Has anyone come up with a fix for the blackscreen at login with the 4800 series cards?
I am losing my F'ing mind!! I have tried xp pro x32 , Vista Ultimate x32, and now Windows 7 x64 all clean installs and drivers, latest BIOS etc.. still nothing!!!
AMD Phenom X4 9850BE
4 GB Corsair Dominator 6800
3 Seagate SATA HDD 600 GB total
Asus M3A32 MVP Deluxe Mobo
2x HIS Radeon HD 4850 DDR3 512MB(was attempting in crossfire mode but with blackscreen problem......)
both cards have own independent power 6 pin power cable.
Monitor is Westinghouse LCM-22W2
My issue started while running Vista Ultimate x32 when I updated the drivers to CCC 9.6 from the original set that came with my cards. The problem I was having with them was I could not get CrossfireX running properly so I thought new drivers so wiped all old drivers ran driver sweep etc.. installed new drivers and bang blackscreen if I start in safe mode it works, so I did a clean install of XP pro and same thing with new drivers, so switched to 7 Ultimate x64 and same f'ing thing. Every install was a clean formatted HDD.
I have tried DVI, HDMI, RGB only thing I haven't tried is S-Video.
Have you tried the old drivers again just to see if you can get that working? Do you have another monitor (or even TV with S-Video) you could try? Edit: Also, does HIS have any drivers specifically for your card on their website?