Ok I tried SD capturing, and it does work. Also, nothing else is attached to my PCIe slot (Just capture card and gfx card). Here is my motherboard info:
Board: Dell Inc 0PP150 A00
Bus Clock: 1066 megahertz
BIOS: Dell Inc. 1.0.8 07/15/2008
Here is a picture of my current configuration:
https://i46.tinypic.com/2w550fo.jpg