leave the settings alone.
you DONT WANT to dedicate your second gpu for physx
as long as it's enabled in nvidia control panel it's working. just probably a bug of gpu-z
Cheers buddy

Thanks again for your very swift responses, you've been a big help

I guess this thread will come to an end once I dial in my overclocking for the cpu lol. I wanted to overclock the gpus as well but I don't think that will make any difference, especially giving the fact I will build a new rig so I will be using that rig for hardcore gaming and not my current rig.