It seems that Gigabyte has turned to Zalman for their coolers on their mid-range cards from both ATi & nVidia this time around. TweakTown has a comparison of both models: the X1950PRO vs. the GeForce 7900GS.

"The combination that HIS had with Arctic Cooling really seemed to help them differentiate themselves from the market. And even if it does cost the user more, knowing you have better quality after market cooling (without the need to sacrifice your warranty) is always a good thing."