rf noise

If you believe Benchmark's marketing then the answer's a definite 'no' - https://benchmarkmedia.com/blogs/application_notes/152143111-audio-myth-switching-power-supplies-are-noisy However if you read further down, they do admit that 'many switching supplies are noisy'. They put this down to...

If your looking for a low electrical noise power supply avoid the Seasonic S12II ATX power supply. I assume it is causing by ground loop issues. My computer's "earth" is full of RF noise in the MHz region that is when shorted with a cap a clear 50 Hz can be seen on a scope, I was wondering if...