An appropriate PSU

[MountainPro]

Hey guys so I am in sever need to upgrade my PSU and was wondering what you would suggest to be appropriate for my system. 

 

So once installed I will be running a GTX 780, Asus Maximus VI formula, i7 4770k, 2 SSD's, 1 1TB HHD, 2 140mm, 2 80mm, 1 100mm fans.  After all of that I will be water cooling the system and OC the CPU/GPU.

 

What do you guys think? 

[OmanGS]

You could get something like an AX860i, which would give you enough room to add another GPU in the future for SLI.

 

It's what I use, personally.

[Oshino Shinobu]

A good 650w should power that, but I'd go with a 750w to give yourself some headroom. If you plan on SLI, get an 850w

[Andi]

Your system will use somewhere around 400W under max load.

 

I would buy a Sea Sonic Platinum Series 660W

 

Or a Corsair AX 760W if you want the presleeved cables

[csar141]

pcpartpicker.com is a good website to use for estimating power consumption. You can select all of your parts in your current build from the different hardware lists and it will give you a power draw estimate in the top right of your hardware list. You can then use that to get an idea of what wattage PSU you need. Just make sure that you have a 50-100 wattage gap between your estimated power draw and PSU wattage rating (over clocking CPU and GPU draws more power as well as pushing your CPU/GPU/case fans to higher speeds)

[mgsstar]

What is your budget? If you don't really have a budget, the Seasonic X650 is a great choice.

[WoodenMarker]

A decent 600w would be plenty. Where are you shopping/located?

[-rascal-]

A well-made 600W - 650W unit is going to be absolutely plenty. If you have intentions to add a second GPU in SLi, look into a 750W - 850W unit.

 

Just curious...80mm and 100mm fans...? What computer case / chassis are you using?

I haven't seen 80mm fan mount on cases in a long time. I have never seen or heard of a 100mm before...