but once W7 loads screen goes blank.
Try a different monitor with the DVI output from the 9800GT to confirm the problem stems from the Acer monitor. Also, try plugging both the DVI and the VGA connectors into the monitor from the video card at the same time. The monitor worked with the DVI connector on another operating system other than Windows 7? The proper Windows 7 video card driver must be installed, if that is the case.Latest 9800GT Windows 7 driver available here.