Hello, so basically I have an EVGA GTX 660 GPU which requires a 6 pin connection, now understanding this I have a 500W PSU, but with no 6 pin cable, but then I do have an adapter which is a dual molex to 6 pin, however I only have one molex cable and I have inserted it into the adapter and powered the PC on, and it was successful, will this kill my PC soon or no?