[lysis]

in all the versions i have had of nvidia's "detonator drivers" including the 27.20 ones i'm using now, there is an option to display logo when running 3d applications. The default is off though but this is how you get to it:
right click desktop, go to settings, click on advanced, click on the tab that says your video card (for me RIVA TNT2), then click on additional properties - then check if the checkbox for "display logo" is on or off.