my last computer was a home made one that some one talked me into buying but it always had problems so i decided to buy a dell i5 inspiron desk top . The only problems its like a mini tower and i have ATI radeon hd5770 video card that has a 6 pin power inlet for power but the dell computer didn't came with one. And the power supply from the old one is too big to fit in the new tower. Any recommendations like adapters or if i have to buy a new power supply . Been trying to get through to dell but no connections .