I have a P68Z68-V LE motherboard with a single 7850. I'm using one monitor with DVI connected to my GPU, but I have a second, older monitor that has one input, which is VGA. I have an older GPU, a 4670, which I'd like to run my second monitor off of, but I'm having driver issues. I've tried using integrated graphics but it doesn't work. What is my best option to use my second monitor?