http://www.tonymacx86.com/graphics/123974-nvidia-web-drivers-10-9-x-mavericks-found.html
1. Install the driver from the first post.
2. Reboot and boot in to OS X using flag: nv_disable=1
3. Once logged in to OS X, At the top you should see the Nvidia logo (if you installed the web driver pkg) - Click once then choose: Nvidia web driver.
4. Reboot
5. Enjoy your 780 Ti with OpenCL support finally!
Note: Not sure about cuda yet but it's nice to actually be able to boot from the 780 Ti without using nv_disable=1... Using the OS like Safari looks normal and fast.
Edit: Since I'm finally able to use my 780 Ti I can now use my ASUS VG248QE monitor and Mavericks looks gorgeous running in 144hz refresh rate