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What wattage power supply for a i7 4790k?

Hello

What wattage power supply should I use for a pc with a i7 4790?

It will have ssd, GTX 660, dvd drive, 1TB hd, 16 gigs of memory, maybe some lighted fans, and later will upgrade to a 780 or 800 series and maybe the tital if I can swing it.

I have a 750 watt psu that is about 3 years old. It works fine. Can I use that?
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More about wattage power supply 4790k
  1. Yes of course you can! But if you want a new one you can get this one :

    http://pcpartpicker.com/part/xfx-power-supply-p1550sxxb9

    Also you can check this out:

    http://www.tomshardware.co.uk/answers/id-1853598/sufficient-power-supply-gtx660.html

    It might be helpful...
  2. g335 said:
    Hello

    What wattage power supply should I use for a pc with a i7 4790?

    It will have ssd, GTX 660, dvd drive, 1TB hd, 16 gigs of memory, maybe some lighted fans, and later will upgrade to a 780 or 800 series and maybe the tital if I can swing it.

    I have a 750 watt psu that is about 3 years old. It works fine. Can I use that?


    Hi - A true 750w unit is more than enough for that system. You didn't specify brand/model of the
    PSU, need to know that to insure it's a true 750 and being 3 yrs old there's a good
    chance it's not Haswell compatible.

    Plz list brand/model.
  3. toyftw said:
    g335 said:
    Hello

    What wattage power supply should I use for a pc with a i7 4790?

    It will have ssd, GTX 660, dvd drive, 1TB hd, 16 gigs of memory, maybe some lighted fans, and later will upgrade to a 780 or 800 series and maybe the tital if I can swing it.

    I have a 750 watt psu that is about 3 years old. It works fine. Can I use that?


    Hi - A true 750w unit is more than enough for that system. You didn't specify brand/model of the
    PSU, need to know that to insure it's a true 750 and being 3 yrs old there's a good
    chance it's not Haswell compatible.

    Plz list brand/model.



    Its a Scythe
  4. Best answer
    g335 said:
    toyftw said:
    g335 said:
    Hello

    What wattage power supply should I use for a pc with a i7 4790?

    It will have ssd, GTX 660, dvd drive, 1TB hd, 16 gigs of memory, maybe some lighted fans, and later will upgrade to a 780 or 800 series and maybe the tital if I can swing it.

    I have a 750 watt psu that is about 3 years old. It works fine. Can I use that?


    Hi - A true 750w unit is more than enough for that system. You didn't specify brand/model of the
    PSU, need to know that to insure it's a true 750 and being 3 yrs old there's a good
    chance it's not Haswell compatible.

    Plz list brand/model.



    Its a Scythe


    Hi again - Scythe has several 750's, but they're all mfg by the same OEM - Sirtec. So, the
    unit has more than enough power for your system, but is not Haswell ready.

    You can still use it, but you should disable the sleep state function in BIOS.
  5. Dear g335, as a general rule, the efficiency of power supply is max at half of the wattage of SMPS. For example smps with 700W will give best efficiency at about 250 to 300 W. So if your load is about 250W. 650W to 700W would be OK
  6. Kishore Kamal said:
    Dear g335, as a general rule, the efficiency of power supply is max at half of the wattage of SMPS. For example smps with 700W will give best efficiency at about 250 to 300 W. So if your load is about 250W. 650W to 700W would be OK


    Thank you
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