P6N SLI / power supply question

I have a question to pose to the experts. I am building a computer for a friend. He brought me the parts to work on. The motherboard is the MSI P6N SLI and the power supply he brought me is a KWi KingWin Model AP-450 with the following specs:
+3.3V - 22A
+5V - 35A
+12V - 15A
-12V - .8A
-5V - .5A
+5VSB - 3A
Total - 450W
The system will contain 2 hard drives, one Seagate Barracuda 7200rpm 80GB SATA the other a Seagate Barracuda 7200rpm 40GB IDE.
It will also have a SATA DVD burner and a XFX GeForce 8600 video card which does not have a power input.
CPU is an Intel 925 dual core chip.
In your opinion, will the 450W power supply be good enough to keep this system stable?

Total watts is pretty useless these days. It is more important that each rail has current reserve beyond what is attached to that rail. A poster in another thread had a 1000W power supply with 4 rails that he spent nearly $300 on. Each individual rail was spec-ed lower than the minimum for the motherboard almost all the excess power was on the drive connectors not the motherboard connectors and the 4 +12V rails were not helping the motherboard since only 1 rail was supplying the +12V to the motherboard. So in this instance a 500W supply that only has 1 rail that is 25A on the +12V is more powerful than the 1000W supply. In this case, the 500W power supply would be fine for powering up the motherboard alone, that particular 1000W supply would not.
Lesson here:
You can't just throw Watts at your system without determining where those Watts are going.
It only takes 1 leg of your power supply to be too weak, for the existing setup, to make things act weird. Doesn't matter how much reserve power you have on the other legs. 1A too weak and any chip can power down in the middle of things doesn't matter if you have a 2000W supply that cost $1000.
The components in your computer do not care about how cool your power supply looks. They don't care if it has LED fans or UV connectors or braided sleeves. It doesn't matter how much it costs. Once you find a list of power supplies that will work for your system, then look for adequate cooling, enough of the right connectors, etc. The 2nd to the last in the decision process should be glossy paint and lastly the price. Of course you may want to purchase that clear case power supply with 3 color LED 120mm fan. It may just be a conversation piece sitting on the shelf if it won't work in your system.
Good examples:
The first one may in-fact be the best one for a particular motherboard. The last one may not even power up a basic quad core system business workstation. You must research what you are buying. Don't just look at how cool it is.
This one has 25A on the single +12V rail. 550W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817170011
This one has 16A on the +12V1 and 18A on the +12V2 rails. 500W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817148003
This one has 7 +12V rails, several of them at only 20A. 2000W has 2 power cords and I want to know what case it fits in. I see feet on it and they are calling it a modular supply. There are other ways of doing things. Not everything has to be forced into one system.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817101033

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