New Sierra build running slow + videos stall.

I've frequented this sub quite a bit, but rarely posted. My Hackintosh is an old one that stopped working, so recently I updated the build to Sierra and have it nearly working.

Right now I'm having boot issues (runs fine in verbose mode, but crashes on startup some times - don't know if that's connected) and also having speed issues. When a video loads, it stalls. The sound plays but the video freezes, then catches up. When I open a new app, it stutters, then the app loads.

My set up is as follows: Mobo: Gigabyte GA-Z87X-UD4H Graphics: NVIDIA GeForce GTX 670 2047 MB CPU: 3.5 GHz Intel Core i7 RAM: 16GB HDD: 1x Seagate 256GB

Any help would be much appreciated.

submitted by /u/Djk2001
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