Im sorry if im in the wrong board but im getting a new graphics card that requires a 400W power supply. I only have a 300W and need to upgrade. I dont know if this helps but- Gateway GM5472 AMD 64 X2 5000+ 2048 MB DDR2 500GB SATA II Im planning on getting a 500W PSU. Is there anything special i need to know before i buy this PSU? Thank you in advanced.