I have a Ultra right now that has the same fan as the g3. I took my G3 back so i cant say much about it. I do reccomend the orb on the G3 just for the reduction in noise alone.It works great on my Ultra so it should do the same on the G3 since they are the exact same fan and hs combo. Alos for the time i had the card i was at 225/ 530 with no problems. I am at 265/ 500 with my Ultra.