I lately buy a apply graphic card from CEX. It is an ATI Radeon 512MB 4850 HD GDDR3 graphic card. I downloaded and set up the woods from net. It was opearating nice but later on sometime I discovered a strange matter when I undertook to open a Winrar file. The matter was that the screen apply to go blank when I open Winrar file. Presently I am apply main board graphic card and display woods are not useable.