)
The recommended power supply for your card is 700 Watts, I'd really advise you against using your current PSU, it's probably the reason your card is not functioning. Check the link below to see for yourself.
http://www.realhardtechx.com/index_archivos/Page362.htm