Corsair CP-9020050-WW VS550 550W Desktop Power Supply

I've now bought three of these power supplies and had no issues with them yet.

Using them with the following gaming hardwares:

i5 4690K + GTX 960
i3 4170 + Mini R9 280

Everything runs perfectly, cable lengths are good.

If I had to make a complaint, it would be that the fan is too small/slow to act as a good exhaust for hot air out of the PC. I'm unable to feel any meaningful airflow out the back of these units.

PCIe 6+2 connectors. Only one of the connectors has a +2 that wires back to the unit - the other +2 connector piggybacks onto the first. The wire gauge is suitable for this but I personally don't like it. I'd reccomend using a graphics card which uses either 6+6 or only a single 8 pin connector, nothing more.