My PC has just the one PCIe slot, and its the one at the top. These newer double slot cards look like they need the second to top slot being PCIe, with the one above needing nothing but the vents at the back... So, can I put one of these in or not? Yes, I am a complete noob at these kind of things, my current graphics card is about as complex as a stick of RAM. Put in slot, turn on, image is on screen. Yay!

With Reg hardware having the whole Q&A theme these days I thought I might as well ask here! Thanks if you can tip me off ;-)