how much power do i need for my pc

mister geforce · Jun 17, 2013

my pc
.gigabyte gtx 770 oc edition
.intel i5 3570k
.gigabyte ga-z77n-wifi
.8gb kingston hyperx genesis
.wd caviar black 1tb
.zalman cnps5x performa (cpu cooler)
.windows 8 64 bit oem
.fractal design node 304 mini itx case
.(psu goes here)

bloc97 · Jun 17, 2013

Assuming that you have 2 case fans and 1 DVD-ROM drive, you would probably need a good quality 380W PSU or a generic 440W one.
Note : I used the GTX 580 to calculate, since they have the same TDP.

You can see for yourself here : http://www.extreme.outervision.com/psucalculatorlite.jsp

Hope it helps!,
-Bloc97

mister geforce · Jun 17, 2013

bloc97 :

really? because my friends say i should get a 600w psu because the 770 takes one 6 pin and one 6+2 pin

bloc97 · Jun 17, 2013

mister geforce :

I wouldn't deny what they told you. It is always good to have some overhead, and generally, PSUs with 6 and 8pin connectors are good quality.
You can always buy a molex to 6/8pin converter like this one : http://www.newegg.com/Product/Product.aspx?Item=N82E16812887001&Tpk=molex%20to%206pin&IsVirtualParent=1

-Bloc97

photonboy · Jun 17, 2013

The MINIMUM I would recommend is a 550W (quality) PSU. I strongly advise a quality 650W PSU.

*The recommendation of a quality 380W PSU for the specs you gave (GTX770 etc) are completely ridiculous.

The scope of explaining why is a little complicated. I'm an electronics Technician and studies Power Supplies and have read a lot of articles on this. A quality PSU with sufficient Wattage will lost longer, be more reliable and be less noisy. FAN PROFILES tend to keep the noise level low until about 50% load.

There are MANY PSU's that have questionable quality and will cause various issues so read reviews and customer comments.

Don't skimp! Here's a couple examples that I recommend for you (shop around too):
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151106
or
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182263

Sure you could find an adequate $50 PSU. I just don't recommend it for a gamer.

jerreece · Jun 17, 2013

bloc97 :

Seriously???

nVidia states that a minimum of 42 Amps on the 12V rail is required. That's 504Watts just for the 12V Rail alone that would be required to make 42 Amps. You can risk running with a smaller power supply if you want but don't blame nVidia if something fizzles out.

jerreece · Jun 17, 2013

mister geforce :

Listen to your friends. They obviously have a better idea on what's actually required. Get a good quality Power Supply Unit that is at least 600W and has a built in 6pin & 6+2pin PCI-E power connector. Pulling too much power load through a device that is not built to handle it can ultimately result in catastrophic failure (short, fire, etc). Not to mention it may simply not allow the computer to run properly.

The Power Supply is the LAST place in your computer you want to skimp.

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how much power do i need for my pc

mister geforce

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bloc97

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mister geforce

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jerreece

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