My card already has memory heatsinks attached to it,
and I do not feel like trying to get them off so any heatsink which also covers the memory will be out of the question for me.
So the artic nv3 would be fine then ... although I am not sure if the current memory heatsinks will be in the way. No harm in trying ofcourse.
Also, are the mounting points for a heatsink the same on a 5900xt and a 5900nu board ... would you happen to know that by any chance? That is my main concern atm.
I finally found a picture of what my card looks like (apart from the color of the PCB): http://www.theinquirer.net/images/articles/CLUB591.jpg
and tnx for the help