How much Power Supply will be required?

Hello, I have decided the following configuration of my computer system and require the second opinion for the Power supply and in my Area I also suffer from the usual power failure.
so,I request you to suggest the power supply required for it.

AMD Athlon 64 X2 4200 - socket am2
Gigabyte GA-M61PME-S2
Hitachi Deskstar 7K160 - 160GB SATA II
LG GH20NS15
Nvidia Geforce 6100 (integrated)
Asus VW193S
1GB 800MHz DDR2 Non-ECC DIMM CL6 + 2GB 800MHz DDR2 Non-ECC CL6 DIMM
the box that I wanted to take the Mad Black Nightfever X-550W
SAMSUNG PLEOMAX - PKB-7000X

Regards.

All depends on the food, but 300W with enough food for not too bad quality!

300 watts may effectively enough (good) configuration should consume in large 150-200 watts maximum full load.

I watch a little on the net and I ask for this configuration:

Motherboard ASUS P5ND2-SLI
Kington 2GB 667MHz DDR2 Non-ECC CL5 DIMM (Kit of 2 Memory)
Intel Pentium IV 2.8 GHz Socket 775
Nvidia GeForce 8800 GTX
Sound card (integrated) Realtek ALC850
X-box Nightfever Mad Black 550W

that he lacks? is it good for games? or find and buy the damn motherboard? and costs Does expensive?

Uh not. Pentium 4 with an 8800GTX is not helpful at all. At least a Core 2 Duo or Athlon X2.