Sufficient enough PSU

I recently purchased parts that are on the way, and have started to get concerned that my psu is cutting it close.

My PSU: nzxt hale 90 750w
Relevant factors:
I7 3770k hopefully ocd to 4.6ghz
Swiftech h220 when it releases
5 additional 140mm case fans
2 gtx 670s SLI
Some LEDs for craps
1 tb 7200 rpm hdd
120gb ssd
DVD write/read

Is the 750w cutting it too close? Will it permit over clocking?
Thank you
6 answers Last reply Best Answer
More about sufficient
  1. Nah, that's a good power supply, so you'll be fine.

    If it were a cheap 750w, then you might be in trouble, but NZXT is reliable.
  2. i think you're safe
  3. Best answer
    nVidia itself recommend 500W for a single 670.

    For testing conducted for SLI 670, the resulting system consumption for SLI is 433W of which 293W are attributed to the gpu cards.

    If you use this psu calculator considering your components, the result is 564W (overclocked processor & used 680x2 to simulate gpu OC:

    All points out to 750W being more than enough.
  4. thanks a lot guys, i figured it would be okay, esp it being a quality psu. I just tend to worry at the end out of excitement =P
  5. Best answer selected by dakotaritz.
  6. No problem.Your welcome.
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