I just wanted to post some thanks to everyone here who provided all the pictures and knowledge on doing these mods. I hardmodded a 3870 with trimmers for GPU and Memory voltage (to 1.6V and 2.05V respectively) and got a stable card running at 940/1210 using the stock cooler, it doesn't exceed 80 degrees C under load but I figure I pushed it enough. I was able to bench it at 1280 memory with some artifacts and 1210 without. While I was at it, I replaced many of the 180uf caps with 330uf, and added more 220uf caps in the spots where there were none. On the 2.5V plane I added 1x 2200uf cap to the top of the board (memory) and 2x 2200uf behind the board, so the board's capacitance increased about three-fold.

One thing I found was that my Weller WD1000M goes up to a max temperature of 850 degrees F. I found this was not sufficient to melt the solder used on the board (as I wanted to remove the 800uf caps, but I could not melt the solder!) so I had to just tack on a couple loose ones and glue them down.

I have 4 more water cooled cards I want to modify the same way, as I can push the voltage way up on those. I just learned from MSI Tech Support that they will NOT be adding a Northbridge multiplier into the K9A2 Platinum (V1) BIOS. They used to have it in a beta bios (1.13). They claim due to lack of hardware support which is complete crap. So I will be looking for another motherboard for my water cooled beast.