It will work fine , however it's 1300w and that's a lot of watts, why are you wanting to go with such a high amount of watts. What are you putting in your computer that is going to require that much power?
As you can see by my sig I have a similar build and when you start adding water cooling then you are adding extra parts that need power. I went with the Seasonic 1250w since my total power draw is around 900w, it's always better to have too much then not enough.
Seasonic X-1250 1250W is 90% Efficient PSU, One of the finest when money is no object
Your draw is 900W so your consumption is just about 810W that gives you enough room for 3 way SLI
Im running a 670FTW with 195W TDP on a Seasonic s12 620W
My draw on full load is just about 300W
So given its 85% my consumption is 255W
That should allow me a 2Way SLI I suppose down the road
Which I might do sometimes soon depends on a new 144Hz purchase