It is not. It is for Intel Sandy Bridge and Ivy Bridge processors (http://www.gigabyte.com/products/product-page.aspx?pid=4150#ov), which would offer substantial performance gains over the older Phenom x4 9850. I am an admitted AMD fan, but if you are seeking a performance gain, look for newer.
If you are just seeking a replacement board, look for something labeled "AM2+", which you'll likely have to find on an auction site or somewhere used. If you have a budget, there are many people who could recommend a computer build. Just a thought.
Sorry, my answer did not post...