Dell inspiron 560 Motherboard, micro ATX?

[Tlight131]

Everything I have read seems to say that this computer has a micro ATX board, is it proprietary? I have DDR 3 and I want to upgrade to the LGA1155, I have 775 now.

Gigabyte Intel Z68 Micro ATX LGA 1155 is the board I was looking at.

 

[Tlight131]

Or are there other mother boards from dell that would be interchangeable that carry the LGA1155 socket. Ive done alot of scouring online and with some local shops, but I haven't found a definite answer to this question.