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Do I need a bigger PSU?

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  • Power Supplies
  • Graphics Cards
  • Systems
Last response: in Systems
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April 30, 2014 11:15:14 AM

This is the GPU I have: EVGA GeForce GTX 760 2GB Dual Superclocked ACX Video Card.

I want to add another one.

This is the PSU I currently have: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply.

I used my PcPartpicker build and added another 760 and the estimated wattage is 574W.

Would I be okay to keep my current PSU or would I have to get another??

I'm afraid 574 is too close to 620.

More about : bigger psu

Anonymous
April 30, 2014 11:31:28 AM

The SLi uses a few more Watts, but if you have calculated the power supply on maximum CPU + GPU usage, then you are fine.

The SeaSonic is not a PSU to get afraid of, its reliable, and that 574W is when your computer is handling multiple very hard tasks at once, and its unlikely to happen.
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a b ) Power supply
a c 118 U Graphics card
April 30, 2014 11:33:30 AM

I wouldn't do this. It getting too close and you will be unable to have any headroom. Also you don;t have enough 6+2 pin power connector to SLI. Aim for 750W power supply .
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Anonymous
April 30, 2014 11:38:53 AM

don't overclock the gpu ,u will be fine.
although its better to use a single powerful gpu than two in xfire/sli
unless ur mobo have same two x16 speed pci-e slot.
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a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 11:52:43 AM

It would work, but definitely wouldn't be a long term solution. Your system will run around 550w at max load, but you'll be pulling about as much as the +12v rail can deliver. I would recommend a new power supply if you can.
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a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 11:54:27 AM

Anonymous said:
don't overclock the gpu ,u will be fine.
although its better to use a single powerful gpu than two in xfire/sli
unless ur mobo have same two x16 speed pci-e slot.


A single GPU over SLI/Crossfire isn't 'better', it's just recommended for future upgradeability. NVIDIA SLI doesn't have the driver problems AMD deals with, and two 760s will perform better than a single GPU of equivalent price.

The point about 2 x16 slots doesn't really make a difference either, as PCIe 2.0 x8 only performs minimally slower than PCIe 3.0 x16 in the real world.
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Anonymous
April 30, 2014 12:01:00 PM

Really huh?? is 2 x gtx 760 2gb worth around 460$ better than a gtx 780 3gb (THE best gpu for money rather than a 1000$ titan)worth the same price???
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a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 12:13:02 PM

The 780 is definitely not THE best GPU for the money. And yes, 2 760s will beat a 780 by about 20%: http://www.tomshardware.com/reviews/geforce-gtx-760-vs-...

You can find a 290x for around $550 now, which is about as fast as a 780 Ti, while costing just a little more than the 780.
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April 30, 2014 12:53:28 PM

Okay. Say I'm going to go ahead and swap out PSUs just to be safe. What do you think. 750 - 800W?
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Best solution

a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 1:00:25 PM

If you're getting a new PSU as well, I would go for an 850w unit. 750w will do just fine, but 850w will put you right around peak efficiency at load, and will last longer. I would go for something like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Will be perfect, and SeaSonic quality means you won't have to worry about it :)  Antec also has their HCG850 that sells for around the same prices usually. If you don't want to spend that much, a 750w would definitely work. Something like:

http://www.amazon.com/dp/B009YC3DBS/?tag=pcpapi-20
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April 30, 2014 1:07:41 PM

Nice. I think I might just do it that way then. Probably go with an 850W, plus full modular would be nice.
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a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 1:17:04 PM

Full modular is pointless unless you have dual-power supplies. Semi-modular costs less, and with fully modular, you still need to connect the 24-pin and 8-pin, so fully modular isn't worth it.

But if you find a good deal on one, there's no reason not to I guess lol
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April 30, 2014 2:27:13 PM

Oh, well the SeaSonic you suggested is full modular. My current isn't modular at all and was a pain in the ass. I just figured a full mod would be easier. Anyways, thanks for your help!
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a c 120 ) Power supply
a c 147 U Graphics card
April 30, 2014 2:37:18 PM

Yeah, that's why I added the 'if you find a good deal on one' to the end! lol But yes, non-modular sucks, I will never have one, ever lol Enjoy whatever you end up with!
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May 1, 2014 8:02:44 AM

Lol. Thanks again man!
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!