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Power supply requirements

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  • Power Supplies
  • Gtx
  • SLI
  • Components
Last response: in Components
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February 2, 2013 10:16:28 PM

Hello, I have a 2x GTX 550 ti and I was just wondering if this psu could handle two GTX 550 ti in SLI?
http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

More about : power supply requirements

a c 308 ) Power supply
February 2, 2013 10:26:27 PM

ndurin said:
Hello, I have a 2x GTX 550 ti and I was just wondering if this psu could handle two GTX 550 ti in SLI?
http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...


I couldn't find that model in realhardtech psu database, but
the specs on the model linked are sufficient to run
2 550ti's in SLI.

I'd feel better if I could find a quality review of it.

What concerns me is there are several TT PSU's on johnnyluck.org
PSU Lemon List and none on his recommended list.
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February 2, 2013 10:37:12 PM

But that PUS is only 500w, one GTX 560 ti needs 500w. Are you sure this PSU can handle two handle two of them? Its fairly cheap and I don't want to get if it can't handle my 550 ti's in SLI, would it even handle them at full load?
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February 2, 2013 10:48:55 PM

According to Nvidia, a single GTX 550ti requires a 400W PSU with 24A on the +12Vdc rails. Max draw is ~120W under load.

So, no, get a bigger supply. I'd recommend at least 650 watts by a known, reputable manufacturer such as Seasonic or Delta.
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a c 308 ) Power supply
February 2, 2013 10:49:57 PM

ndurin said:
But that PUS is only 500w, one GTX 560 ti needs 500w. Are you sure this PSU can handle two handle two of them? Its fairly cheap and I don't want to get if it can't handle my 550 ti's in SLI, would it even handle them at full load?


you posted above 2 - 550ti's not 560ti.
there is a difference.

one 550ti needs 400w (whole system not just card) and that has some headroom.

If in fact you are going to SLI 2 560ti's (not 550ti)
then you need 700w (some wiggle room) & 4 pci-e connectors(instead of 2)
and I would suggest a quality brand as well.
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February 2, 2013 10:54:57 PM

Oh In your first post I read 560 ti where you had written 650 ti, sorry my mistake, so no I am not doing a 560 ti sli just a 550 ti sli, so will that PSU be good enough for a 550 ti sli? It says it can peek at 600w.
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February 2, 2013 11:13:21 PM

lol bit out of my budget that the same price as one 550 ti :p 
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a c 308 ) Power supply
February 2, 2013 11:15:14 PM

ndurin said:
Oh In your first post I read 560 ti where you had written 650 ti, sorry my mistake, so no I am not doing a 560 ti sli just a 550 ti sli, so will that PSU be good enough for a 550 ti sli? It says it can peek at 600w.


Ah - OK we both had typo's then.
So, to SLI 2 550ti's you need 500w, not 650
this is according to realdhardtechx and
that is their expertise.

GPU mfg's will overstate power req to cover
among other things PSU brands that ouright lie
on their publ specs.

To be honest with you, that is my concern with the TT
you linked. If it can meet it's publ specs it will SLI
2 550ti's, if not.......................

Have you purch the PSU yet?
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February 2, 2013 11:48:26 PM

I have not, my friend bought it and he is giving it to me for $30 he has not used it yet since he got a better gpu at the last moment, It would take me some time to save up to $90 for the seasonic PSU but I do really like the modular design, could I use Thermaltake one for a few months until I can buy the seasonic one? Would it do any damage to my system?
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a c 308 ) Power supply
February 2, 2013 11:53:58 PM

ndurin said:
I have not, my friend bought it and he is giving it to me for $30 he has not used it yet since he got a better gpu at the last moment, It would take me some time to save up to $90 for the seasonic PSU but I do really like the modular design, could I use Thermaltake one for a few months until I can buy the seasonic one? Would it do any damage to my system?


Personally, I don't trust the TT. If you haven't bought it (I thot you already owned it)
then I'd suggest a known to be good quality psu.

What can you afford?

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February 2, 2013 11:56:34 PM

Well buying a brand new PSU for me is not an option right now, I don't have the time to save the money up, I have to get a temp one so I can use my computer until I can buy a good one.
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a c 308 ) Power supply
February 3, 2013 12:03:32 AM

ndurin said:
Well buying a brand new PSU for me is not an option right now, I don't have the time to save the money up, I have to get a temp one so I can use my computer until I can buy a good one.



OK - use the TT, it's publ specs will run the sys,
my only concern is the quality of the TT, so
go with it for now.

Tom
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February 3, 2013 12:07:36 AM

Alright thanks, Ill do that for now I guess.
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!