Re: no bios beep
Are you still using AGP graphics card? I'm not too familiar with Radeon, or any of the ATi lines of video cards. When you plug in your monitor to the onboard graphics card, try to access the computer's BIOS. Usually, you tap the Delete key to access it upon startup. From there, find your graphics card setting and disable the onboard and accept it. Then plug your motherboard to the back of your new video card and see what happens.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?