I have the same board (A7M266) and the same Proc and was getting what I thought were higher than normal temps. It normally ran in the upeer 50's and then under load it would hit ~60 or 61.
I bought another proc and it runs at the same temp. I thought maybe that first device came from a 'hot' lot, but this other one from a totally different source runs at almost the same temp.
I am cooling it with a Taisol CGK742092B and some Artic Silver II. I have several case fans and having the case open makes maybe a 1 degree temp difference.
I am using the supplied Asus software, I have even confirmed my temp readings using hmonitor. It reads about the same, within a degree or so.