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GTX 560 ti 448 2 12V rails at 20A

I'm considering buying the GTX 560 ti 448 but I'm curious about its power requirements. Since the card requires two 6-pin connectors on a minimum 38A rail, will a PSU with multiple 12V rails at 20A will be sufficient for the card to run at its peak stock efficiency? Also, when a graphics card requires a minimum of X amps, will it ever draw more amperage than that under load? (Overclocking aside.)
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  1. That's the reason for the two 6 pin connectors so it can get the amps needed and it may consume more watts if overclocked or under 100% load. The rating is for 100% load and that's what it needs for that.
  2. get a PSU. 2 12v rails @ 20 amps gives you 40 amps... just over the 560's 38 amp requirement so you are gonna need more juice for all the other components. I hate psu's with multiple 12v rails for this reason http://www.tomshardware.com/forum/306437-28-single-rail-multiple-rails-eternal-question-answered but this PSU should do the trick just fine http://www.tomshardware.com/forum/306437-28-single-rail-multiple-rails-eternal-question-answered
  3. Thanks for the fast reply. So the answer is, yes, a power supply with four 20amp rails will be sufficient?
  4. joemama069 said:
    get a PSU. 2 12v rails @ 20 amps gives you 40 amps... just over the 560's 38 amp requirement so you are gonna need more juice for all the other components. I hate psu's with multiple 12v rails for this reason http://www.tomshardware.com/forum/306437-28-single-rail-multiple-rails-eternal-question-answered but this PSU should do the trick just fine http://www.tomshardware.com/forum/306437-28-single-rail-multiple-rails-eternal-question-answered


    Fortunately, the PSU has 4 rails at 20 amps.
  5. What exactly is the power supply that you have?
  6. AdmiralAckbar said:
    I'm considering buying the GTX 560 ti 448 but I'm curious about its power requirements. Since the card requires two 6-pin connectors on a minimum 38A rail, will a PSU with multiple 12V rails at 20A will be sufficient for the card to run at its peak stock efficiency? Also, when a graphics card requires a minimum of X amps, will it ever draw more amperage than that under load? (Overclocking aside.)

    1. It's a manufacturer reccomendation not a set in stone requirement ( 'cept for the 2x 6 pin connector's )
    2. It's total 12v output of the psu not single rail output
    3. Multiple 20a rails ? What's the combined output ? Usually find it on the label, or you could say which psu you have

    Too slow by 11 seconds :(
  7. Best answer
    You should have no problems running that video card with your power supply , you have more than enough power.
  8. http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3276567&CatId=2533 been running strong for 4 years... it runs a regular 560ti, 2500k @ 4.5, 2 WD velociraptors 1tb WD black and an optical drive... i know i make it scream in pain cause im sure its the bare minimum for my system
  9. Thanks for the input everyone. It's rather embarrassing having to ask such a question as a sys admin but I've honestly never looked into the details of PSUs (never had to really). Given the age of my PSU I thought it best to ask.

    Thanks again! ...Now I'm off to brush up on PSUs! :)
  10. Best answer selected by AdmiralAckbar.
  11. It's always better to ask then try to do something your not familisr with and maybe damage the part. I have answered a lot of questions here at Tom's but when I'm not sure about something I don't hesitate to post a question here.
  12. This topic has been closed by Mousemonkey
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