View Port Performance

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I came across this youtube product review: 

The tool "Pose Architect" flows so smoothly while posing the model in the video yet I have not been able to get that type of performance. Does anyone else have this tool and also have similar performance where as you are moving the slider the model (I am using Genesis 8, think the video is Genesis 3, I hope that isn't a major factor) is following along without issue. What component in the PC is at play to provide that level of responsiveness. I have come across a few different forum post with different explanation, so saying Daz's viewport CPU bound and also single threaded, others saying the viewport is GPU bound, trying to get a clear answer so I can figure out what should be the focus for my next PC build. 

My PC specs are a bit old :
intel i7 8700k
48 GB of Ram
Nvidia GTX 1070