A good 500 watt PSU would be more than enough with room for upgrade. 400 watt minimum with little upgrade path.
PSU calculator calculated 401watts for your system when it is has already been fully loaded and under 24/7 usage for more than a year. I doubt your system is gonna run under full load for more than a year without being turned off. So you don't need much more than 400 watt. http://www.extreme.outervision.com/PSUEngine
Ya I can see where your coming from. You wouldn't want a guy seeing that 500 watt PSU for 20$ and think a guy in a forum said this is what I need and get it without knowing there are other things to consider. Which prolly would of happened if nothing was said.
The specs are a bit mis-stated - but the 12V rail can provide nearly all of the amps to any one power lead - I am not sure of the terminology but the 4-15Amp rails act essentially as one. Of course you don't actually get 12Vx15Ax4 = 720W at normal loads - but these power supplies are built with very good components which could provide that much if truly needed.
Before you ask anything more - please make sure you read the PSU 101 guide - so that you can understand some of the differences between modern PSUs.
I did a lot of research on PSUs before settling on Fortron - it is one of the best brands out there. There is a list of tiered PSU manufacturers in the 101 guide - I believe that PCP&C is absolute top notch, but Fortron is solid.
Coolermaster is not built with the same high quality parts as the Fortron. Similarly, Seasonic is built with the same specs and is a fantastic brand.
Specs might be the same, but the components are much better. Additionally, most any bit of technology can 'fry in a month' or less. It's anomalous, but it can happen. Say it's a one in a billion chance - there is still always the chance.
I didnt disparage anything, I told him what most people know already. That coolermasters PSUs are not of the highest rating, and that in my experience it fried and killed my motherboard.
Also I meant that my build has the same specs as his, why would i say that I had the same coolermaster as the one he was looking at AND it had the same specs, that would be repeating myself. Read the message, understand message, then respond.
I think u can just select a quality band with the right power.
Although the overall power consumption depend on all components of your computer, I suggest u buy a PSU with no less than 500W for your 8800GTS in order to leave some margin for future upgrade (add HDD for example).
Here are some wonderful bands with complete product-line available:
AcBel, Delta, Seasonic, Zippy, Antec, FSP
Actually I was wondering about FSP, I am not happy overall with the Corsair. I went with the Modular cables so i can have better airflow but with the ribbon style cabling it just blocks the airflow even more. I can get a 700W FSP with 3 12v rails, 16A per rail, for the same price. Is it worth it or should i stsick with the corsair?