I need advice on my motherboard and graphics card. For the motherboard the PCI x16 slot is on the bottom and will be right above the power supply so I'm afraid that if I put my card in it it will cause heating issues. I wanted to know if there is any differents between me putting the card into the x8 vs the x16 slot. And if someone could explain the main differences between the x16, x8, and x4 slots that would be very helpful. Thanks