This issue only started occurring when I did a complete re-install of windows. Not only does the screen image display these corruptions but the system shows and the signal to the monitor is intermittent. A driver clean then re-install can sometimes solve the issue but not permanently. Sometimes things are fine for days, in one case even weeks, but the issue always recurs. The display appears to be fine when Windows is operating in safe mode.
I have tried:
Re-installing display drivers
Re-installing older versions of display drivers
Using Driver Cleaner then re-installing drivers & older versions of drivers
Its not a monitor problem. My Dell 1905FP works perfectly as an extra monitor for my laptop.
I don’t think its a power problem as I have tried booting up with 2 HDDs unplugged and the power to the sound card unplugged.
Its not a compatibility issue as the card has worked perfectly with the motherboard for over a year.