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Maximum GPU power draw for my PSU

Last response: in Components
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March 9, 2012 9:49:46 PM

I have a power supply unit wich has two 12V rails, (12V1 14A 168W) and (12V2 16A 192W). My power supply unit is not brand PSU. It has no 6-pin conector, and i has 3 x 4-pin molex conectors. Can I install a graphics card that requires 130W TDP with an 6 to 4 pin conector ofcorse? My processor has 70W total power draw.
a c 716 ) Power supply
March 10, 2012 12:30:40 AM

Probably! What is your total power?
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March 10, 2012 7:04:13 AM

My PSU total power is 434W, but I don't see what that has to do with anything because bouth the CPU and GPU in curent sistems are powerd from 12V rails. Thanks for answering!
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March 10, 2012 7:26:07 AM

A 7750 is probably your best bet! Since you have no 6 pin. And the card uses only 55watts!
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March 10, 2012 8:07:05 AM

I understand that, but my question still stands.
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March 10, 2012 8:35:22 AM

Suggestion to you that get yourself a new one from Corsair, Antec or Seasonic. The prices of these quality PSU should be value for money. Google all the PSU from the site!
I am sure you don't want to risk your PSU and GPU and other components with your current PSU!
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March 10, 2012 11:10:31 AM

This is very
interesting. Tom's Hardwere
Forum is most popular
forum for computer
hardwere and probably the
best. But when ever I asked
a question I would never get
a simple answer with an
explanation, only suggestions
that are no worth to me. I mean no
offence ofcourse.
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Best solution

a c 716 ) Power supply
March 10, 2012 11:23:01 AM

kosmos_oc said:
My PSU total power is 434W, but I don't see what that has to do with anything because bouth the CPU and GPU in curent sistems are powerd from 12V rails. Thanks for answering!

It will do it as long as the total wattage for the +12 volts is around 300watts or more (not as simple as adding the two rails together).
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March 10, 2012 11:27:46 AM

Thank you wery much. How can I know what is on wich rail?
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March 10, 2012 11:29:19 AM

Best answer selected by kosmos_oc.
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a c 716 ) Power supply
March 10, 2012 11:30:52 AM

Usually they list combined rating for the +12 volts in watts somewhere on the sticker.
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March 10, 2012 11:35:56 AM


Even by doing the 'math' it does not mean things will come together and work.

Yes . . . a 16-amp 12-volt rail by theoretical spec has 196w, but your available clean power in a generic brand power supply may be substantially less.

In fact, even with no load on the rail, overall system 'ripple' may be well outside ATX specifications.

OCCT has a feature that will chart system power over load test runs --- it may be a great place for you to start and see how the PSU performs under various loads.

And please remember our new motto at Tom's: Sometimes We Ain't Just As Smart As We Think We Is


:D 


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