question about external clocking for a Lynx AES16e card

A few weeks ago I installed a Lynx AES16e PCIe card in my computer because I wanted to try a non-USB solution.   It sounded a little rough for the first few days, but now I actually prefer it a bit to the SOtM USB output I was using previously. 

One of the features that the Lynx card has is that it can accept a word-clock input from an external clock.  I know this feature is intended for studio use, to synch all digital devices to the same clock.   But could a quality crystal clock like a Grimm (CC1 or CC2) positively impact the sound in a non-studio setup?  Or has the clocking in the card already been optimized?

I'm curious if anyone has this card and has tried external clocking....
thank you

Dave