Can a 405W power Supply run the ATI Radeon 5770?

How many amps on the 12V rail does that power supply have?
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  1. Can my 405W power supply ruin the ATI Radeon 5770?

    The recommended power supply is a 450W + for the 5770, but i've read loads of threads and i heard a good 400W power supply is fine, however i just need to make sure my 405W power supply will work with the 5770

    I have a (405Watt, Make - CWT, Model - PUFP405P) power supply, i dont know if it's one of those very cheap ones, or a good one, but it was with a pc that i bought about 2 years ago for £700, so im not sure.

    Thanks a lot.
  2. Deemo13 said:
    How many amps on the 12V rail does that power supply have?


    You know, i have no idea :(
  3. You can find it on the label on the side of the PSU:

  4. Deemo13 said:
    You can find it on the label on the side of the PSU:

    http://www.build-your-own-computer.net/image-files/power-supply-in-case.jpg


    I just checked, i'm not 100% sure, but i think it's 3A, however there were other numbers, and 24A, 17A, 10A, but on the side it said 3A, so i think it's 3 amps, but not 100% sure, because it's all over with random numbers, volts and amps.
  5. I found a picture of my PSU on the internet,

    http://i43.tinypic.com/f2jwk0.jpg
  6. so its dual rail. it says 17amps per rail. you dont just add them though.

    405W/12 = 33Amps at best.

    This should be fine for a 5770 to be honest but depends what else is in your system. amperage for cards are overegged (5770 draws 108 w so 108/12volts = about 10 amps.

    However, it doesnt look like a great PSU as it has large amps on the 3.3/5 v rails, showing it is an older unit (newer PC components utilise 12v primarily).

    I would maybe recommend a nice PSU upgrade and the gpu at the same time.
  7. You have enough for a 5770.
  8. I hate when a power supply does not list the combined(for 12 volt rails).

    As said above you can not just add them.

    I would guess something in the 21-25 amp area to be honest.

    If the rest of the system is lite(not a power hungry overclocked to the nuts cpu). A 5770 will run just fine.

    This is a i5 750(under-volted for that extra power saving) + 5770 system with Just Cause 2 and Prime95 running :)
  9. OK Thanks a lot everyone.
  10. nukemaster said:
    I hate when a power supply does not list the combined(for 12 volt rails).

    As said above you can not just add them.

    I would guess something in the 21-25 amp area to be honest.

    If the rest of the system is lite(not a power hungry overclocked to the nuts cpu). A 5770 will run just fine.

    This is a i5 750(under-volted for that extra power saving) + 5770 system with Just Cause 2 and Prime95 running :)
    http://img841.imageshack.us/img841/3866/apcprimejustcause2.jpg



    Do you know how i can find out the amount of watts im currently using, like you showed in the picture? I've looked everywhere, but i cant find it :??:
  11. That is from my UPS unit( http://en.wikipedia.org/wiki/Uninterruptible_power_supply ).

    The cheaper way is to get a power meter/monitor( http://www.upm-marketing.com/products/em100.html )

    You can find those at many hardware stores.

    USA
    http://www.homedepot.com/h_d1/N-5yc1v/R-202048563/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=power+meter&storeId=10051#.UEexAZWlvmE
    I am sure you can find on at other stores as well.

    Canada
    http://www.homedepot.ca/product/enpower-appliance-meter/986181
    Canadian Tire has them as well under the Blue Planet name, but i did not see it on the website.
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