Let's just say, hypothetically, I got a Core2Duo 6600, 4GB RAM, 512MB 7950GT, whatever HD's and a 64 bit copy of XP, this would be quite quick, yes ?
Though you won't need anything over 400 Watt (if it's some quality off course, cheapass psu's of 500 watt aren't to be trusted) if you don't plan heavy overclocking, SLI or 10 hard disks in your system. A good PSU is important but don't overspend on it since it will be useless anyway.
Yeah the separate power rails can be something to look after indeed. But I see lots of people hearing "a good psu is important!" and spending 130 euro on some top-of-the-bill 550 watt monster with hardware that tops 200 watt or less.
I tried to get a really good PSU, http://www.hardwaresecrets.com/article/402 was available and after reading some reviews it seems it was a good choice, they put some real thought into it.Yeah the separate power rails can be something to look after indeed. But I see lots of people hearing "a good psu is important!" and spending 130 euro on some top-of-the-bill 550 watt monster with hardware that tops 200 watt or less.
http://extreme.outervision.com/PSUEngine
Could be interesting, gives you an idea how much power it would slurp through your wall socket.