I am sorry I am very confused with what you mean by 12 pin connectors. There is a total of 6 6-pin PCI-E connectors on the motherboard, so any PSU with about 1200W or 1250W and 6 PCI-e connectors would work. Some of them come with 8-pin PCI-E connectors but that can be solved easily by grabbing an adapter. Make sure that the one you choose has all power available on 12V rails. As for examples: Thermaltake, Corsair, Cooler Master, EVGA, BFG, etc.
Note that new units are quite costly. I personally grabbed a used PSU from eBay. There is always a risk to get a defective unit (both new and used) but you will now quickly