Ok so I built my first PC containing of these parts:
-Antec Solo Black/Silver Steel ATX Mid Tower Computer Case
-ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard
-eVGA Nvidia 8800GS
-CORSAIR CMPSU-550VX 550W ATX12V V2.2 Power Supply
-Intel Core 2 Quad Q9450
-G.SKILL 4GB (2 x 2GB)...