what graphic card should I use for my computer with a 300w PSU

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Gordon Qian

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Sep 7, 2013
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hi, I have a hp pavilion 500-96 desktop and it's equiped with a 300W PSU. these are the dc output of the PSU:
+3.3V, 12A; +5.08V. 13A; +12Va, 12A; +12Vb, 16A; AND =5.08Vsb, 2A.
the processor is core i5 3330S, it max TDP is 65W with the highest frequency of 3.2GHz. So about how much watts are left for a graphic card? I play 3d games a lot btw.
 
Solution
toyftw


Hi - the total +12v amps ia almost always less than the 2 rails added together (28), assuming they don't show
what the total +12v amps is, it looks like you'd be safe in running a gtx650ti, or hd7790 & 7850. However, all
three of those require a pcie connector(some 7850's require 2) which I don't think you have.

You can get a molex to pcie adapter or you can stick with an HD7750 which...
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toyftw

toyftw

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Jul 29, 2012
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Hi - the total +12v amps ia almost always less than the 2 rails added together (28), assuming they don't show
what the total +12v amps is, it looks like you'd be safe in running a gtx650ti, or hd7790 & 7850. However, all
three of those require a pcie connector(some 7850's require 2) which I don't think you have.

You can get a molex to pcie adapter or you can stick with an HD7750 which doesn't require one.

I'd try & find out the tot +12v amps, and if it's 24 or more go with at least the 7790 &
use the adapter, many gpu's include one thereby eliminating the need to purch one.

 
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Solution
ingtar33

ingtar33

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Dec 17, 2012
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the 7850 and 650ti BOOST are both 120-130W gpus... and likely will be pushing up against the limits of his psu. he never said which one he had so i went with the best sub 100W gpu anywhere.

and yes, the 7750 is probably the best 40W gpu in existence, if he doesn't have a 6 pin gpu plug, or the extra molex 4 pin plugs for an adapter in his case, then the 7750 is probably the best option for him
 
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toyftw

toyftw

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Jul 29, 2012
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No, if he has sufficient +12v amps he can run either of those, sytems with 650ti &
7850 require 20-21 +12v amps. If he has at least 24 he's good to go.
 
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Gordon Qian

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Sep 7, 2013
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can I combine the 12Va with +12Vb to get 28A? (12A + 16A) Sorry I forgot to clarify that my PSU do not have the molex connector, it only has the SATA power connector, and I don't want to max out the PSU for longevity.
 
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Gordon Qian

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Sep 7, 2013
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by the way, I'm planning to get a 1080p monitor, so will the 7750 still able to handle games sufficiently within 5 years with 1gb of graphic card RAM? or do I need a 2gb one?
 
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Kirosaka

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Aug 13, 2013
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Go for a 2Gb card just to be sure
And, no your 7750 won't be able to handle new games sufficiently for the incoming 5 years, atleast, if we keep on growing like this
I got a 300W PSU to, but if I were you I would probably save up for a PC upgrade or a hole new PC with atleast an 850TX PSU for SLI
 
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