How much Wattage does my PC Specs need?

Hey I need a Power Supply that can power my pc dpecs at 100% load

Motherboard: DFI LANPARTY DK P35
Memory:G.SKILL 4GB(2x2GB)DDR2 800
CPU:Intel Core 2 Quad Q6600 Kentsfield(Going to overclock from 2.4GHZ to 3.6GHZ)
Water Cooling:GIGABYTE GH-WIU02 3D Galaxy II Liquid Cooling
Video Card:HIS Hightech H485F512P Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16
Internal Card Reader:SABRENT CRW-UINB 65-in-1 USB 2.0 Internal Card Reader w/ USB 2.0
DVD Drive:LG Black 22X DVD+R 8X DVD+RW
OS:Windows Vista Ultimate 64-bit

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More about wattage specs need
  1. 550W or 500W will do fine here. Make sure it is not some crappy generic psu, get any of the following corsair, antec, thermaltake, pc power @cooling, seasonic and enermax.
  2. recommend antec earthwatts 500
  3. My Q6600 (oc to 3.6GHz) on MSI P7N SLI Platinum (750i), 2GB DDR2800, with 2 x 8800GTS 512MB (oc), 4 SATA drives, 1 DVD-writer, Internal card reader, custom water cooled (but using AC pump) peaks at 450W when fully stressed so 500W should be adequate for your rig. BTW I'm using Thermaltake Toughpower 650W...
  4. The main thing is not the total wattage, but rather making sure you have enough +12V amperage available to run your high-power CPU and high-power video card.
  5. Overbuild with the PSU imo. Get a PC Power and Cooling 750 or Corsair 750. Those will support just about any single video card and dual or quad core processor combination you can throw at it. May as well give your self a little head room for about 50-60 bucks extra.

    I will not use less than a 750 watt PSU anymore in a gaming machine. The little bit of extra coin it costs to bump from 500-600 watts to 750 is minimal and isnt worth cutting corners over. There are 2 items in a PC build that I never skimp on, PSU and mobo. Those are the 2 most important components in your PC.
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