I didn't intend to sound cocky before, and I apologize if I did. this is, in fact, my first mod of this caliber. when I mentioned how you guys could appreciate my handiwork, I meant moreso than most of the people around here. my parents are clueless, my brother doesn't care unless it has an engine, and my girlfriend couldn't figure out what I was showing her (poor girl). oh well.
since then, I modified some of the scraps from the heatsink to make ramsinks... and now they stably push to 465, without any artifacts. I also did end up putting a fan on the hs... it's not a very big one, 40mm, but it makes a difference to airflow...
my case temps have gone up, by such a small margin that it doesn't really matter. my case went from 93f to 95f...
unfortunately, I started having some problems with hanging in particular games, so I scaled the gpu back down to 340. now it's stable in that respect again...
so it's a g4mx440 340/565 with bahs on gpu and ram.