my old graphic card is radeon hd 4890 , it work properly with the i7 860 and 8 gb of ram ( motherboard : biostar h55 hd ) i play gta v medium setting , i upgrade my card to gtx 680 but when i instal the lastest driver for gtx 680 its not working : when the windows start and when it show me the cursor in the black screen it take a few min to star the windows ... when windows start its like no graphic card instaled and when i enter to peripheral manager ( gestionnaire de périphérique ) it show me the gtx 680 driver with the yellow econ , the last driver for gtx 680 version is 24.21.13... but there is a version it worked for me its the 9.18.13... driver , it work but some games not working properly with this old driver , please guys i need help