Hello Dev,

I started mining a month ago and used PhoenixMiner most of the time.

Every 2 or so days all my cards start getting about 30% invalid shares on my 12x 3070 rig on HiveOS. At first I thought I had an issue on the rig, maybe the mobo since it was all cards at once. But everything seemed normal and even cards at 39c had the issue. Restarting the miner always solved it.

A few weeks later I made a 2 new rigs on a different city, 3000km away (2x 12x 3070). The issue happened again, on all 3 rigs at once. This ruled out local issues.

I changed one of the rigs to a different miner just to troubleshoot if it was an issue with PhoenixMiner, and apparently is. The two rigs on PhoenixMiner exhibited the same issue a couple times, while the rig on the other miner didn't.

I searched a bit and found a post on reddit with someone with the same issue, he didn't name PhoenixMiner but said many miners are experiencing the same issue on 3060 and 3070: https://www.reddit.com/r/EtherMining/comments/lz7a3f/best_mining_software_and_how_to_choose_it/gq0s4my/?utm_source=reddit&utm_medium=web2x&context=3

Apparently it has something to do with epoch changes, I researched a bit and an epoch change occurs in eth between 8 and 48 hours, which is in line of the issue happening every few days. If a new DAG needs to be generated, the issue is likely the same when we start the miner with overclocking and get tons of invalid shares. That's why HiveOS have a config option to overclock only X seconds after miner start.

If I correctly diagnosed the issue, the solution will likely be to either restart the miner on a new epoch or send some message to HiveOS to bring the cards to default settings during epoch changes, or some other software change that makes the cards be in a stable state when loading DAGs while overclocked.

I will happily change back to PhoenixMiner when there is a solution for this issue, keep up the great work!

Thanks!

GT value is not one way, going higher or lower from the optimum value will decrease the hash rate and may cause instability. Leave it on auto tune as recommended.

If you expect crashes when switching epochs, give the -lidag <n> option a try and choose slowest, use together with -gser 2

my 5700 didnt crash so far