My Asus X-99 Pro / NV GTX960 / Sierra 10.12 PB4 with all working. For graphics, start with nv_disable=1, patch/edit apple graphics control kext for your system def. (only for 6.1 - 15 or 17), install it and rebuild the cache and permissions. Install the last clover (now 3688 i think) with emuvariable64 and RC Scripts for the target volume and reboot. After, install the last nvidia web drivers and change the boot to nvda_drv=1. Reboot. For my system is working 100% from today in a 4K LG monitor (display port) with full resolutions and gpu acceleration. If all ok for you install cuda driver too. Good luck.