Marvlin..., I'd suspect that running in 64 bit is the culprit, but what you describe sounds more like an issue with the cards running in SLI mode, with P7... This is just a guess, here, but I think the "blink" is when data for the screen is supposed to be coming from a source that doesn't have any... you have to remember that P7 was written long before our current tech and, occasionally, needs to be "coddled". try running without SLI... If that doesn't work, I don't know what to tell you..... Also, did you try at the Hardware forum?

  flags1... MOST backgrounds will be 2D... used like the backdrop in a movie, or on a theatrical stage... Usually, you populate the scene in front of it, and it'll give you the illusion of "more"..... Example: if you want to have a scene in the mountains, you can rent a Cray... Supercomputer, and render the mountains in realtime.... Literally, create the mountains on a computer, or you can use a background. they are usually imported. My best suggestion would be to ask the vendors... they're usually more than willing to explain things. Lou.

"..... and that was when things got interestiing."