I need a 400-450ish watt PSU. I currently have an HP PS-5301-02 300W PSU, and I want to make sure the replacement has all the necessary cables/connectors. Motherboard is MSI-7778. Also needs to fit in the case (my case doesn't have a model number it's a Pavilion p7-1534). I don't want to put a lot of money into this because it is an FM2. Can someone list the connectors I need to look for? I don't really know what I'm looking at, I'd really appreciate it.