Because you're on 110V and I'm on 220V ?
Or maybe I'm just wrong
S5:590Wx4
S3+:390Wx4
220 would be it..
so you can kind of do some quick calculations.. the s5 is .5j/ghs and the s3 is .9.
i run my s5s at 325 and they are just right at 1th using 500 watts.
the s3s id turn down to 200, they would be at 400ghs using around 323 watts.
that would be 15a?