I have a vantec sata raid controller ST-420R and i can configure and install win 7 64 no problem but when I try to add an nvidia GE force 610 card the system will not boot. If I remove the raid card and boot off of the embedded controller with the nvidia card installed it boots fine. With both cards installed it will not boot. I have changed the IRQ's on the BIOS level many times and also reset to default with the same result. As long as the 2 cards coexist in the system it will not boot.