Help Me determine the size power supply I'll need for a custom built pc?

Im in the process of building a pc and there are numerous sizes of power supplys in wattage. I want a supply big enough so i don't damage anything,but don't want to overpay on a bigger harddrive,if i dont need all the wattage. Here's the Specs for the pc: Pentium D 925 800MHz 3.0 Cpu,22 inch flat panel monitor,two 500 gig sata 3gbs,4 gigs of ddr2 800MHz Memory,Bose Companion 5 Series speaker set,his hightech h260prqt512 ddn-r ati radeon hd 512mb pci-e 16x hdcp video card,dual uv cold cathode kit,3 or 4 fans,two 16x dvd burners. All on a NVidia nForce 650i Ultra atx Motherboard. If anyone could leave any opinions on what size power supply would be needed that would be great. Thanks.|||look at the one in the link below. The various 12v rails is nice because you can dedicate one to the video card and the extra fans in the case, leaving the others for the HDD's and optical drives. The 650watt mark should leave you sufficient breathing space for a few things as well.



this is in the range of what you want, just find the power supply that you wish from the supplier of your choice.|||450 Watt Power Supply.|||Just get the biggest 0ne you can find, it will only draw what it needs, anyway, but extra power is definetly better than not enough. just because a ps is rated at a certain wattage, doesnt mean it will always draw that much, it will only use what it needs|||The last thing you want to skimp on is the power supply. Cheap power supplies mean unstable rail voltages resulting in poor preformance. Theres a reason nobody buys the 600watt 19.99 PSUs but pay 80 and up for quality Corsairs Antecs etc. You need lots of watts and a lot of amps on the +12V rails. Heres the minimum PSU i would recommend for your build. I would personally go with the 520watt version but the 450watt version is ample for your system. 54.99 delivered to your door.

http://www.buy.com/prod/corsair-vx-450w-…|||umm



when u biy a power supply



get the one with the back switch, i like those better



make sure its 115 Volts of power, usually in the US its like that|||For any decent rig these days, I'd suggest you start in the 450 watt at a minimum and go up from there. Also be sure to buy a power supply from a reputable source. Antec ( http://www.antec.com/us/pro_powerSupply.… ) is a good place to start. Many power supply vendors will offer power supplies for very cheap that boast high wattage output when they are basically junk and fail very quickly. Beware of very cheap power supplies.