Dumb question here??,, did you turn off the integrated video??
If you did then,you have a hardware conflict !!,what you need to do is to bench the mobo on a clean non conductive surface,are the voltage requirements of your ram sticks the same,try each of them singly,IRQ,is an interrupt request layer error,both ram and video use an irq which should give you an idea as to where to look,can you borrow/loan another video card or test your card in another setup..:)