Can someone explain these stats?

[Jorsher]

I don't really understand the stats, and when I search around I find multiple explanations so I'm not sure what's true...

https://i.imgur.com/nqOLkgo.png

These are Antminer S1s.  Initially, one of them was showing an "x" for the status of one of the chips, all the time, and soon after every reboot.  That seems to have fixed itself...

What I'm concerned about is the number of discarded shares.  When I've seen other people post their discarded shares, it's nowhere near as high of a ratio as mine.

Another question: if they're both on the same pool, why does one use a 2048 Diff while the other uses 512?

Last, why does one get so many more discarded and so many more HW errors?

Anything to worry about or is there anything I can do to improve it?  Calculating the HW error percentage, one is 0.01% while the other is 0.23%.

[Chrithu]

I do not have S1s. My experience is only with GPUs (long time ago) and the Antminer U2s.

In my experience HW errors are a sign of misconfiguration or faulty hardware.

If those miners are running on factory clockspeeds it's pretty safe to assume that at least the one with the high number of HW Errors has one or more faulty chips inside.

If you have overclocked them try running them at factory speeds and see if that improves things.

[Hektur]

The S1 with the most hardware errors needs to be clocked down some to fine tune it.

[kabopar]

You probably need to look also at the temperatures of both.  On the bright side, each of these found 2 blocks, if that is correct you're a lucky person!
Which pool are you running those on?

Cheers

[Jorsher]

Hey all,

Thanks for the responses and sorry for the late reply.

In the last day, one got 99 HW errors and the other 133.  Close enough I'm not going to worry too much.  They are both overclocked.  One was reporting a fault with one of the chips for almost a week straight but now shows clear.

Difficulty is different between the two because it's set by the pool.

48-50C for both.

I'm using multipool right now.