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What PSU would you recommend for new gaming rig?

Posted on 2009-06-30
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Last Modified: 2013-12-27
I'm in the process of planning a new PC but it's been afew years since i built one so not sure on the current power requirements of PC's.

CPU: I7- 920
MB: GA-EX58-UD4P
RAM: 6 gig
Graphics: ATI HD4870  times two.
Misc: 1gig HDD, DVD Burner
Case: CM - Storm Scout

Was going to add 3x 120mm fans to the case, already comes with 2x 140mm and a 120mm. Not sure about aftermarket cooler on the CPU or not, was going to wait and see how how it runs with good case cooling.

So my question is what wattage do i need from a PSU? Prices go up dramatically from 750w costing almost double for a 850w. I can get a 1300w Tagan for twice the price of a 750w Tagan and only $30 more than a 850w Tagan. But what do i really need? It's a gaming PC so i won't be stacking HDD's or CD Drives into it.

Cheers.
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Question by:andoss
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6 Comments
 
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by:Diesel79
Diesel79 earned 300 total points
ID: 24751168
A 750 should be sufficient. Check the power draw on your video boards to double check. Usually they will say they require a specific wattage supply. I think most requre a 450 these days and if you are not stacking drives you should have plenty with the 750.
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Billy Roth earned 450 total points
ID: 24751179
750 watts should be sufficient if it is a good part.  quality manufacturers like pc power and cooling rate thier psus at running temp output, while cheaper parts are rated at cooler temp outputs which is a tad misleading.  also better parts have more consistent voltage which will affect stability.  i would rather go with a lower wattage quality part myself than a high output budget part if money is a concern.  i would first look at pc power and cooling, then coolermaster, ocz, antec and so on.   obviously if you go with a cheaper part you will need to go with a higher output rating.
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by:Billy Roth
ID: 24751185
and just to clarify on two 4870s, with less than 700w you will see performance decrease.
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Author Comment

by:andoss
ID: 24751193
I was under the impression that 'Tagan' are well known for quality PSU's, not true?
I like Antec but they make you pay more by making in LED's and stuff that's not needed.
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by:Billy Roth
ID: 24751217
i think antec has a flashy image but i do not think they are overpriced.  they tend to be quiet and cool for thier product class.  tagan is decent but i still recommend pc power and cooling well before anyone else, then coolermaster and ocz, then antec.  check out maximum pc forums, they have used pcpowerandcooling on thier dream machine issue every year because they simply are the best.
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by:andoss
ID: 24751464
Thanks i'll go with a 750w Antec as my supplier doesn't sell pc power and cooling psu's.
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