Originally Posted by hawkeye071292
Yea I bet thats what it is. May need to be soldered again with better materials. I mean the unit itself is cheap, so you can assume it is made cheap as well. Maybe add a little to it to make the bus wider? Not a soldering fanatic, but shouldn't that provide more stable power?
Well, that would contribute more to heat than anything, which can contribute to instability on it's own. You do need a big enough trace for whatever current and voltage you want to run through it. My guess for the culprit is whatever ICs are actually handling the power delivery on the board. Bypassing those with an external setup that is normally overkill allows for a much more stable voltage (less ripple should increase stability to a point). PSU reviews from sites like johnnyGURU.com or overclockers.com (specifically Bobnova) (also note Mods I'm merely pointing to reviews and not advertising here) are excellent examples of how this is tested and shown. There are other sites as well but those are the two that popped into my head first. It all depends on what components are used to get the power that is required. I can explain more if you want.
However, I should point out that I could be completely wrong here. These SoC do have limits just like CPUs and you'll hit them eventually. I haven't used a raspberrypi nor have I seen what the voltage line looks like under a scope (while it is running) so I can't say anything definitive.