What resolution is being outputted when connecting from the PCI express graphics card, are you outputting 1920x1080?
I don't think it would be a PCI express problem that would cause fonts to be fuzzy, is everything else okay? It might be ClearType fonts not set up correctly, ClearType can give a slightly fuzzy effect to fonts, or your AMD graphics settings are not correct, for example it might be set thinking it is being displayed on a TV screen and applying some overscan, which zooms in slightly and will cause fine details to look less sharp.
For ClearType, assuming Windows 7, click Start and type ClearType and turn it off and see if that improves things.
already tried this
clear type on or off, tried every possible thing in the amd catalyst control center - the blurred text problem persists when the screen is connect to the pci/e card
any other ideas ?