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How many watts do I really need?

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  • Gaming
  • Power Supplies
  • watts
  • Power
  • Components
Last response: in Components
April 12, 2013 7:10:18 PM

I am about to be building my first gaming PC and am trying to figure out how much power I really need. the specs are going to be

GPU: EVGA SuperClocked GeForce GTX 660 2GB
CPU: AMD Phenom II be 965 x4 (I plan to eventually overclock to 4.0ghz)
CPU Cooler: Stock cooler at first, but plan to put in a Coolermaster V8
RAM: G.SKILL Ripjaws 8GB @1600MHz
Optical Drive: 1 DVD burner
Motherboard: ASUS M5A97 R2.0
Harddrive: WD Blue 500GB 7200RPM (may add another one later)
Case Fans: 2x 120mm and 1x 200mm LED fan

I was originally going to go with a 520 watt PSU, but I am worried that may not be enough with the overclock and upgrades I plan to do in the future. How many watts will this system use under load?


More about : watts

April 12, 2013 7:19:05 PM

I threw your components into a power calculator and I hit 457w. I would recommend at least a 600w power supply. However if you plan to put a better graphics card or a second card in I would think about something better.
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April 12, 2013 7:19:50 PM

Anything >500W (from a QUALITY PSU) will be fine for this system. I have a i5 760 @ 3.4GHz and HD7950 @1 GHz, 3 HDDs and a CD-ROM and I can't get it draw more than 280W at the wall with EVERYTHING going at 100%. In my experience, systems draw a lot less power than their max TDPs suggest.
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April 12, 2013 7:26:30 PM

nitrium said:
Anything >500W (from a QUALITY PSU) will be fine for this system.


He's cutting it close if he overclocks, adds another HDD or has a bunch not externally unpowered USB devices.
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April 12, 2013 7:26:59 PM

Ok, Im looking at the SeaSonic S12II, (which I have heard is good) it comes in a 520 watt version and a 620 watt. The difference is only $5 so I'll probably go with the 620 just to be safe for future upgrades.
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April 12, 2013 7:31:31 PM

jemm said:
As you have plans for the future, plus overclock, then go with a 750W PSU like Antec High Current Gamer Series HCG-750 750W http://www.newegg.com/Product/Product.aspx?Item=N82E168...



I would like the extra headroom, the only problem is the price pushes me a little too far past my budget. Are there any other quality 750 watters that cost about $70?
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April 12, 2013 7:32:55 PM

The 620 W SeaSonic looks good 76% 5 "egg" on newegg. As jemm said, depending on amount of OC'ing you do and what you add, keep a more powerful one in mind.
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April 12, 2013 7:36:16 PM

mjmacka said:
The 620 W SeaSonic looks good 76% 5 "egg" on newegg. As jemm said, depending on amount of OC'ing you do and what you add, keep a more powerful one in mind.


would the 620 watt be fine with only the CPU overclocked at 4.0ghz?
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Best solution

a b ) Power supply
April 12, 2013 7:36:17 PM

If you´re sure you won´t go SLI, then the SeaSonic S12II 620 Bronze 620W you´ve listed will be just perfect! :) 
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April 12, 2013 7:41:10 PM

jemm said:
If you´re sure you won´t go SLI, then the SeaSonic S12II 620 Bronze 620W you´ve listed will be just perfect! :) 


Ok good, because I really don't plan to do SLI
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a b ) Power supply
April 12, 2013 7:44:56 PM

Cool!
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