Okay
I'll try that.
Also, did you tell Slush an expected hash rate for the S4 or did you let Slush auto detect expected hash rate for the S4?
I set it to 1800 over at slush, as from my previous experience, my chain 1 goes offline every now and then when I first got the S4. If it goes below 1800, I know chain 1 has gone offline and it'll need a hard reset. But funny thing is, it has not happened in a while... maybe it just needs to run in.