good cheap cases that support atx boards and big graphics cards

This:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119233&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

Or This:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139018&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

If your looking for really cheap than...

This:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811146075&ignorebbr=1
 
http://pcpartpicker.com/part/fractal-design-case-fdcacore2300bl

This is one of my favorite cases for a lower budget build. If you're looking to spend under $50, then consider it. If you're willing to spend a little more, then I'd recommend some of the cases the others have already mentioned. My case here only has two fans installed at first, but you can get another fan and install it. There are a few cases with three fans pre-installed at low prices if you are willing to compromise more on quality and get a Rosewill case. Not that they are bad, but they are certainly not great.