If I purchase a PNY GeForce GTX 770 4GB, do I need to upgrade my power supply?

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joelb95

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Jun 10, 2014
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Wait what? You have a 770 2gb now and want to add a 4gb 770 for SLI? Sorry mate, that won't work very well. I guess it might work, but you will never use the full 4GB of the 4GB version, because SLI basically mirrors. So if one has 2GB, there's nothing to mirror above that 2GB of VRAM
 
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harryguymt

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Apr 28, 2014
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So could I get another MSI Geforce GTX 770 2Gb and a new psu?
 
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harryguymt

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Apr 28, 2014
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Sorry for the late reply.
Yes I am now planning to get a 2gb 770.
Does this mean I still have to get a new power supply?
 
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noob222

noob222

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Apr 3, 2014
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There are a lot of PSU calculators available on the web. The one at Newegg recommends 860W for your intended configuration. While you might be able to skate by with a smaller PSU. The one included with this system is probably a cheaply built OEM model that I would not personally push above 80% of its recommended load.

 
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