GoPro 3 Black is very sluggish on CS6. Twixtor is badly threaded and does not support CUDA acceleration.
Re option 1:
- The 980 is way overkill, a 760 is more than enough.
- 16 GB memory is not enough, you want 32 GB.
- Forget about the EVO. It is way too slow with writes. Get a 850 Pro.
- Get some more HDD's and SSD's to improve disk I/O.
Re option 2:
- Only one video card is supported under CS6. Skip the second one.
- 16 GB memory is not enough, you want 32 GB.
- a single 120 GB SSD for media cache and previews is very small. Better use 256 GB Samsung 850 Pro.
With GoPro material and even with the suggested improvements (more memory, better disk I/O) you will still encounter sluggishness, jerkiness, choppy behaviour, because of the quad core CPU.
See Tweakers Page