The "Thundervolt" reference in that post is a project where they cut up a Wii PCB to leave just the DRAM and the processors on the PCB, and then they slap an external DCDC board on top of that cut up PCB to provide power to it, while also undervolting it since you reduce the IR losses. https://bitbuilt.net/forums/index.php?threads/thundervolt.62... That is pretty insane.
At this point I'm a bit surprised that nobody has created a netlist of the board and simply reinstalled the relevant chips on it. There has to be more density that can be eked out for easier that way than carefully taking a Dremel to an existing board.
- you can get Wiis for very cheap nowadays, perhaps cheaper than the parts themselves
- the original board makes heavy use of serpentine tracks. If they are not just to equalize track length, it’d be very hard to account for all delays in a redesign.
ofc I’m not a part of the community so their reasons might be complete different