I'm trying to figure out these PSU problems and I'm really lost here. I tried a bunch of chargers, I know they're not supposed to keep 5V under the load but well, it's supposed to keep it under 1A at least (so reads the label). These are chargers from HTC/Samsung smartphones so I could say it's not china crap, it's more like china not that crap ^^ Never the less, I always get below 4.7-4.8V (between TP1 and TP2) with Ethernet plugged in. It gets worse obviously when I plug some USB devices in or when I run some app/h264/3D game.
Now I took some D-Link Router PSU, rated 5V 2.5A. Should be all good? Well, no. It also "fails" and drops to 4.6V when playing a 1080p video thru Ethernet.
Last but not least: the ATX PSU! This time it's a good switching one so it should have no problem at all. Guess what! Also failing. I couldn't even been able to use Ethernet with it!
What's left... I tried to measure current but the multimeter drops too much power and the RPi fails to boot properly. I used thick enough cables I think, thicker than those found in cheap china PSUs.
And finally: I'd say that, apart from the ATX PSU, every other smaller ones did the trick, they're not totally failing, apart from the voltage drop, for example I was able to plug some USB devices in (keyboard+mouse, Wifi adapter, flash disk...), use Ethernet and HDMI, and run apps. But I think that it's not giving all its power, and perhaps I can get some other problems just because of this PSU problem (for instance: sound is quite sluttered, it's horrible, you can't hear a song with that it's devastating it - in my sense). How hard is it to find a GOOD PSU which can firmly HOLD those freakin 5V all the load long? Did you find one that proves to work good?
Thanks in advance.