Ihave a new COMPAQ SR 5249 PC it has a ATI RADEON HD 400 PRO card installed, i have 2 EIZO FLEX SCAN L675 MONITORS the manufacturers tell this card will not run 2 monitors simultainiously.I have now got aXF GFORCE 6600 DUAL DVI PCI EXPRESS 256MB CARD, WHEN I INSTALL THE CARD THE PC WILL NOT BOOT UP, IF I TRY TO DOWNLOAD THE DRIVERS WITH THE RADEON CARD THE COMPUTER WILL NOT DOWNLOAD THEM AS IT CANT FIND MATCHING HARDWARE ALL I WANT TO DO IS RUN 2 MONITORS CAN ANYONE HELP, BUZZ