GTX 670 FTW: PSU choice.

Nvidia reccomends 450 watts / 24 amps and dual pcie connectors Oops, that's for 660Ti, sorry, it doesn't change my last statement

Single rail are easy to read, what's it say under the 12v output ?

Multi-rail is a little different
This label is just an example, and is an exception to the rule that rails are not additive

2 x 17a, below the chart we see that the 12v rails are capable of providing 408w
408w/12v=34a

And a different way of showing it, follows the rule of the rails not being additive

2 x 20a that combine for 384 watts
384w/12v=32a

Understand how to read the amount of Amps now ?

Won't make reccomendations without knowing the rest of your specs but there are several 450 watt units out there that are of high enough quality to run most basic single card systems and will cost you $100 or less

Well if you think you might ever go with a second 670 later down the road get a 750w nVidia itself recommend 500W for a single 670. Add 170W for SLI & recommended is 670W.
http://www.nvidia.in/object/geforce-gtx-670-in.html#pdp...


For testing conducted for SLI 670, the resulting system consumption for SLI is 433W of which 293W are attributed to the gpu cards.
http://www.guru3d.com/article/geforce-gtx-670-2-and-3wa...


All points out to 750W being more than enough for x2 670 in sli .Keep in mind It's not the power supply's wattage that determines whether the graphics card and system will receive sufficient power. The only power supply specification that really matters is the combined +12 Volt continuous current rating. If you don't meet this specification requirement your system isn't going to work properly no matter how high of a Wattage the power supply claims to have.

Read that a few times, but it isn't helping me understand much...

I don't know what parts are important for PSU info, but I have i5-3570k/Asus P8z77-V Pro.

Most PSU feedback always has people complaining of dead PSUs in less than a year. A couple even complain of fried motherboards, so I don't know their story. I'm simply paranoid of selecting a PSU.

Here then any of these would be best for your set up and possible future upgrades Take your pick these are all solid PSU some are over 150 but not all hope this helps

PSU:SILVERSTONE ST75F-P 750W ATX 12V v2.3 / EPS 12V 80 PLUS SILVER Certified Full Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


PSU:SeaSonic X750 Gold 750W ATX12V V2.3/EPS 12V V2.91 SLI Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU:Rosewill CAPSTONE Series CAPSTONE-750-M 750W ATX12V v2.31 & EPS12V v2.92 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU:CORSAIR HX Series HX750 (CMPSU-750HX) 750W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


PSU:XFX PRO750W XXX Edition Semi-Modular 80Plus Silver 750 Watt Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU PC Power and Cooling Silencer Mk II 750W High Performance 80PLUS Silver SLI CrossFire ready Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU:XFX P1-750X-XXB9 750W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Why do PSUs have so much feedback about them dying in just a couple months? The Corsair model has the best feedback.

Those are not to be taken as reliable or any sort of proof i will give you a example i have a friend who likes amd very much he told me one night when we were hanging out drinking that he goes on newegg and tigerdirect as well as other sites and writes made up bad reviews about intel and nvidia in the hopes that it will sway people not to buy their products i was like wtf that's bs don't do that then he said he was kidding but i think he must or why would you even joke like that also Your best bet is to always do your own research using the many reliable professional review websites and don't always believe everything reported by random anonymous posters on a site that sells products. Just check these sites for real proof and facts about psu because they test them and show proof not just make blanket statements you can visit SilentPCReview, http://www.silentpcreview.com/section10.html PCPer, http://www.pcper.com/ AnandTech, http://www.anandtech.com/casecoolingpsus/ HardwareSecrets, http://www.hardwaresecrets.com/page/power HardOCP, http://www.hardocp.com/reviews.html?cat=NDUsUG93ZXIgU3V... and jonnyGURU http://www.jonnyguru.com/ for in-depth psu reviews. Here is a handy chart of power supply reviews available: http://www.overclock.net/power-supplies/738097-psu-revi...

If you'd like to know who manufactures a certain power supply, here are some charts and instructions that you can use to look it up:
http://www.jonnyguru.com/modules.php?name=NDArticles&op...
http://www.realhardtechx.com/index_archivos/Page541.htm

So I should be fairly satisfied with the Corsair HX750? Do I need an adapter if I plan on using a fan controller?

You will be very satisfied