Take out the video card for now.
Unless you hear a beep(post) within 2 seconds of booting up, start unhooking things systematically(with the power off). Each time trying to boot after you disconnect a peripheral.
If you do get video on post, hit delete to get into your bios. Keep your mobo manual handy to navigate the bios.
If you get post after you remove the video card, proceed to install windows and install it later.