If you play the wait game you're always waiting. Two 480s is still a very powerful set-up and with 3d I would imagine you need twice the power, since it's really having to display twice the information. I say buy a second 480 and if you think its not enough when the 600 series comes out sell the 480s and get the 600s.

PSU's I'll admit I still know nothing about but, I do know corsair is a awesome brand and stands behind their products. Yea 1200 watts would sure last you a while.

dyno0919

Just remember that you shouldn't try to future proof your PSU too much. While I will firmly stand behind Corsair for their excellent PSUs and lifetime, every PSU will degrade over time. What with capacitor aging and increasing power requirements, I wouldn't go that big unless you plan on actually using the power in the future; don't be "hopeful" of using that much power. Corsair generally makes PSUs that initially put out a LOT more than is claimed on the box and can last a really long time even with capacitor aging, but it's ultimately your call. The PSU is one of the most important parts of your build and my rule is that I never expect it to last more than 4 years. 

Again, your call. This is all the biased opinion of a conservative, however, so take my opinion with a grain of salt if you have a lot of spare cash floating around. 

 
Spare cash I do not have. Well I was also look at the Corsair AX 850w. Do you think I could run the setup I have now with another 480.
Refer to my signature for my specs. I also have 7 fans. I'm probably gonna get a couple more. Right now I have the arctic cooling accelero xtreme plus on my one 480 and if I get another 480 I want to buy the cooler for that one too. Since they take up 3 expansion slots I'd have to relocate my psu to the top of my case. Most likely I would buy 2 more fans.

i hear some people running 2 480's with a 750w corsair I have, with overclocks. I don't want to take that chance though.

dyno0919

I hear about a lot of people running on 850w and even a few on 750w. If I were you I would just buy another 480 and see if it will start. If you are worried though, I would definitely go with a 950w just to be sure. It sounds like you have a lot running in there.

 
Yeah I do, I have 3 200mm fans, 3 120m fans, and 1 140mm. Plus the overclocked CPU, RAM, and GPU. But I wouldn't run the GPU overclock with 2 480's. I guess I could try buying the 480 see if my PSU can handle it while running oc scanner or some type of stressing program.
 
Quick question though. Is there anyway I could damage my hardware if my PSU can't handle it?

dyno0919

How old is your 750?
In short, yes. The answer is always yes. The PSU can overload and take everything down with it. That chance is extremely small with a non-aged Corsair PSU though lol.

 
Yeah I bought it may 17th, 2009

You can also try the Silverstone 1000's :) they might be cheaper and just as good

Once upon a time I had a 250W PSU (Shuttle XPC system). I thought this would be good enough, but when I bought an ATi X800XT (400 bucks!), I had to upgrade to a 360W unit.
 
A few years later, I bought my first video card which actually required me to plug it into the MB and PSU (OMG)! So I bought a 600W unit figuring this would last FOREVER. That burned out, so I bought a quality 650W unit, thinking I'd be set.
 
Two years after that, I find out this this wasnt enough to run my PC as well as a SLi 285s... so I bought a Corsair HX850. That lasted about 10 months, until I upgraded to an i7 added a second 480.
 
I now am the proud owner of a 1200W PSU.
 
True story. Think about that.

Like I said, it's your money and your decision. Try making out a pros and cons sheet. Depending on how stripped you are for cash, give money (in the cons section) a multiplier because we all know how important money is, even if we don't want it to be.
 
As many on here have said, there is absolutely no reason to get more than 1000w. Like I have said, don't buy too much hoping that you might use it. Like others have said, Corsair makes amazing PSUs. If you don't mind shelling out the money and understand that you may never even use 1200w, then by all means go for it. Corsair also makes a 1000w PSU, something to think about.
 
What these threads always come down to is $$$ and how much you have. 1200w is a lot of power, and most 850W PSUs will run SLI 480s. Like another user said, you will be running it for its life though. I say, compromise. Buy Corsair's 950W and have extra cash. You could even put that extra dough away and add $5 to it every month just in case you need a bigger PSU. Either way, if you plan on adamantly keeping up with technology, you may very well need 1200W within the next 2 years (nobody knows exactly though, we are on our way to lowering power requirements, something else to think about). That 950W should still be running fine after 2 years and you can always sell it, put that and the extra $120 that you would have accumulated by putting away $5 together, and get a new one.
 
Again, to place emphasis on the term, it's all about the money. If you don't want to see a lot of it go, then I would never in a million years recommend you to spending all of that money on a 1200W PSU.

The ones that are pre-attached are usually necessary, like the 24-pin for the mobo and such.

That shouldn't be a deciding factor anyways. It pains me a lot when people care so much more about how their computer looks than how it performs, or paying a premium for it to look good and perform better. Meh, like I said I'm super conservative.

Well I don't even think they (Corsair) make PSUs that big that aren't modular. There's no problem in wire management, there're just a lot of people that I know and see who will pay $50+ more just to show off to their friends how clean their case looks. 

You could always buy one of those mini PSUs just for graphics cards too.

A Corsair TX950 would be minimum for a PSU to support GTX 480's in SLI.