Is 80 plus 600 w would be enough for water cooled i5 4670k with gtx 770 or 780

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That is an interesting pairing there, a bargain level PSU with a high priced GPU seems weird.

If its the old CX 600 I wouldn't do it
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139019
If its the newer CX 600 that is bronze rated it could run it
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028

But if you are WCing i assume you also intend to OC which means you should really step up to something with more power available and better voltage regulation. I would go for something like the XFX 650, it is meant to be a midtier unit and gives you better Voltage Regulation than the CX series is intended to. For a bit more though you can step up to its big brother which gives you more capacity, full modularity...
That is an interesting pairing there, a bargain level PSU with a high priced GPU seems weird.

If its the old CX 600 I wouldn't do it
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139019
If its the newer CX 600 that is bronze rated it could run it
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028

But if you are WCing i assume you also intend to OC which means you should really step up to something with more power available and better voltage regulation. I would go for something like the XFX 650, it is meant to be a midtier unit and gives you better Voltage Regulation than the CX series is intended to. For a bit more though you can step up to its big brother which gives you more capacity, full modularity, excellent VReg, and very good ripple suppression for $20 more after MIR.
http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9
http://pcpartpicker.com/part/xfx-power-supply-p1750bbefx
 
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