The CX750's have 4 PCIe connectors but they are doubled up on only 2 sets of wiring so if you plan to max out the power draw realistically you should be careful not to burn your wires. A couple pages back there is a photo from someone who burned up the wires on their CX600 which has two connectors on one set of wires.
You're slightly wrong, cyper didn't burn up his cx600m. He was using an extender cable on his cpu power cable and the extender burned up. I'm currently using the same cx600m that has a single pcie with split ends. At default clocks, the psu is holding up well. The wire gets extremely warm but not hot. I don't understand how people read one thing and get it all switched around and post something different. It's like that gossip game kids play where you whisper something in someone's ear and pass it down. So much wrong info by the end of it.