So, i'm running Win7 64bit and i have my HD6950 2GB as my main card. I also have a GeForce 8400GS 512MB collecting dust somewhere. I could free up one PCIe slot in order to use it. Question here is, what exactly do i need to make this work? And don't say it won't work because 8400gs is too slow. I don't care, i'm just asking how to make it work regardelss of the speed achieved.