Originally Posted by Yo-Yo

After deciding that a PCI graphis card would not do the job, and my onboard graphics wont display some objects like water in some games. I think I may need to upgrade my motherboard

How can I tell If a motherboard will fit properly into a case, do all ATX motherboards fit into all ATX cases? I've got a pavillion a1100y It looks like all of the ones I've found will fit but just making sure

However, I would like some suggestions
It needs to be able to hold a Celeron D and have a PCI express and AGP and at least 2 pci slots and onboard audio and preferably use DDR SDRAM so i can use my "old" ram. I sure sound picky.