How much power for my PC?

i used this site to calculate the power for my PC

my PC consist of:-

CPU : Core i7-2600k
MOBO : ASRock Z77 Extreme4
Graphics Card : 2x SLI EVGA GeForce GTX 670 2GB (note: 2 SLI cards)
SSD : Plextor M3 Series PX-128M3 2.5" 128GB
HDD : Seagate Barracuda 1TB
RAM : G.SKILL Ares Series 8GB (2 x 4) 1866
BD : LG Black 14X BD-R 2X BD-RE

the results was 643W

I made the test again to add some future's upgrades, and added (8 giga Ram + 1 PCI Card + 2 Hard Disk)

the result was 733w

so, is that include OC for CPU or not? & how much my pc need to be safe for long time?
5 answers Last reply
More about power
  1. That does not include overclock unless you put it in but 750watt PSU would work but 850watt will give you more headroom.
  2. 850 watt for sure. Because the 670 is a power house!
  3. jackattack223 said:
    850 watt for sure. Because the 670 is a power house!

    The 670 takes less power than the previous generation. I have 2 560 448s and an overclocked 3930k, so my system will draw more power than yours and it never takes more than 500w out of the wall (which means 450w from the psu). Your system will probably draw less than 400. I'd suggest a high quality 650w from the recommended psu list in the stickys.

    The power calculation sites always overstate power requirements, at least partly because many psus overstate their power output.

    See this link for actual results:
  4. Bare in mind that most 650watt PSU's do not have 4 x PCIe power connectors but 750watt + do.
  5. 850 watt XFX Core Edition 850 Pro Series (Seasonic) is about $85 here in Canada. 80 Plus Bronze certified. One of the better quality PS at this price point. Should have 4 PCIe connectors (2@6 and 2@8).

    Review here:
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