Thank you. As long as it wont break anything I'm happy. I just wanted an audiophile grade c7 cable. I guess the third pin may just be for stability? Or making sure you get the correct polarity?

I don't spend a lot of money on cables... But I prefer overkill on the shielding. I have computer power cables ontop of xlr ontop of rca cables for miles. The rme is the only thing left with a normal cable. So why not replace the cord going to the power supply with a cable that has better shielding?

Will it make a difference? Maybe not. I'm just trying to make sure all my cables are shielded from each other's emi or rf frequencies. They are also thicker guage. Sometimes the provided cable is not thick enough. I know this is not the case for the rme.

The third prong will also make sure I put the plug in with the right polarity. I'm not sure if that matters either though. And the third prong, if not detrimental, will provide a better grip with the plug.

Relax, i spent 20$. I have an rme adi 2 dac into benchmark hpa4. It's a very small % of the total cost of my system.