Hi. I dunno why but I CANT install the drivers in Vista x86 of my HD 4850 (Sapphire Dual Slot). Clean installation of Vista, then I install the latest 9.5 drivers (tried 9.4 too), the installation occurs with zero probs, but after the restart my lcd goes into "sleep mode" (right before entering to the OS), the system seems to still function but the monitor goes black, also the OS boot up normally under safe mode, so It must be the driver. The card works FINE in XP SP3. Any ideas why it happens???? THX. PARTIALLY SOLVED It seems that this issue is very common and It's related only to the HD4800 series. For some reason the DVI interface doesn't work with windows Vista (only vista, XP work ok with DVI), using a VGA interface solved the problem to me. Changing the DVI for VGA in the OS doesn't do anything, plugging it both in the OS and ATi CCC said the cable is plugged correctly, but my monitor says all the contrary. I really dunno WHY THE HELL ATi launched drivers that have this BIG issue??? (I say drivers 'cause I tried 9.3, 9.4 and 9.5 and all did the same). Now I'll be stuck with the VGA interface 'till ATi releases a hotfix or hoping It'll be solve in the next release. I used to think that ATi have a great line of vid cards and drivers...now with this I'm not too sure.