Hello
Generally speaking, are the fans on S5 and S3 the same?
With an S5 the fan at 3,000 is probably 10 times the sound of the two fans on the S3 running at the same speed. But they are running at the same RPM.
Naw, the S3 fan at high speed have a very loud noise as well, its just that the S3 did not run them at full speed. When ran at similar RPM they have similar noise level, but the S3 get a higher pitch faster.
I think the S5 fan simply can reach higher RPM, so if the RPM of the "global fan" is set properly, there will be no noise issue.
Here there is an S3 running two fans, 1@4000RPM, 2@2000RPM, and it is very quiet. Nearly silent.
And then there is an S5 running one fan @3400RPM and it is 10 times louder at least. To get to a similar loudness with S5 requires going down to around 1600-2000RPM