Yuppers...ALWAYS watch your amperage loads! I usually tell new builders that they need to install a power supply that can provide at least 25% more (and preferably 1/3rd more) current than the modules connected to it require. The reason is due to "current inrush"; when you first power on ANY circuit, there's a tiny interval where the components can draw more than the module's "operating" current. If that exceeds the P/S rating by TOO much, P/S go "pop!" And P/S go "pop!" isn't good, because different supplies can do various destructive things when they fail. If you're lucky, nothing happens. If not, you get some horrific spike across a DC bus that wreaks havoc on the whole damned build!
The other reason for overspeccing the power is heat. Heat gets generated by power circuits in direct proportion to current draw if the voltage is fixed. And heat in a synthesizer is NOT a good thing! Not only will it contribute to tuning instability and potentially increase noise factors, heat over long periods gradually causes component breakdown. And this is worst in the P/S module itself, which is also under the heaviest burden due to what it's doing. By going with a P/S that has considerably more current potential than is needed, the P/S can loaf along under a much easier load, and this prolongs its life and, by extension, the entire build itself.