Hello, iam not an expert but I think 3A is the maximum usage, not the realtime usage. It's better to run 1.25/1.5A at 50% of a 3A psu than running 1.25 at 100% of a psu ( I think) it's better for the lifetime.Where are the 3 amps specified, or how did you calculate them? Maybe I'm wrong but 3 amps is a lot.
Donde estan especificados los 3 amperios, o como los calculaste? Tal vez yo este equivocado pero 3 amperios es mucho.
Let me know if iam good or wrong in this case. Thanks.