MikalCarbine, which card?
My Giga 3870 has 100k pot (96,7k actual) and I get now 1,477V 2D and 1,519V 3D. I think 50k is a little bit too dangerous (over 1,55V 2D probably).
http://ceemic.pri.ee/hardware/hd3870/hd3870mod1.jpg

BTW other guys too: my WR card is dead