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How many watts do i need for this build?

  • Overclocking
  • Processors
  • Intel i7
  • Quad Core
  • Components
  • Build
  • Power Supplies
  • Power Consumption
  • Intel
Last response: in Components
February 17, 2014 2:38:29 PM

Intel Core i7-4770K 3.5GHz Quad-Core Processor
NZXT Kraken X60 98.3 CFM Liquid CPU Cooler
ASRock Z87 Extreme4 ATX LGA1150 Motherboard
G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory
Kingston SSDNow V300 Series 120GB 2.5" Solid State Disk
Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
EVGA GeForce GTX 780 Ti 3GB Video Card
NZXT Phantom (White) ATX Full Tower Case
Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer
Asus VG248QE 144Hz 24.0" Monitor
Razer Anansi Wired Gaming Keyboard
Razer Razer Naga 2014 Wired Laser Mouse
Logitech G430 7.1 Channel Headset (PCPARTPICKER LINK)
I plan on overclocking the card to atleast 1400 mhz and I plan on overclocking the CPU to 4.5ghz so keep in mind that the watts will be turned up extremely on the CPU and the GPU. Anyways i would like to pick out a decent power supply for the build. im wondering what the safe amount of wattage would be for this overclocked build

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a c 5953 ) Power supply
a c 911 K Overclocking
a c 386 å Intel
February 17, 2014 2:42:58 PM

a c 120 ) Power supply
a b å Intel
a b K Overclocking
February 17, 2014 2:45:22 PM

Would all do you fine. That combination won't pull over 400 watts, and these all have plenty of amps on the +12v rail for everything you're looking at.

Keep in mind these are for your current setup, if you're going to be looking to SLI later, get an 850w PSU of any of these brands.
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February 17, 2014 2:47:31 PM

Hello dtaylor. Based on your PC part picker estimate you will need just under 500. However you are correct that overclocking will increase the wattage quite a bit. Since power supplies are not terribly expensive, you should be safe with a 750 watt power supply. I was in a similar situation and it appears the only time Ive had problems is when my overclock wasn't stable. In conclusion, 750 watts would cover your overclocking and even some expansion to your system. You cant go wrong with extra power. Get a nice set from corsair.
February 17, 2014 2:48:33 PM

SR-71 Blackbird said:

a c 120 ) Power supply
a b å Intel
a b K Overclocking
February 18, 2014 11:28:14 AM

Just so you don't leave here with the wrong knowledge on power needs, check out AnandTechs review:

As you can see, an overclocked 780 Ti with an overclocked extreme edition CPU don't even touch 400w. You could run a pair of 780 Tis in sli with 750w power supply.

Power supply needs are quality over quantity, which is why I listed quality power supplies. A 750w psu isn't necessary in the slightest for any single card build. 650w is even overkill, as long as you buy a quality unit. More =/= better.

That said, a 750w psu won't hurt you, just wanted to point out that it won't do anything more or better for you.