Le power supply n'est pas suffisant. Ici c'est jusqu'à 1.5A et je pense qu'il vaut mieux un PS plus puissant

You should probably worry more about whether this build is playable first. Technically, there's NO VCAs in here (save for the Optomix's gates, which are only sort of that, and which WILL NOT WORK PROPERLY on CV or mod signals). And all of those 2hp modules jammed together aren't going to be fun to work with. Very serious "Sexy Module Syndrome" at play in here. Worry about the power loading LATER; there's far more problems with the whole thing in general!