Help,need a motherboard

[Battousai]

I'm trying to find a motherboard to fit my old school alienware tower I've had for like 4 years. Bought the tower, but never bought any parts. So now I'm going to buy parts but I dont have a clue what will fit my tower. So if anyone can point me in the right direction I would really appreciate it. Thanks for any help I get.
^ ^x

P.s. Here is a pic I found of what my tower basically looks like, just to give an idea.
http://i3.ebayimg.com/01/i/08/3f/4d/9b_2.JPG

[Daniel]

It may be proprietary... You could try an ATX.

[curtisjade1]

It should be atx i replaced a motherboard in an 2 year old alienware case and it was atx so it should be atx the screw holes were different so i could only get 4 screws in it but it worked

[computerman]

ATX no doubt about it. if you wanna double check measure it, as long as its bigger than 12x9 its ATX. other wise your dealing with MINI ATX or MICRO ATX