Motherboard Problem

I have a ECS K7VMM+ Motherboard and failing to boot.It has an AMI BIOS and beeping 8 times everytime i power up the pc, indicating that i have a bad video memory. The video card is on-board and even i put another video card the beeping still dont stop. I can’t configure the BIOS to boot to my AGP cause it is not booting on my BIOS.