I have a ASUS M4A89GTD board and a GeForce GTX 460 in PCI port 1. If I plug in the "VGA-Switch-Card" in PCI port 2 the PC wont boot and the red DRAM LED will flash. Without that card plugged in the system boots normally but GPU-Z tells me that my graphics card only runs on PCI-e x8 v1.1. How can I make the GC run at x16?