Hi. I am planning to build this PC: Core i7 920 Gigabyte eX58 UD4P Sapphire HD4890 Toxic OCZ 6GB(3X2GB) 1600MHZ CL8 WD 1TB 32MB SATA II Cavalier Black Asus Vento Chassis Thermaltake 500W PSU 2xDvD Writer bla bla bla
Yeah like anti said, have fun with a 500 watt. Also have fun with your cpu and gpu running at 65* idle. Get a Corsair 750.