I know that the (optional) bundled bricks are --rated-- at 6A, but what are people finding for an actual usable rating?

I've got 2 pods up and running. I started them off with the default settings in cgminer and they ran with no issues for a day at 200MHz.  At that point I decided to see if they would go a little higher so I upped it to 225MHz.  As soon as it ramped up to 225MHz one pod dropped back to 200MHz and would repeat going up and down.  The second pod followed a little after.  Thinking it might be the tipping point of the power supply, I tried lowering the voltage adjustment.  Dropping it slightly allowed both pods to run at 225MHz and that was the highest they would go.