I have an Avalon741 running on NiceHash with CGminer and I'm new to mining. The command I'm running is as follows:
sudo ./cgminer -o stratum+tcp://sha256.eu.nicehash.com:3334 -u <address> -p d=4096
When I run with this, I end up getting usually between 25% and 50% of shares rejected. Why is this? How can I improve the situation and contribute more effectively?
Here are some representative CGminer run statistics:
[2017-06-07 12:57:08.511] Started at [2017-06-07 02:20:49.716]
[2017-06-07 12:57:08.511] Pool: stratum+tcp://sha256.eu.nicehash.com:3334
[2017-06-07 12:57:08.511] Runtime: 10 hrs : 36 mins : 18 secs
[2017-06-07 12:57:08.511] Average hashrate: 5032956.9 Mhash/s
[2017-06-07 12:57:08.511] Solved blocks: 0
[2017-06-07 12:57:08.512] Best share difficulty: 140M
[2017-06-07 12:57:08.512] Share submissions: 7258
[2017-06-07 12:57:08.512] Accepted shares: 5335
[2017-06-07 12:57:08.512] Rejected shares: 1923
[2017-06-07 12:57:08.512] Accepted difficulty shares: 44435456
[2017-06-07 12:57:08.512] Rejected difficulty shares: 15138844
[2017-06-07 12:57:08.512] Reject ratio: 26.5%
[2017-06-07 12:57:08.512] Hardware errors: 11355
[2017-06-07 12:57:08.512] Utility (accepted shares / min): 8.39/min
[2017-06-07 12:57:08.512] Work Utility (diff1 shares solved / min): 94093.46/min
[2017-06-07 12:57:08.512] Stale submissions discarded due to new blocks: 7
[2017-06-07 12:57:08.513] Unable to get work from server occasions: 12
[2017-06-07 12:57:08.513] Work items generated locally: 274339
[2017-06-07 12:57:08.513] Submitting work remotely delay occasions: 6
[2017-06-07 12:57:08.513] New blocks detected on network: 1960
[2017-06-07 12:57:08.513] Summary of per device statistics:
[2017-06-07 12:57:08.513] AV7 0 (5s):32.99G (avg):5.032Th/s | A:44435456 R:15138844 HW:11355 WU
[2017-06-07 12:57:08.513]
