No sorry a mATX will not fit. http://www.newegg.com/Product/Product.aspx?Item=N82E16811345017
Motherboard Compatibility Mini-ITX
This board supports your processor and will fit.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157464&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
No sorry a mATX will not fit. http://www.newegg.com/Product/Product.aspx?Item=N82E16811345017
Motherboard Compatibility Mini-ITX
This board supports your processor and will fit.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157464&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=