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Should i upgrade My psu for GTX 580 ?

post #1 of 15
Thread Starter 
Recently I bought a new Gigabyte GTX 580 which is factory overclocked to replace my old 5870 . My rig is core i7 870 ( 4.00GHz OC ) , 8 Gig ram, 2 HDD , 1 optical Drive and 7 fans. I never encounter any power related issue so far with my Corsair 550 watt. But now i can see in nvidias site that to smoothly run GTX 580 , i need a minimum of 600W PSU !! I was wondering if i can run this card with my current PSU , that is corsair vx 550 watt ( (+12v @ 41amp) without any trouble ? Please im in a tight budget so i really can use some helpful information . Many sites tell that A gtx 580 can be ran on machine with 550 watt. Hence im confused whether i should buy a new PSU or can keep using my corsair vx 550 ??
post #2 of 15
I think you have this card tested here which consumes 243watts on its own:
http://www.guru3d.com/articles_pages/gigabyte_geforce_gtx_580_so_review,7.html

They're using a power hungry test bed like yours and it maxed @ 391watts (GPU load 100%).

My guess is you're ok with that PSU, but you're also right on the edge with that card & an oc'ed 870 as well.

So its your call.....
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TheSadFlute
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post #3 of 15
Thread Starter 
thankz . thats ease a little pressure . I new i might need a new PSU , hence i bought a Gigabte superb 720 which delivers 610 w . But then i realized that gigabyte arent very good in PSU and this unit has triple +12V rail ( 18 A each rail ) wheres my corsair is VX series and has single +12v rail ( 41 amp ) . I looked everywhere and i couldnt find any good recommendation or even a small review of the gigabyte PSU and even if i can find any, it is generally negative !! Now im really confused , which PSU i should use ? Corsair VX 550 watt single 41 amp +12v rail ? Or the Gigabyte superb 720 , 610watt with triple +12v (18A) PSU ? and also need expert idea , whether the limited 18A triple +12v rail is enough for GTX 580 ?
post #4 of 15
Nvidia states 600w to account for the shoddy power supplys that say 600w, but actually put out 400w.

Your 550w is a pretty decent unit and is more then enough for a gtx 580 with heavy overclocks.
    
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post #5 of 15
i would look on OCN's PSU DB
http://www.overclock.net/t/183810/faq-recommended-power-supplies

and fined one of the recommended PSU's in your country and meets your budget

probably a 600 - 650 watt unit smile.gif
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post #6 of 15
Quote:
Originally Posted by sakibchy View Post

thankz . thats ease a little pressure . I new i might need a new PSU , hence i bought a Gigabte superb 720 which delivers 610 w . But then i realized that gigabyte arent very good in PSU and this unit has triple +12V rail ( 18 A each rail ) wheres my corsair is VX series and has single +12v rail ( 41 amp ) . I looked everywhere and i couldnt find any good recommendation or even a small review of the gigabyte PSU and even if i can find any, it is generally negative !! Now im really confused , which PSU i should use ? Corsair VX 550 watt single 41 amp +12v rail ? Or the Gigabyte superb 720 , 610watt with triple +12v (18A) PSU ? and also need expert idea , whether the limited 18A triple +12v rail is enough for GTX 580 ?

Rail is not power. Its like a circuit breaker that shuts off the power when its maximum rated is reached or exceeded & has nothing to do with the quality of the PSU. When the design of the PSU is good, most multi-rail setups are better/safer than single rail. If you want to know more about it:
http://www.overclock.net/t/761202/single-rail-vs-multi-rail-explained

Regarding the Gigabyte PSU, I can't find it here:
http://www.overclock.net/t/183810/faq-recommended-power-supplies

And frankly, if its not listed there then its not a worthy PSU. Stay with your Corsair, it won't damage any components if under-powered.

Put a heavy load on the 580 & the 870 and check for stability....
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TheSadFlute
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post #7 of 15
18A is plenty if the GTX580 is connected to 2 rails - one for the 8 pin and one for the 6 pin. If it's one 12v rail that's supplying both then you are over the rating - 250 watts or so is about the total peak draw of a stock 580, so 18A=216W might hold out but it's not advisable. I'm not sure what the balance is between the 8 pin and 6 pin, but certainly if you were giving each up to 216 watts, and the total peak draw of the card was 250, I think that would be OK.

I think 550 watts ought to do it, but as someone else said, you're not far from the limit. It's nice to have some extra room for a margin of error in your PSU, but if you're on a tight budget I think you'll probably be OK with 550 watts as long as you don't OC the graphics card - the increase in power consumption with an overclock is quite considerable.

That said, my system with 2 580s before I added the third was about 700 watts with more HDDs etc. than you have, but I expect my CPU is a bit less power hungry than an 860. If it was 700 watts with 2 of them, one can't have been over 500 but I don't think I've ever tested that.

If you want to find out for sure, get a kill-a-watt or stick a multimeter (obviously with sufficient current capability) on there and see what you're drawing.

I don't know much about those particular PSUs, but if you want to find out more JonnyGuru is the place to look for PSU reviews if he's covered them.
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post #8 of 15
Corsair vx 550 has 41 amps on the 12v rail as stated in the OP and is plenty for a gtx 580 with heavy clocks.

I ran two 750core GTX 480s( more power hungry than a gtx580 ) off of a Kingwin Platinum 550w for a month. Cpu was a 990x clocked at 4.6GHz. 12v rail on that psu is 45.5amps.

I'm 100% sure 41 amps is more than enough for one measly gtx580.
    
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post #9 of 15
Thread Starter 
Quote:
Originally Posted by eXXon View Post

Regarding the Gigabyte PSU, I can't find it here:
http://www.overclock.net/t/183810/faq-recommended-power-supplies
And frankly, if its not listed there then its not a worthy PSU. Stay with your Corsair, it won't damage any components if under-powered.
Put a heavy load on the 580 & the 870 and check for stability....


I just found out gigabyte superb 720 PSU is actually made by FSP group !

And here is the unit i purchased, it says it has Japanese capacitor , and 80+ certification
http://www.gigabyte.com/products/product-page.aspx?pid=2793#kf
post #10 of 15
Thread Starter 
Thank for the info, i appreciate .
Im thinking to run the GTX 580 anyway with the 550watt for a month or two without any OC of course and then i would buy a 750 watt PSU when i happen to have the budget. Im living in bangladesh and i have very limited option. The corsair i have now , was bought from thailand when i visited that country @ 2010. In my country i only can find TT . Any recommendation for a 700 watt TT within $ 130 would be much appreciated .
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