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power supply and ups question

i have an i7 6700k running at 4.3 ,32gb ddr4 ,2 ssd 500gb, 3 sata hdisks and a gigabyte gtx 1080 (not ti ).i want to change my power supply cause its old and an overkill ,but i am not sure about the watts.Also i might pick another gtx 1080 for sli,not sure yet.So, my question is ,first , how many watts it should be with sli in mind (apc calculator suggests 750), and second ,i need a ups too for the pc and a 24 inch screen cause i am having problems with the power in my block and i need something to protect me.Dont care for more than a 2 minute battery just for a proper shutdown,what i am interested is protection against any surge.i am having trouble understanding the proper watts /va for the ups,so any help would be really welcome. budget is kinda and issue so cant go for those 400 dollars ups
Reply to vlasis
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More about power supply ups question
  1. The power supply unit (PSU) should be at least 700 Watts or greater to properly handle two GeForce GTX 1080 graphics cards in 2-way SLI mode.

    https://pcpartpicker.com/product/MfJwrH/evga-power-supply-220g20750xr

    For a UPS: https://pcpartpicker.com/product/qvVBD3/cyberpower-ups-cp1500pfclcd
    Reply to ko888
  2. ko888 said:
    The power supply unit (PSU) should be at least 700 Watts or greater to properly handle two GeForce GTX 1080 graphics cards in 2-way SLI mode.

    https://pcpartpicker.com/product/MfJwrH/evga-power-supply-220g20750xr

    For a UPS: https://pcpartpicker.com/product/qvVBD3/cyberpower-ups-cp1500pfclcd


    So,if i understand correctly,the numbers i should focus at are 750w for a psu and a ups of 1500va/900w ?
    Reply to vlasis
  3. Best answer
    vlasis said:
    ko888 said:
    The power supply unit (PSU) should be at least 700 Watts or greater to properly handle two GeForce GTX 1080 graphics cards in 2-way SLI mode.

    https://pcpartpicker.com/product/MfJwrH/evga-power-supply-220g20750xr

    For a UPS: https://pcpartpicker.com/product/qvVBD3/cyberpower-ups-cp1500pfclcd


    So,if i understand correctly,the numbers i should focus at are 750w for a psu and a ups of 1500va/900w ?


    700W PSUs are not that common. It's easier to get a 750W PSU.

    The UPS, that I recommended, has a pure sine wave wave form that is usually needed by current modern PSUs that use APFC (i.e. Active Power Factor Correction) so that the UPS will correctly switch over to battery backup mode when there is a power interruption event.

    A non-sine wave (a.k.a. stepped sine wave or something similar) UPS may fail to correctly switch over to battery backup mode, when there is a power interruption event, usually due to an incompatibility between the PSU's APFC circuit and the non-sine wave output of the UPS when the UPS is operating in battery backup mode.
    Reply to ko888
  4. ko888 said:
    vlasis said:
    ko888 said:
    The power supply unit (PSU) should be at least 700 Watts or greater to properly handle two GeForce GTX 1080 graphics cards in 2-way SLI mode.

    https://pcpartpicker.com/product/MfJwrH/evga-power-supply-220g20750xr

    For a UPS: https://pcpartpicker.com/product/qvVBD3/cyberpower-ups-cp1500pfclcd


    So,if i understand correctly,the numbers i should focus at are 750w for a psu and a ups of 1500va/900w ?


    700W PSUs are not that common. It's easier to get a 750W PSU.

    The UPS, that I recommended, has a pure sine wave wave form that is usually needed by current modern PSUs that use APFC (i.e. Active Power Factor Correction) so that the UPS will correctly switch over to battery backup mode when there is a power interruption event.

    A non-sine wave (a.k.a. stepped sine wave or something similar) UPS may fail to correctly switch over to battery backup mode, when there is a power interruption event, usually due to an incompatibility between the PSU's APFC circuit and the non-sine wave output of the UPS when the UPS is operating in battery backup mode.


    thnx alot for your info man,really helpfull. one last thing, the ups ,its noise ,how is it if you know,loud or quiet?
    Reply to vlasis
  5. vlasis said:
    thnx alot for your info man,really helpfull. one last thing, the ups ,its noise ,how is it if you know,loud or quiet?


    I do use the CyberPower CP1500PFCLCD UPS. It doesn't make any noise when it's not in battery backup mode.

    During a power interruption event there is a beep alarm that will sound. The alarm can be disabled from the UPS' LCD control panel if you don't want to hear any alarms. I don't even hear any humming from the UPS while it's operating in battery backup mode or at any other time.
    Reply to ko888
  6. ko888 said:
    vlasis said:
    thnx alot for your info man,really helpfull. one last thing, the ups ,its noise ,how is it if you know,loud or quiet?


    I do use the CyberPower CP1500PFCLCD UPS. It doesn't make any noise when it's not in battery backup mode.

    During a power interruption event there is a beep alarm that will sound. The alarm can be disabled from the UPS' LCD control panel if you don't want to hear any alarms. I don't even hear any humming from the UPS while it's operating in battery backup mode or at any other time.


    i dont mind any sounds during its back up operation,i was asking during normal operation if it makes any noise,cause i usually let the pc on when i sleep ,but from what i understand its silent
    Reply to vlasis
  7. vlasis said:
    ko888 said:
    vlasis said:
    thnx alot for your info man,really helpfull. one last thing, the ups ,its noise ,how is it if you know,loud or quiet?


    I do use the CyberPower CP1500PFCLCD UPS. It doesn't make any noise when it's not in battery backup mode.

    During a power interruption event there is a beep alarm that will sound. The alarm can be disabled from the UPS' LCD control panel if you don't want to hear any alarms. I don't even hear any humming from the UPS while it's operating in battery backup mode or at any other time.


    i dont mind any sounds during its back up operation,i was asking during normal operation if it makes any noise,cause i usually let the pc on when i sleep ,but from what i understand its silent


    On the rare occasions (maybe once a month), when the UPS performs its automatic self test to determine battery condition, you may hear some switch-over noise.
    Reply to ko888
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