well i'm getting a dell optiplex 990 small form factor but i want toput that mother board. but i can only get a atx case so how do i put the dell mother board in a atx case
You better to check out your PC. If your PC is the 1st one you may move the MB into the new case, because the I/O shield back panel can be removed. Also check the MB to see it is the ATX format or BTX format, I think it maybe the ATX format, just double check. The BTX format MB will look like this: http://www.hardwaresecrets.com/wp-content/uploads/25_011.jpg
Next you will need to check out the front panel connectors too, the PSU connection too. Take the pictures for all the connections, so that you have those pictures...
You better to check out your PC. If your PC is the 1st one you may move the MB into the new case, because the I/O shield back panel can be removed. Also check the MB to see it is the ATX format or BTX format, I think it maybe the ATX format, just double check. The BTX format MB will look like this: http://www.hardwaresecrets.com/wp-content/uploads/25_011.jpg
Next you will need to check out the front panel connectors too, the PSU connection too. Take the pictures for all the connections, so that you have those pictures for reference later when you install the MB into the new case.
One more thing, you may go to Dell forum to see there is any similar case changing in the dell forum or not, if they had that will help.
Find more info online, before you buy the new case.