How would i fit more than 3 case fans in a pc with only 2 slots on the mobo

Solution
Get fans that will connect to the PSU molex connectors, the "4 flat", white connector(same connection older HDD and CDROM's used). There are fans that have 2 connections for power, the larger is the molex connector. Fans don't have to connect to the motherboard.
Get fans that will connect to the PSU molex connectors, the "4 flat", white connector(same connection older HDD and CDROM's used). There are fans that have 2 connections for power, the larger is the molex connector. Fans don't have to connect to the motherboard.
 
Solution