I recently enabled Hybrid SLI in my BIOS (geforce 9300 iGPU with my 8800GT discrete GPU), and since then, my monitor's been excessively bright and werid, the fonts look blurred, and the crystal clear clarity is gone. Everything looks "beefy" and the colour is un-natural. I played around with colour and vibrance settings in the Nvidia control panel, even restored defaults but to no avail.
Perhaps the resolution is screwed up? Try testing those settings. Also check the settings on the actual monitor, set it to auto adjust. The font issue may happen if the monitor itself is not adjusted properly!