CONNECT new variables; QV_DISABLE_D3D11 & QV_DISABLE_HARDWARE

All

I have just installed CONNECT on a HP Laptop with a NVIDIA Quadro FV 770M graphics card.  The latest drivers are installed but I get the strange zinger lines.  

At first I tried the QV_D3DVERSION = 9, but released this has been superseded by; QV_DISABLE_D3D11

NOTE:  Using the QV_DISABLE_D3D11 removed the issue.

Question:  What are the in-pack of using either or both of the following new variables:

QV_DISABLE_D3D11

QV_DISABLE_HARDWARE

Thanks

Ian Lapper