Is my power supply sufficient enough?

[AcidElement]

I am considering getting an OCZ ZX Series 850W Fully-Modular 80Plus Gold High Performance PSU (Found Here: http://www.newegg.com/Product/Product.aspx?Item=N82E16817341044) and my question is that will this power supply be sufficient enough for powering my system? I will be doing an SLI of ZOTAC AMP! GTX 560 GPU's and I want to make sure I'm not going to stress my computer for using too much power on the power supply. Thanks for the help

 

[iam2thecrowe]

that will be plenty. you could run 2 x gtx570's from that psu if you wanted to.

 

[AcidElement]

Best answer selected by AcidElement.

 

[AcidElement]

Thanks!