Originally Posted by Zangetsu
Well i still dont understand about the PSU thing
At first i choice AX850W , then peoples said is unecessary why is that?Because i'll not use all of those wats or about money or waste of power energy?
Sorry im new about those things.
Unfortunately, a PSU like the AX750/850 for this system is both a waste of money and a waste of power capacity. It's a little bit like taking a large grocery bag with you to the grocery store when all you're only going to grab a couple of things. Well, sort of. Even a nice 650W power supply is overkill (please don't look at my sig rig. hehehehe)
The reason why I have the HX650 is because I ran into an amazing
deal that would have been stupid of me to pass up. With the system I had at the time, I wanted the HX450 (which is no longer available), but the HX650 was much cheaper than the HX450 at the time due to this insane deal.
If I would have purchased a brand new PSU for this system, then I probably would have gone with something like the 550W Antec TruePower New. It's a very high quality PSU for a low price. At least it is here in the states.
NVIDIA recommends a 600W power supply to power a system that has one GTX 580 in it, but that's concerning 600W peak-rated power supplies. Any quality 550W power supply that I would recommend is a continuous-rated unit (which means it's rated to continuously deliver 550W) which also means that it has a larger capacity than any 600W peak-rated unit.
However if you wanted to SLI the 580s, then I would go with the AX750 for sure. It would be right in the sweet spot for that.