My apologies to all who have replied. I didn't have the card in front of my when I made the original post. It is an 8800GT, not GTX.
Yes. The tubes have liquid inside. Don't cut them!
It is heat pipe system with circulating liquid inside and is the reason it cools so cool.
Looks like you're right. I went back and read the Arctic Cooling website and it says. "The heatpipes with sintered powder wicks provide ultimate heat conductivity." I had to look up sintered wicks, but yeah, there's liquid in there. Too bad since I accidentally put a light fingerprint in the putty. No returning it now.
Anyone have suggestions for a quiet cooler for this card? It was always a little loud, but is worse now that the original PNY fan is failing.