The answer is not as staight forward as that....
The best thing you can do is open up and look.....
It is true. As long as the form factor is the same then it should fit.
Most new tower cases come with the option to fit the mobo mounts as you need them. i.e. you can fit the mounts to suit AT or baby ATX etc.
However,
some desktops use "small form factor" mobos which are OEM and unique to the make of the computer like Dell or compaq. In this case you will have a bit of work to do as they are built slightly different.
I will give you an example:
The Compaq Evo desktops use small form factor mobo. The PCI slots sit not on the mobo but on a 'riser card'. this will not do for a tower as the whole configuration of where different part are, is not compatable to the tower way of things. Have a look here -
http://h200007.www2.hp.com/bc/docs/s...03_rev3_us.pdf
You will need adobe reader but it will give you an idea of what I am talking about. Also the back pannel looks and fits differently than with the tower.
Like I said the best thing to do is to open up and see. Another way to find out without opening is running AIDA32
http://www.webattack.com/get/aida32.shtml
This tool will probably be able to tell you all the info you want (and dont want) hopefully including the form factor of your PC.
Try and google for the make and model of your current PC to see if you can fish out the info.
Good luck and keep it cool.....
