hi, ive taken some photographs of my machine. Ive noticed there are some screw holes near the bottom of the case labelled 'ATX only' and my motherbaord is not attached to them, but i noitced also where my mobo is attached, there is the word 'ATX' and something else above it i cant see, could say micro atx i dont know, then i noticed in my manual it says 'ATX power connecter' but there isnt anywhere with BTX , only ATX so i presume that my mobo is ATX or micro ATx 9it is small, look at pics)
http://img122.imageshack.us/img122/3641/img0116jj3.jpg
http://img218.imageshack.us/img218/8924/img0117eb7.jpg
http://img218.imageshack.us/img218/3720/img0115pm8.jpg
http://img392.imageshack.us/img392/2609/img0116sb8.jpg
http://img218.imageshack.us/img218/5933/img0117fq4.jpg
does this help you ? is it atx?