The fans you have listed are all CPU coolers, meaning they attach directly on top of your CPU and is meant to cool solely that. It won't help with cooling of your video cards.
You should be looking for VGA coolers, which I know nothing of(never had the need since my GPUs came with decent coolers). Here's something to get started, though. http://www.newegg.com/Store/SubCategory.aspx?SubCategory=576&name=VGA-Cooling