does the motherboard work without the card?
how does it beep? these are special beep codes, just like the morse code.
if you hear long continuous beeps, its missing RAM, check your RAM. its difficult to get such beeps in your case.
if the beeps are one long and three short, repeated by smal intervals its certainly display error. in morse style it could be represented as (-...) it might be the PCI card IRQ is conflicting with some device, especially the display.
remove the card, reset the CMOS RAM and try to boot.
btw you havent specified the BIOS
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