well in terms of cost in ordering mass amounts... it would make more sense they used the same PN between cards gens. just added more chokes to handle the added current, since from the basic view i see. all the chokes are in parallelfor circuit, thats makes for a higher current ablilty. now weither the same PN is used by NV to ATI is another matter.. i would go with ATI's last or 2nd to last gen card for chokes, if you cant find/get a pn to use.

were you ever able to measure the chokes with a DMM?