I have an MSI Z-97 G-45, Zotac Gtx 770 and an I7 4770k put together, with an Ace 700 watts PSU. The PSU ha only 4 pin male cable(12v), but on the mobo there is an 8 pin female connector. Is it fine to use a 4to8 converter or am I better off with a new PSU? What makes the one different to the other?