Hi i just picked up an quad core gateway computer it has an Q9300, now the power supply is only 300 watts with 14amps on the 12V rail, now the power supply seems to use a 20 pin connector to the motherboard and theres no 4 pin connector to the cpu this is the first time i have seen that i don't know is that matters or not, what video card can i use right now theres a ati hd 3450 and is this power supply normal or what