Optiplex GX520 desktop and sff compatibility

I was looking for the last few days, search the whole internet but did not find answer for my question. So thats why I'm here now.

Problem starts with my GX520, mothreboard is dead, so i need to replace it. Not a big deal but the bord in my pc is not the same shown on dell site, there are 4 mem slots, agp slot  and one pci slot, Never find this form, some one says its gx620, but the service tag is for 520 <ADMIN NOTE: Service tag removed per privacy policy>

Ok, dont need to be the same motherboard, it's no matter to me, so the question is:

Can I use any motherbord from GX520, GX520ssf, GX620 for replace? Is the front panel connector cable same? Is the other cables are same?

If some one have any drawing's, dimensions, other info about this, pls reply.

Thanks!


(and sorry for my english)