The Matrix is non reference and does not accept watercooling. I have figured out a way to watercool the card and keep the same look. Its pretty cheap to do if you alrighty own the corsair Hxx series cooler.
Ive held off posting this till I had a few weeks to play with it,,,,make sure it was safe
Here is a link to two cards ive done now, the second being the Asus Matrix ROG card.
Check it out here:
Let me know what you think