So I just got done building my first PC, everything went smoothly and ran right away. However, when I tried to crossfire my two HIS HD4850's I get an error when I exit BIOS (after I switched the setting to PEG) and when windows loads. Now some times windows will not even load and after the main screen it just goes black. When it does load it goes to safe mode and says "his hd 4800 error unable to complete a drawing operation". Problem is fixed when I remove the crossfire bridge and restart the computer. I have installed the latest drivers to no avail. Any help would be appreciated.