So I’ve gone ahead and ordered these

And will soon order a cooler master storm trooper chassi

But I still can’t decide what cooler and Power Supply Unit I should get.

I need to know how much watt a need for the system. I don’t want to get something that is too low or something too high and just spend extra on it for no reason.

Is 800w enough for now and maybe an extra GPU later on?

As for the cpu cooling, is it better with a water cooler or it just makes less noise with no real cooling advantage over a regular cooling fan thingy?

That is one hell of a beast
For 2 overclocked 680s you will want at least 800W Power supply, something like this
http://www.guru3d.com/article/cooler-master-silent-pro-hybrid-850-watt-psu-review/5
But the powersupply is something that you shouldn't skimp on especially on a super high end build like that. And it may be worth getting a 1000W high quality PSU just for the extra efficiency under high load.

As for CPU cooling, there a pros and cons for both air and water. Water coolers are generally more efficient but they can be harder to install and cost more. Unless you plan on doing some heavy overclocking there is no real need to go for a water system, SLIed 680s will already be very load so the noise from a decent CPU cooler won't really be an issue.

If you want a liquid cooling system and want serious overclocking then there is the H100 http://www.guru3d.com/article/corsair-h100-review/1, but personally it looks like too much of a pain, I mean that radiator is huge. Intel make a good water cooler BXRTS2011LC which is a bit more reasonable.

The Cooler Master TPC 812 seems like a more reasonable priced alternative which uses a vapour chamber design. And supports overclocks up to 4.6GHz on the 3930k which should be more than enough for anyone.

As always make sure that you read plenty of reviews and get other opinions tho. I can't say I have any experience with such high end gear myself.

Nice beast!

If you look at Anandtech (with a system similar to the one you have), a 800W PSU will be enough. And as zarx said go for a good PSU, don't try to skimp on it or you may regret it.

As for CPU cooling, it's up to you. All-in-one water cooling set-ups offer the same performance as high end air heatsinks at lower rpm, or better performace at the same rpms.

The Sandy Bridge family are hot chips, even more if you plan to overclock, so you will need a good/very good cooler. How do you feel with the idea of having water running in your case? If you are fine can deal whit it, then the H100 that zarx mentioned seems to fit in the roof of your case, but you can also get other closed WC set-ups from Corsair (H80)or Antec (Kühler H2O 920). If you don't like the idea of water, you'll have to go with a tower heatsink.

And, as zarx says, check for reviews, both from professionals and from users to know more about them (is the heatsink easy or hard to install, how long are the cables of the PSU, noise, etc).

Edit: Here are 2 sites with many cooler reviews: Frostytech, Legit Reviews.

I'm ok with having water in my system as the reviews I've read/watched say that its literately impossible for water to leak though one guy said it did. I'm guessing he did something wrong with it :P

I'm still not sure if I will overclock the CPU, I don't think I need to though, not for a while at least.

yup I won't buy a cheap PSU just to save money and risk everything els.

thankfully i still have until the end of next week to decide

thanks for the tips and links guys, very much appreciated :)

Nice rig.

For the CPU cooler I'd go with the noctua nh-d14. Its by far the best air cooler on the market and it's better than these closed loop water coolers as well. Only true water cooling is better from my experience...

As far as PSU, that's an pretty easy to buy these days. GTX680s use less power than previous flagship cards so any decent brand name PSU from 850 to 1000W should do and future proof you for any crazy overclocking or upgrades you may decide to do in the future.

Just make sure it has all the connectors you need. No one likes molex to PCIe adapters. :)

As a side note...

I've come to realize that all these insane spec'd builds are really not necessary for enjoyable PC gaming. I've been guilty in the past of buying the latest, greatest and most expensive gear and it really wasn't needed to play the games I wanted to play.

I've recently did some test and benchmarks with my old systems and here is what I've observed.

Athlon X2 7750BE + 4GB DDR2 RAM + HD7750 will run pretty much any game at 1080p and medium settings at 30+ fps. This is some seriously old and low end stuff and it's good enough to run a beast like Metro 2033 on medium and 1080p as long as you disable all AA.

Phenom II 940 (AM2+) + 6 GB of DDR2 + GTX580 will run any game at 1080p and max settings. You may need to lower AA to 4X on Witcher 2 and MEtro 2033.

Phenom II 940 (AM2+ overclocked to 3.8GHZ) + 6 GB of DDR2 + GTX580 SLI will run any game in Nvidia surround on max settings, minus AA.

These are 4 year old CPUs and slow memory combined with latest GPUs and they work just fine. I recently built a HTPC with i5 2500K, 8 GB ram and GTX 580, and I feel kind of stupid cause I could have used any two of my old AMD machines with the GTX580 to play games like Max Payne 3 or Alan wake perfectly fine.

For a moment I decided to go with that cooler so I looked up a video on youtube and it got highly prized but then I saw the date 2009 hmm.

Now the price difference isn’t much on the H100 end nh-d14 but I did a google search for best CPU coolers and found this site http://www.frostytech.com/top5heatsinks.cfm

But daium that thing is huge haha XD

@disolitude: I agree. However if you are getting a new PC it is hard not to go for the best you can get, not the one that suits you now. This way you are also putting to rest that little voice in your head that tells "your PC will be obsolete in one year".

Personally I'm quite happy with my 750 but, although I play on a 1080p monitor, I'm thinking about upgrading my HD5850 to something better, maybe an HD7870 which gives me almost twice the performance and uses roughly the same power at load but, also very important for me, less power at idle.

Well besides gaming this will mostly be for 3d work ( Maya/Mudbox and other 2d aplications). Also this will allow me to be able to work with the different passes in real time which I’ve wanted for a long time

I’ve had a week system for far to long and I can’t make models or texture them with the freedom I need plus I will be able to render scenes at a higher resolution much faster as well :)

If only we didn’t have these high taxes I Sweden though :P

Here is a 2012 review comparing it with liquid ones.

http://hothardware.com/Reviews/Noctuas-DH14-Can-Air-Cooling-Keep-Up-With-Liquid/?page=5

H100 is better it seems, but Noctua is up there with the rest. 

I prefer air cooling myself so I'd still probably go with Noctua due to near silence and top performance, but if you want the best H100 it seems is the best.