I just "built" a new computer, Win7 Pro and installed a HIS Radeon 6450 graphics card in pcie x16 slot and a sound card in one pcie x1 slot. I have 1 pcie x1 slot open and a pci slot. I will run 2 monitors off the 6450 I alread bought and need advice on second card, and slot location. Thanks in advance. One last thing, the second card needs to supply two monitor support.