Windows 7 - Need Help Choosing a Computer case

Hello All,
I have (unfortunately) an Acer Aspire X3910 desktop computer.
I have had it 6 months and it been in for repairs three times already.
One of the main problems I'm having with it is that the case is very small.
And the inside gets very hot Acer has hat to replace the computer once
and change the hard drive twice.
I was advised that I should change the case. However I don't know the
form factor that I need to buy. The information that Acer states is that its
a "Small Form Factor" but when I try to look for it I can't find that form
factor. Could someone tell me what form factors I can use and if possible
recommend a case.
Attached are images of the case I have and other information.

Any Help Will Be Appreciated

If the case is SFF, you don't want another one of those, since that is the root cause of your overheating. Any standard ATX case will fit your motherboard. However, your current PSU might not fit, so you will need a new PSU.

Your attachments provide no useful info. Provide a link that shows the inside of the computer.

See this article here: Small form factor - Wikipedia, the free encyclopedia

And see if you can compare your motherboard to the pictures to determine the size.
Or as Comp Cmdo suggests - take a photo of the inside of the computer and we can compare it.

Thanks for the replys.
I will try to get the info and post it.

I'm not sure that's true.

http://support.acer.com/acerpanam/Ma...X3910_BOOK.pdf

The board is smaller than a normal microATX motherboard. (It only has two peripheral card slots.)

Attached is an image of the back of the Case and the motherboard.
The images provided by the link sent by bobkn are good.

It looks like a Mini-ITX board to me.

Newegg.com - Computer Hardware, Computer Cases, Computer Cases, Mini-ITX Desktop

Thanks for the reply's I will be looking into the information.

Thanks again.