haha Uhm .. cooler? I am not quite sure..Low budget people do not need to utilize crossfire or sli. Only high end gamers are the only people who really need it. If you are looking to build a high end gaming machine...I would say the best option is two HD 4870's in CF. After that I am not quite sure I have heard that the new 260's and 280's from nVidia are having some issues for some people. But since you are new to the field I suggest getting only one card and doing a low to mid range budget build until you get yourself accustomed to the parts and procedure of DIY computer builds.