Hey, so i have a question. My case is the Zalman Z9 U3 and the advertisement for it says i can place the PSU on the bottom and it has grill son the bottom for air. My PSU's (EVGA 500W 80+) manual said if the case has air ventilation on the bottom to put the PSU with the fan facing down. So I don't know if i can do it with the Z9 U3 and I'm really confused about that. Help me please