When will the Nvidia Geforce GTX 880 come out?

We will be expecting it sometime later this year, specs have already been revealed/leaked .
It seem that it will use a little bit less power than the current 780ti which it will be replacing.

For the specs for 880 go to http://goo.gl/ZbzNgP

For all of your amazon need click on 

UK: http://goo.gl/jihj2Q
US: http://goo.gl/z0GLaE