I'm new here. I just started to solo mine here today.
If you have any recommendations for me on how to make the most out of it, I'd be grateful.
For now, I only have an old Antminer S3. Does it make any sense?
Is a high number of "Discarded" normal?
Cheers.
I had high rejected on my s3's so I updated the s3 to the kano firmware and the ratio did drop it also sorted out the high load issue too.
You can find the updated s3 firmware for kano update here if you know how to ssh into the device it is very easy to install just copy and paste in the commands.
https://bitcointalksearch.org/topic/m.21422964
https://bitbucket.org/TheKano/cgminer-binaries/src/f5884bfece7a8dfd48550cb172272212459be51c/AntS3/?at=master
Follow the guide you should have no problems.
You will always get some rejected shares even after the update but the load should be lower and it updates the gui with more relevent status.