Will a ATA hard drive fit in an atx case?

i have a dell 4300, i dont want to by os for new board, but want to put mobo in an atx case with new power supply and cooling to compensate for new card and ram heat. so would mobo fit in this? 10-Bay BIO II 20+4 Pin ATX Window Case w/450-Watt PS (Red)Will a ATA hard drive fit in an atx case?
if you move everything from the dell case to the new case it will all work. but aslong as your not changing the motherboard you wont need to buy a new version of windows, btw most harddrives are universal anymore they will fix in any caseWill a ATA hard drive fit in an atx case?
it standard dear 3.5inch fit on all atx case
It will. ATA is the data transfer method, while ATX is the standard form factor. With your hard drive, you'd be more worried about the size, which is most likely 3.5'; (that will fit in almost any case).