What PSU i need

How much power do i need. to do overclock with all this parts.I am just worried i buy a PSU power is too little.

Intel I7-760
ASUS P7P55D EVO
Sapphire 5870 1GB
4x 2GB RAM DDR3
Creative X-fi titamium
2x 500 GB 7200 rpm hard disk
Lite-on 24x DvD burner
5 answers Last reply
More about what need
  1. A high quality 650w unit will power that according to the Corsair psu calculator.
    So a Corsair,Antec,XFX,or Seasonic at 650w will do the job.
  2. davcon said:
    A high quality 650w unit will power that according to the Corsair psu calculator.
    So a Corsair,Antec,XFX,or Seasonic at 650w will do the job.


    I want to get a Corsair HX PSU but i am just worried as different PSU calculator have different results. Hmm but if I want to do crossfire in the future and extremely overclock graphics card and CPU I will need 1000 watts....
  3. progunnerboi said:
    I want to get a Corsair HX PSU but i am just worried as different PSU calculator have different results. Hmm but if I want to do crossfire in the future and extremely overclock graphics card and CPU I will need 1000 watts....

    You're correct if you xfire something you should have mentioned in your original post.
    I used two different calculators with similiar results and the HX series is excellent i have one.
    http://www.corsair.com/
    http://educations.newegg.com/tool/psucalc/index.html?Tpk=psu
  4. davcon said:
    I used two different calculators with similiar results and the HX series is excellent i have one.
    http://www.corsair.com/
    http://educations.newegg.com/tool/psucalc/index.html?Tpk=psu



    Hmmm I wonder if i should get a HX750/850/1000. I dun know whether i will bother to overclock my CPU and GPU.If should 750 would be fine.Well If i Bother to overcome or crossfire,850 would be a better choice.And if i decide to do both 1000 watts.
  5. progunnerboi said:
    Hmm but if I want to do crossfire in the future and extremely overclock graphics card and CPU I will need 1000 watts....

    I can't say for sure about overclocking graphics cards, but overclocking a CPU will not significantly affect overall system power consumption.

    Overclocking a CPU will increase its power consumption by about 25% or from about 7 or 8 amps to 10 or 11 amps.
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