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Power Supply - What do i need?

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April 10, 2012 11:22:17 AM

Hi, i'm building a new PC and want your advice over PSU's

Specs will be:
Intel Core i7 3770k (when it releases)
Asus Sabertooth z77 (when it releases)
Corsair cooling Hydro H100
16 GB 2133 Mhz DDR3 G-Skill
2x EVGA GTX 680 Superclocked (or perhaps Hybrid cooled version when it comes out in time)
Considering RevoDrive3 120GB (if it has TRIM, not sure yet)

PSU: ??

How much Power do i need, and what PSU will be good (I really want full cable management)
I'm from holland, buy my stuff at www.alternate.nl which uses €

More about : power supply

a b ) Power supply
April 10, 2012 1:17:07 PM

get a psu that is rated at 800watts or higher
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April 10, 2012 1:45:39 PM

But i've read somewhere that GTX 680 could reach 350Watt, makes 2 of them 700Watt.. if im right?
I guess if i want to Overclock CPU I need some extra, and other components also need power? how would 800 be enough?
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a b ) Power supply
April 10, 2012 1:50:58 PM

Either of these would be good for you:
Antec High Current Gamer HCG-900 (Retail, 4x PCIe)
http://www.alternate.nl/html/product/Voedingen/Antec/Hi...

or

Corsair CMPSU-850AX (Retail, 4x PCIe, Full Kabel-Management, Zwart)
http://www.alternate.nl/html/product/Voedingen/Corsair/...

or

Seasonic M12II-850 Bronze (Retail, 4x PCIe, Zwart)
http://www.alternate.nl/html/product/Voedingen/Seasonic...

Remember, you have to judge a power supply by what it can deliver in amps at the 12V rail, not by total wattage. Any of the three above will be sufficient for the power saving 680. It doesn't eat as much power as you'd think.
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Anonymous
a b ) Power supply
April 10, 2012 2:00:01 PM

the MAX a 680 will hit is 225 watts!
6 pin power is 75 watts*2 + 75 watts from pci-e slot (3*75) 225*2(sli)=450 watts on the 12 volt rail along with 95 watts for cpu and few 10 watts for HD and optical drives . . .

your ok with a 750 with a 46+ amp 12 volt rail.:) 
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a c 1167 ) Power supply
April 10, 2012 6:41:50 PM

For a system using a single GeForce GTX 680 graphics card NVIDIA specifies a minimum of a 550 Watt or greater power supply that has a combined +12 Volt continuous current rating of 38 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

For a system using two GeForce GTX 680 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater power supply that has a combined +12 Volt continuous current rating of 53 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

For a system using three GeForce GTX 680 graphics cards in 3-way SLI mode NVIDIA specifies a minimum of a 900 Watt or greater power supply that has a combined +12 Volt continuous current rating of 69 Amps or greater and that has at least six 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock you are trying to achieve.

I would choose an 850W PSU with a +12 Volt continuous current rating of 70 Amps. This should handle any overclocking and extra devices that you may add to the system now or in the future.
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April 10, 2012 8:10:28 PM

Ok, my brain stops at total Watt.. +12V or 38 Amps?? I have no idea how i have to look at that..
Soo.
I'm buyin my PSU from Alternate
I want it good cooled, and silent. And be futureproof for SLI or CFX in future (so i don't have to buy new PSU when I want to get 1 or 2 new GPU's)
My budget is ~€250
At first i had this on mind:
http://www.alternate.nl/html/product/Voedingen/XFX/1250...
But i only picked it because it should have good cooling and it says it should be silent :p  and i liked the 1050W.. But how do u think about it, or an alternative for such price, which would be future proof
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Anonymous
a b ) Power supply
April 10, 2012 8:24:43 PM

^ that is a most excellent choice if that is what you want.

btw, volts*amps=watts.
12volts*38amps=456 watts. thats a pretty crazy spec nvidia puts out :( 
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Best solution

a c 1167 ) Power supply
April 10, 2012 8:33:41 PM

For a system using two GeForce GTX 680 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater power supply that has a combined +12 Volt continuous current rating of 53 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

The Corsair Professional Series HX850W (CMPSU-850HX) for €157,90, with its combined +12 Volt continuous current rating of 70 Amps and with six (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 680 in 2-way SLI mode.

http://www.alternate.nl/html/product/Voedingen/Corsair/...


The Seasonic X-Series 850W (SS-850KM) for €219,90, with its combined +12 Volt continuous current rating of 70 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 680 in 2-way SLI mode.

http://www.alternate.nl/html/product/Voedingen/Seasonic...


The XFX ProSeries 850W XXX Edition Semi-Modular (Silver) (P1-850B-NLG9) for €122,90, with its combined +12 Volt continuous current rating of 70 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 680 in 2-way SLI mode.

http://www.alternate.nl/html/product/Voedingen/XFX/850W...
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a c 144 ) Power supply
April 10, 2012 8:41:52 PM

By the way, if you are going to use 2 video cards, you will not have many unused cables. Modular is not really that important.

OTOH, the XFX PSU that ko888 linked to is a very good choice: a modern, built by Seasonic design.
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April 11, 2012 6:40:34 AM

The reason that i want it modular, is because i really don't want a bunch of unused SATA Cables hanging randomly in my case..
And if i take 850W will i be able to build in any SLI or CFX in the future (as long as it will be only 2-way) Because i don't like buying new PSU when i replace my GPU's in a few years
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a c 110 ) Power supply
April 11, 2012 6:43:55 AM

Go with any of the ones that Ko suggested. There is no reason at least, unless you get a crap case that doens't use up all of your molex's and has plenty of room for hiding cables in the back :) 
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April 11, 2012 7:35:19 AM

I'm taking the Zalman Z11 Plus as case.. and i use 2 SSD's and 1 HDD .. no CD/DVD drive.
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April 18, 2012 6:55:51 AM

Best answer selected by kemperkipie.
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