I recently purchaed a gigabyte MA790X-UD4P motherboard and found out the PCI-E power adapter won't work with my case, a Rosewill TU-155 II 500. The case is a 6 pin PCI-E power adapter and the motherboard is an 8 pin PCI-E adapter. I bought a 6 to 8 pin adapter, but the connectors are keyed differently so I can't use it and decided to get a new case.
Any recommendations for a general use case? I'm looking to spend about $100.
Thanks.